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Author: H o n e g g e r , R | R . H o n e g g e r

  • Honegger, R 1978: Ascocarpontogenie, Ascusstruktur und -funktion bei Vertretern der Gattung Rhizocarpon. - Berichte der Deutschen Botanischen Gesellschaft 91: 579-594. [RLL List # 104-49 / Rec.# 8701]
    Keywords: RHIZOCARPON/ LECANORALES/ EVOLUTION/ BITUNICATE/ MORPHOLOGY
    Abstract: 21 figures. ["The Rhizocarpon species investigated seem to represent an archaic group, which could be interpreted as one of the missing links between the non-lichenized bitunicate Discomycetes and the Lecanorales."]
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  • Honegger, R 1978: The ascus apex in lichenized fungi. I. The Lecanora-, Peltigera- and Teloschistes- types. - Lichenologist 10: 47-67. [RLL List # 100 / Rec.# 8702]
    Keywords: ANATOMY/ ASCUS APEX/ LECANORA/ PELTIGERA/ TELOSCHISTES/ TEM/ ULTRASTRUCTURE
    Abstract: 5 figures. 8 plates.
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  • Honegger, R 1980: The ascus apex in lichenized fungi II. The Rhizocarpon-type. - Lichenologist 12: 157-172. [RLL List # 108-43 / Rec.# 8703]
    Keywords: TEM/ ASCUS/ MORPHOLOGY/ RHIZOCARPON/ LECANORALES/ OWN/ BITUNICATE
    Abstract: 8 figures. [The Rhizocarpon ascus differs from all other types in the Lecanorales. "It is bitunicate, opening with a slight 'Jack-in-the-box' mechanism." The Rhizocarpon-type ascus is considered to be the most archaic type in the Lecanorales.]
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  • Honegger, R/ Brunner, U 1981: Sporopollenin in the cell walls of Coccomyxa and Myrmecia phycobionts of various lichens: an ultrastructural and chemical investigation. - Canadian Journal of Botany 59: 2713-2734. [RLL List # 113-39 / Rec.# 8694]
    Keywords: SPOROPOLLENIN/ PHYCOBIONT/ COCCOMYXA/ MYRMECIA/ BAEOMYCES/ SYMBIOSIS/ CELL WALL/ CHEMISTRY/ ULTRASTRUCTURE/ TEM
    Abstract: 31 figures. 1 table. [Phycobionts were isolated from Baeomyces rufus (Myrmecia) and five ascomycete and basidiomycete lichens (Coccomyxa). "The type of wall structure affords protection against fungal parasitism and may be a significant factor in the success of some lichens and some other symbiotic systems."]
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  • Honegger, R 1982: Ascus structure and function, ascospore delimitation, and phycobiont cell wall types associated with the Lecanorales (lichenized ascomycetes). - Journal of the Hattori Botanical Laboratory 52: 417-429. [RLL List # 119-58 / Rec.# 8704]
    Keywords: ASCUS/ MORPHOLOGY/ STRUCTURE/ REVIEW/ PHYCOBIONT/ ASCOSPORES/ LECANORALES/ TEM/ ULTRASTRUCTURE
    Abstract: 26 figures. 1 table. [Summary of present status of our information on these topics. The author indicates many areas where additional work is needed before a more natural taxonomic scheme can be proposed.]
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  • Honegger, R 1982: Cytological aspects of the triple symbiosis in Peltigera aphthosa. - Journal of the Hattori Botanical Laboratory 52: 379-391. [RLL List # 119-58 / Rec.# 8705]
    Keywords: CYTOLOGY/ ULTRASTRUCTURE/ PELTIGERA/ SYMBIOSIS/ METABOLISM/ REVIEW
    Abstract: 20 figures. [Author concludes that further investigations are needed to "... correlate the data on metabolite exchange with ultrastructural features, and second, to elucidate the still poorly understood phenomena related to recognition and specificity in the triple symbiosis of Peltigera aphthosa as well as in other lichens."]
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  • Honegger, R 1982: The ascus apex in lichenized fungi III. The Pertusaria-type. - Lichenologist 14: 205-217. [RLL List # 117-50 / Rec.# 8706]
    Keywords: ASCUS/ PERTUSARIA/ MORPHOLOGY/ EVOLUTION/ PERTUSARIACEAE
    Abstract: 6 figures. [Detailed investigation of a new ascus type found only in a few genera in the Pertusariaceae. "The Pertusaria-type might represent a side-branch of evolution from bitunicate to unitunicate forms within the Lecanorales."]
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  • Honegger, R 1983: The ascus apex in lichenized fungi IV. Baeomyces and Icmadophila in comparison with Cladonia (Lecanorales) and the non-lichenized Leotia (Helotiales). - Lichenologist 15: 57-71. [RLL List # 117-51 / Rec.# 8707]
    Keywords: ASCUS/ MORPHOLOGY/ BAEOMYCES/ CLADONIA/ BAEOMYCETACEAE/ CLADONIACEAE/ CLASSIFICATION/ HELOTIALES/ LECANORALES/ ICMADOPHILA
    Abstract: 7 figures. ["Besides the distinct differences in ascus structure and function, cytological divergences were noted between the Baeomycetaceae and Leotia on the one hand, and Cladoniaceae on the other." The author supports the transfer of the Baeomycetaceae to the Helotiales from the Lecanorales as a "... consistent step towards a natural classification."]
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  • Honegger, R 1984: Cytological aspects of the mycobiont-phycobiont relationship in lichens. Haustorial types, phycobiont cell wall types, and the ultrastructure of the cell surface layers in some cultured and symbiotic mycobionts and phycobionts. - Lichenologist 16: 111-127. [RLL List # 121-40 / Rec.# 8708]
    Keywords: ULTRASTRUCTURE/ OWN/ MYCOBIONT/ PHYCOBIONT/ CYTOLOGY/ PELTIGE RA/ CLADONIA/ PARMELIA/ TEM/ RODLET LAYER/ TREBOUXIA
    Abstract: 8 figures. [Detailed cytological investigations on species of Parmelia, Peltigera, and Cladonia are reported. "In the symbiotic state of the mycobionts investigated a thin outermost wall layer with a distinct pattern was observed mainly in the hyphae contacting phycobiont cells and in the upper medullary layer. No comparable structures were noted on the hyphal surface of the cultured mycobionts ... investigated." The author briefly discusses the possible correlations of these cytological data with published immunological data on cell surfaces of phycobionts and mycobionts.]
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  • Honegger, R 1984: Scanning electron microscopy of the contact site of conidia and trichogynes in Cladonia furcata. - Lichenologist 16: 11-19. [RLL List # 120-76 / Rec.# 8709]
    Keywords: SEM/ CLADONIA/ TRICHOGYNES/ CONIDIA/ MORPHOLOGY/ DIKARYOTIZATION
    Abstract: 3 figures. [Documentation of the fusion of conidia with trichogynes in Cladonia furcata. "The sickle-shaped conidia fused, tip first, with the cell wall of trichogynes. Circular holes of about the diameter of the conidia found in the cell walls of trichogynes arise from enzymatic degradation of the wall material by fusing conidia. As the conidia appear to stick to any gelatinous surface material of the thallis the adhesion process is presumed to be unspecific."]
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  • Brunner, U/ Honegger, R 1985: Chemical and ultrastructural studies on the distribution of sporopolleninlike biopolymers in six genera of lichen phycobionts. - Canadian Journal of Botany 63: 2221-2230. [RLL List # 129-23 / Rec.# 2572]
    Keywords: CHEMISTRY/ SPOROPOLLENIN/ PHYCOBIONTS/ PHOTOBIONTS/ CELL WALL/ ACETOLYSIS
    Abstract: 16 figures. 2 tables. ["The present data indicate that cell walls of lichen phycobionts, and thus the types of interfaces, are even more diverse than previously expected." Includes a critical discussion of the acetolysis method.]
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  • Honegger, R 1985: Fine structure of different types of symbiotic relationships in lichens. - In: D. H. Brown (ed.): Lichen Physiology and Cell Biology. Plenum Press, New York and London, pp. 287-302. [RLL List # 127-82 / Rec.# 8710]
    Keywords: SYMBIOSIS/ TEM/ ULTRASTRUCTURE/ SEM/ PELTIGERA/ COCCOMYXA/ TREBOUXIA/ CLADONIA/ PARMELIA/ CARBOHYDRATE TRANSFER
    Abstract: 10 figures. [SEM observations and interpretation of symbiotic relationships concentrating on the Peltigera-Nostoc, Peltigera-Coccomyxa, and the lecanoralean-trebouxioid associations. Author also reviews the translocation of water and photosynthates between the symbionts. "The role of haustorial and appressoria-like structure in lichens may have been underestimated ...." Comparisons are also made with mycorrhizal associations.]
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  • Honegger, R 1985: The hyphomycetous anamorph of Coniocybe furfuracea. - Lichenologist 17: 273-279. [RLL List # 126-48 / Rec.# 8711]
    Keywords: ANAMORPH/ CONIOCYBE/ OWN/ HYPHOMYCETE/ IMPERFECT FUNGI/ CALICIALES/ SEM/ TEM
    Abstract: 3 figures. ["Under favourable climatic conditions the mycobiont of Coniocybe furfuracea bears masses of conidia in chains on macronematous conidiophores. Coniocybe furfuracea is one of the very few lichen mycobionts so far known with a teleomorph and hyphomycetous anamorph."]
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  • Honegger, R 1986: Ultrastructural studies in lichens. I. Haustorial types and their frequencies in a range of lichens with trebouxioid photobionts. - New Phytologist 103: 785-795. [RLL List # 129-77 / Rec.# 8712]
    Keywords: SEM/ TEM/ ULTRASTRUCTURE/ HAUSTORIA/ APPRESSORIA/ MORPHOLOGY/ SYMBIOSIS/ TREBOUXIA
    Abstract: 1 table. 7 figures. [SEM and TEM studies. "Between 150 and 350 algal cell halves per species were examined by SEM in order to calculate the predominant type of interaction." Interactions were categorized as (1) wall-to-wall apposition (simple or appressorium), (2) intracellular haustoria (with/without sheath, neckband, collar or papilla), or (3) intraparietal haustoria (3 types). Seventeen species were investigated.]
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  • Honegger, R 1986: Ultrastructural studies in lichens. II. Mycobiont and photobiont cell wall surface layers and adhering crystalline lichen products in four Parmeliaceae. - New Phytologist 103: 797-808. [RLL List # 129-78 / Rec.# 8713]
    Keywords: TEM/ SEM/ ULTRASTRUCTURE/ SECONDARY METABOLITES/ METABOLISM/ PARMELIA/ CETRELIA/ PLATISMATIA/ PSEUDEVERNIA/ CELL WALL
    Abstract: 7 figures. 1 table. ["In freeze-dried SEM preparations of all four species, crystalline secondary metabolites of fungal origin were detected on the surface of the algal symbiont." Possible metabolic roles of these substances are discussed.]
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  • Honegger, R 1987: Isidium formation and the development of juvenile thalli in Parmelia pastillifera (Lecanorales, lichenized ascomycetes). - Botanica Helvetica 97: 147-152. [RLL List # 140 / Rec.# 8714]
    Keywords: LECANORALES/ ISIDIA/ PARMELIA/ SEM/ DEVELOPMENT
    Abstract: 17 figures. ["Of all isidia-bearing taxa so far investigated, the isidia of P. pastillifera are the only ones which reach a high degree of external and internal differentiation on the mother thallus in an inversed position. Mature isidia represent dorsiventrally organized juvenile thalli which adhere to the substrate with their morphological upper side after detachment from the mother thallus."]
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  • Honegger, R 1987: Questions about pattern formation in the algal layer of lichens with stratified (heteromerous) thalli. - In: E. Peveling (ed.): Progress and Problems in Lichenology in the Eighties. Bibliotheca Lichenologica No. 25. J. Cramer, Berlin-Stuttgart, pp. 59-71. [RLL List # 131 / Rec.# 8715]
    Keywords: PHOTOBIONT/ MORPHOLOGY/ DEVELOPMENT/ HETEROMEROUS/ TREBOUXIA/ REGULATION
    Abstract: 22 figures. [Studies on the control of algal growth in lichen thalli are discussed. "The photobiont cells of non-growing areas are slowed down in their metabolic activity by a, probably, mycobiont-derived inhibitory complex, the molecular basis of which is not yet understood. Phenolic lichen products may, at least in some groups of lichens, be involved in inhibitory mechanisms."]
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  • Fiechter, E/ Honegger, R 1988: Seasonal variations in the fine structure of Hypogymnia physodes (lichenized Ascomycetes) and its Trebouxia photobiont. - Plant Systematics and Evolution 158(2-4): 249-263. [RLL List # 137 / Rec.# 5631]
    Keywords: HYPOGYMNIA/ TEM/ ULTRASTRUCTURE/ SEASONAL VARIATION/ TREBOUXIA
    Abstract: 6 figures. [Samples were obtained near Zurich, Switzerland, for LM and TEM studies. "Highest germination rates and intense aplanospore formation were observed in January, highest particle densities in both external and internal fracture faces of the plasma membrane in March. Lipids and starch were most abundant in spring to early summer. In summer and autumn numerous photobiont cells died off."]
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  • Honegger, R 1988: The functional morphology of cell-to-cell interactions in lichens. - In: Scannerini, S/Smith, D/Bonfante-Fasolo, P/Gianinazzi-Pearson, V (eds.): Cell to Cell Signals in Plant, Animal and Microbial Symbiosis. Springer-Verlag, Berlin, Heidelberg, pp. 39-53. [RLL List #  / Rec.# 8716]
    Keywords: HAUSTORIA/ MYCOBIONT-PHOTOBIONT INTERACTIONS
    Abstract: 4 fig.
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  • Honegger, R 1990: Mycobiont-photobiont interactions in adult thalli in axenically resynthesized pre-thallus stages of Xanthoria parietina (Teloschistales, lichenized ascomycetes). - In: H. M. Jahns (ed.): Contributions to Lichenology in Honour of A. Henssen. Bibliotheca Lichenologica. No. 38. J. Cramer, Berlin-Stuttgart, pp. 191-208. [RLL List # 141 / Rec.# 8717]
    Keywords: MYCOBIONT/ RESYNTHESIS/ GROWTH/ SEM/ MORPHOLOGY/ XANTHORIA/ PARMELIACEAE/ PHOTOBIONT/ DEVELOPMENT
    Abstract: 19 figures. 2 tables. ["Resynthesis experiments under axenic conditions with a fungal multispore isolate and a strain of Trebouxia aggregata resulted in pre-thallus stages of development with crust-like, non-stratified and non-polarized fungus-alga consortia in which the photobiont cells were ensheathed by a fungus-derived wall surface layer and contacted by haustorial complexes similar to the ones observed in adult thalli."]
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  • Honegger, R/ Kutasi, V 1990: Anthraquinone production in three aposymbiotically cultured teloschistalean lichen mycobionts. - In: Nardon, P/Gianinazzi-Pearson, V/Grenier, AM/Margulis, L/Smith, DC (eds.): Endocytobiology IV. Institut National de la Recherche Agronomique, Paris, pp. 175-178. [RLL List # 148 / Rec.# 8698]
    Keywords: ANTHRAQUINONES/ CARBON SOURCE/ CULTURED MYCOBIONTS
    Abstract: 1 tab. ["The present paper aims to summarize few preliminary data out of a series of culturing experiments with aposymbiotic teloschistalean mycobionts in which the influence of the carbon and nitrogen sources on anthraquinone and carotenoid production were to be examined."]
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  • Honegger, R/ Bartnicki-Garcia, S 1991: Cell wall structure and composition of cultured mycobionts from the lichens Cladonia macrophylla, Cladonia caespiticia, and Physcia stellaris (Lecanorales, Ascomycetes). - Mycological Research 95(8): 905-914. [RLL List #  / Rec.# 8693]
    Keywords: CELL WALLS/ CHITIN/ CLADONIA/ PHYSCIA/ TEM/ X-RAY DIFFRACTION
    Abstract: 19 fig. 1 tab. ["...the cell walls of the three lichen mycobionts were similar in structure and composition to the walls of non-lichenized euascomycetes - they all belong in the same chitin-B-1, 3-glucan category."]
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  • Honegger, R 1991: Functional aspects of the lichen symbiosis. - Annual Review of Plant Physiology and Plant Molecular Biology 42: 553-578. [RLL List #  / Rec.# 8718]
    Keywords: CARBOHYDRATE TRANSFER/ CELL WALLS/ GAS EXCHANGE/ MYCOBIONT-PHOTOBIONT INTERFACE/ POLYOL METABOLISM/ WATER RELATIONS
    Abstract: 5 fig. 1 tab. [Reviews aspects of the lichen mycobiont-photobiont interface and carbohydrate transfer, CO2 uptake and photosysnthesis, polyol metabolism, and water relations.]
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  • Honegger, R 1991: Fungal evolution: symbiosis and morphogenesis. - In: Margulis, L/Fester, R (eds.): Symbiosis as a Source of Evolutionary Innovation. The MIT Press, Cambridge, Massachusetts, pp. 319-340. [RLL List #  / Rec.# 8719]
    Keywords: EVOLUTION/ MORPHOGENESIS/ SYMBIOSIS
    Abstract: 20 fig. [Review of lichen morphogenesis.]
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  • Honegger, R 1992: Lichens: Mycobiont-photobiont relationships. - In: Reisser, W (ed.): Algae and Symbioses: Plants, Animals, Fungi, Viruses, Interactions Explored. Biopress Limited, Bristol, England, pp. 255-275. [RLL List # 153 / Rec.# 8720]
    Keywords: MYCOBIONT/ PHOTOBIONT/ REPRODUCTIVE STRATEGIES/ SEM/ SYMBIOSIS
    Abstract: 41 fig. 3 tab. [Review article with sections on lichen mycobionts, thallus morphology and mycobiont-photobiont relationships (with many SE micrographs and other figures), and a section on reproductive strategies.]
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  • Honegger, R 1993: A simple outdoor culturing system for the foliose macrolichens Xanthoria parietina (L.) Th. Fr. and Parmelia sulcata Taylor. - Botanica Helvetica 103: 223-229. [RLL List # 156 / Rec.# 8721]
    Keywords: CERAMICS/ CULTURE/ PARMELIA/ WHOLE LICHEN CULTURE/ XANTHORIA
    Abstract: 2 fig. [Lichen fragments were glued to especially designed ceramic supporting structures which were either glued to sheets of asbestos or partially immersed in natural or artificial substrata in small terracotta pots which were in turn kept immersed in peaty soil inside large asbestos containers. The lichens were incubated on flat roof tops.]
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  • Honegger, R 1993: [Review of:] : Tansley Review No. 60. Developmental biology of lichens. . - New Phytologist 125: 659-677. [RLL List # 155 / Rec.# 8722]
    Keywords: DEVELOPMENTAL MORPHOLOGY/ DIFFERENTIATION/ GROWTH PATTERNS/ ONTOGENY
    Abstract: 7 fig. 1 tab. ["This review summarizes data on the ontogeny, functional morphology, growth patterns and internal thalline differentiation of macrolichens."]
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  • Honegger, R/ Kutasi, V/ Ruffner, HP 1993: Polyol patterns in eleven species of aposymbiotically cultured lichen mycobionts. - Mycological Research 97(1): 35-39. [RLL List # 151 / Rec.# 8697]
    Keywords: METABOLISM/ POLYOLS/ ROLE
    Abstract: 2 fig. 2 tab. [Study using mycobionts of Cladonia caespiticia, Parmelia acetabulum, Physcia semipinnata, Pertusaria pertusa, Xanthoria parietina, Chaenotheca chrysocephala, Coniocybe furfuracea, Baeomyces rufus, Normandina pulchella, Gyalecta jenensis, and Thelotrema lepadinum. Includes a discussion of the possible role of polyols in the lichen thallus.]
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  • Hawksworth, DL/ Honegger, R 1994: The lichen thallus: a symbiotic phenotype of nutritionally specialized fungi and and its response to gall producers. - In: Williams, MAJ (ed.): Plant Galls. Organisms, Interactions, Populations. The Systematics Association Special Volume, Clarendon Press, Oxford, pp. 77-98. [RLL List # 171 / Rec.# 7891]
    Keywords: EVOLUTION/ GALLS/ LICHEN DEFINITION/ LICHENICOLOUS/ NEMATODES
    Abstract: 23 fig. 2 tab. [Critique of the "lichen thallus as gall" analogy, an expanded definition of 'lichen, ' and discussion of the galls caused by other organisms on lichens.]
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  • Honegger, R/ Peter, M 1994: Routes of solute translocation and the location of water in heteromerous lichens visualized with cryotechniques in light and electron microscopy. - Symbiosis 16(2): 167-186. [RLL List # 156 / Rec.# 8700]
    Keywords: CRYOFIXATION/ DESICCATION/ FREEZE FRACTURE/ FREEZE-SUBSTITUTION/ LOW TEMPERATURE SEM/ SOLUTE TRANSLOCATION/ TEM/ WATER RELATIONS
    Abstract: 23 fig. [Study of Trebouxia arboricola (cultured) and Lobaria virens using light microscopy and TEM, and of L. virens, Peltigera canina, Parmelia sulcata and Xanthoria parietina using low temperature SEM.]
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  • Honegger, R 1995: Experimental studies with foliose macrolichens: fungal responses to spatial disturbance at the organismic level and to spatial problems at the cellular level during drought stress events. - Canadian Journal of Botany 73(Suppl. 1): 569-578. [RLL List # 161 / Rec.# 8723]
    Keywords: CRYOFIXATION/ DROUGHT STRESS/ INTRACELLULAR GAS BUBBLE/ LICHEN CULTURE/ LOBE GROWTH/ LOW TEMPERATURE SEM/ LOW TEMPERATURES/ POSITION DETECTION/ PSEUDOMERISTEM/ REGENERATION/ TEMPERATURE RESISTANCE/ WHOLE LICHEN CULTURE
    Abstract: 35 fig. ["Improved culture methods and the application of cryotechniques in light and electron microscopy have allowed new insights at the organismic and cellular levels in mycobiont-photobiont relations of selected lichen species. Growth, regenerative capacity, and the ability to cope with spatial disturbances were tested in the foliose macrolichens Xanthoria parietina and Parmelia sulcata."]
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  • Honegger, R/ Conconi, S/ Kutasi, V 1996: Field studies on growth and regenerative capacity in the foliose macrolichen Xanthoria parietina (Teloschistales, Ascomycotina). - Botanica Acta 109: 187-1993. [RLL List # 164 / Rec.# 8695]
    Keywords: COMPETITION/ COMPETITIVE INHIBITION/ GROWTH RATES/ REGENERATION/ XANTHORIA
    Abstract: 7 fig. [Study involving photographic monitoring over a period of five years in the botanical garden of the University of Zurich.]
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  • Honegger, R 1996: Experimental studies of growth and regenerative capacity in the foliose lichen Xanthoria parietina. - New Phytologist 133(4): 573-581. [RLL List # 164 / Rec.# 8725]
    Keywords: ASEXUAL REPRODUCTION/ FRAGMENTATION/ GROWTH/ PSEUDOMERISTEM/ REGENERATION/ XANTHORIA
    Abstract: 5 fig. ["A series of outdoor culturing experiments on artificial ceramic substrata was set up to test the regenerative capacity of thallus fragments of the foliose lichen Xanthoria parietina (L.) Th. Fr. which had been dissected along an axis from the growing marginal pseudomeristem to the apothecia-covered central areas."]
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  • Honegger, R 1998: The lichen symbiosis - what is so spectacular about it?. - Lichenologist 30(3): 193-212. [RLL List # 171 / Rec.# 8726]
    Keywords: DEVELOPMENT/ ECOPHYSIOLOGY/ REVIEW
    Abstract: 4 fig. 3 tab. [Review of some of the special attributes of lichens and their many unique ecological and physiological aspects. Also includes discussions regarding the present state of experimental lichenology and strategies for improving that state.]
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  • Honegger, R 1999: Long-term in vitro preservation of the symbiotic phenotype of lichen-forming fungi and their photobionts: the impact of different modes of storage on their viability. - In: Anon. (ed.): International Conference on Lichen Conservation Biology, Licons. Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland, pp. 19. [RLL List # 180 / Rec.# 21096]
    Keywords: CONSERVATION/ CULTURE/ LONGEVITY/ MYCOBIONT/ PHOTOBIONT
    Abstract: [Abstract.]
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  • Honegger, R/ Hugelshofer, G 2000: Water relations in the Peltigera aphthosa group visualized with LTSEM techniques. - In: Schroeter, B/Schlensog, M/Green, TGA (eds.): New Aspects in Cryptogamic Research. Contributions in Honour of Ludger Kappen. Bibliotheca Lichenologica, J. Cramer, Berlin, Stuttgart, pp. 113-126. [RLL List # 179 / Rec.# 8696]
    Keywords: CEPHALODIA/ LOW TEMPERATURE SEM/ PELTIGERA/ POIKILOHYDRIC/ SEM/ SYMBIOSIS/ WATER RELATIONS/ WATER UPTAKE
    Abstract: 5 fig.
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  • Scherrer, S/ De Vries, OMH/ Dudler, R/ Wessels, JGH/ Honegger, R 2000: Interfacial self-assembly of fungal hydrophobins of the lichen-forming ascomycetes Xanthoria parietina and X. ectaneoides. - Fungal Genetics and Biology 30: 81-93. [RLL List # 182 / Rec.# 21733]
    Keywords: CELL WALLS/ HYDROPHOBICITY/ HYDROPHOBINS/ RODLET LAYER/ XANTHORIA
    Abstract: 5 fig.
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  • Scherrer, S/ Honegger, R 2000: Inter- and intraspecific variation of homologous hydrophobin (H1) gene sequences among Xanthoria spp. (lichen-forming ascomycetes). - In: : The Fourth IAL Symposium, Progress and Problems in Lichenology at the Turn of the Millennium. Universitat de Barcelona, Barcelona, pp. 133. [RLL List # 181 / Rec.# 21379]
    Keywords: GENETIC DIVERSITY/ HYDROPHOBINS/ XANTHORIA
    Abstract: [Abstract from the International Association for Lichenology's fourth symposium, held in Barcelona, Spain, 3-8 September 2000.]
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  • Trembley, ML/ Ringli, C/ Honegger, R 2000: Hydrophobins in Dictyonema glabratum: the water repellent coat of the apoplastic continuum. - In: : The Fourth IAL Symposium, Progress and Problems in Lichenology at the Turn of the Millennium. Universitat de Barcelona, Barcelona, pp. 34. [RLL List # 181 / Rec.# 21458]
    Keywords: DICTYONEMA/ HYDROPHOBINS/ MOLECULAR BIOLOGY/ MYCOBIONT/ WATER RELATIONS
    Abstract: [Abstract from the International Association for Lichenology's fourth symposium, held in Barcelona, Spain, 3-8 September 2000.]
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  • Honegger, R/ Haisch, A 2001: Immunocytochemical location of the (1->3) (1->4)-beta-glucan lichenin in the lichen-forming ascomycete Cetraria islandica (Icelandic moss). - New Phytologist 150: 739-746. [RLL List # 184 / Rec.# 22250]
    Keywords: CELL WALLS/ CETRARIA/ IMMUNOCYTOCHEMISTRY/ LICHENAN/ LICHENIN/ LOW TEMPERATURE SEM/ SEM
    Abstract: 4 fig. ["The LTSEM observations and immunocytochemical data strongly suggest that lichenin is a structural compound, rather than a storage product, with important functions in thallus water relations."]
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  • Honegger, R 2001: The Symbiotic phenotype of lichen-forming ascomycetes. - In: Hock, B (ed.): The Mycota IX. Fungal Associations. Springer-Verlag, Berlin, Heidelberg, pp. 165-188. [RLL List # 182 / Rec.# 21734]
    Keywords: CEPHALODIA/ CONCENTRIC BODIES/ CORTEX/ HETEROMEROUS/ HOMOIOMEROUS/ LICHENICOLOUS/ MEDULLA/ MYCOBIONT-PHOTOBIONT INTERFACE/ ONTOGENY/ PHOTOBIONT/ PHOTOBIONT ACQUISITION/ PHOTOMORPHS/ PHOTOSYMBIODEMES/ THALLUS ANATOMY/ THALLUS MORPHOGENESIS
    Abstract: 10 fig. [Review.]
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  • Meier, FA/ Scherrer, S/ Honegger, R 2002: Faecal pellets of lichenivorous mites contain viable cells of the lichen-forming ascomycete Xanthoria parietina and its green algal photobiont, Trebouxia arboricola. - Biological Journal of the Linnean Society 76: 259-268. [RLL List # 190 / Rec.# 24070]
    Keywords: ARTHROPODS/ ASCOSPORE VIABILITY/ ASCOSPORES/ DISPERSAL/ FOOD/ GRAZING/ HYDROPHOBIN GENE SEQUENCE/ ITS/ MITES/ MOLECULAR BIOLOGY/ ORIBATIDS/ PHOTOBIONT/ PHOTOBIONT SOURCE/ RIBOSOMAL DNA/ TREBOUXIA
    Abstract: 14 fig. ["In a series of experiments, viable algal and fungal cells contained in such faecal pellets were cultured. The taxonomic affiliation of these isolates was identified using molecular techniques, i.e. comparative investigations of nuclear ribosomal gene data (ITS 1 and 2, 5.8S rDNA) in the algal and fungal partners, and of the species-specific hydrophobin gene sequence in the fungal partner."]
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  • Scherrer, S/ Haisch, A/ Honegger, R 2002: Characterization and expression of XPH1, the hydrophobin gene of the lichen-forming ascomycete Xanthoria parietina. - New Phytologist 154: 175-184. [RLL List # 187 / Rec.# 23373]
    Keywords: ENZYMES/ HYDROPHOBINS/ PHOTOBIONT/ PROTEINS/ WATER TRANSPORT/ XANTHORIA
    Abstract: 4 fig.
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  • Trembley, ML/ Ringli, C/ Honegger, R 2002: Differential expression of hydrophobins DGH1, DGH2 and DGH3 and immunolocalization of DGH1 in strata of the lichenized basidocarp of Dictyonema glabratum. - New Phytologist 154: 185-195. [RLL List # 187 / Rec.# 23372]
    Keywords: BASIDIOLICHENS/ ENZYMES/ HYDROPHOBINS/ PHOTOBIONT/ PROTEINS/ WATER TRANSPORT
    Abstract: 5 fig. ["Dictyonema glabratum hydrophobins surround wall surfaces in the photobiont layer of the fruitbody. Hydrophobin layers probably function to keep interhyphal spaces water-free, seal the apoplast to enable water translocation, and define strata within the basidiocarp."]
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  • Trembley, ML/ Ringli, C/ Honegger, R 2002: Hydrophobins DGH1, DGH2, and DGH3 in the lichen-forming basidiomycete Dictyonema glabratum. - Fungal Genetics and Biology 35: 247-259. [RLL List # 187 / Rec.# 23374]
    Keywords: BASIDIOLICHENS/ DICTYONEMA/ HYDROPHOBINS/ PHOTOBIONT/ PROTEINS/ SYMBIOSIS/ WATER RELATIONS
    Abstract: 5 fig.
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  • Trembley, ML/ Ringli, C/ Honegger, R 2002: Morphological and molecular analysis of early stages in the resynthesis of the lichen Baeomyces rufus. - Mycological Research 106(7): 768-776. [RLL List # 190 / Rec.# 24072]
    Keywords: BAEOMYCES/ ELLIPTOCHLORIS/ GENE EXPRESSION/ LICHENIZATION/ MYCOBIONT CULTURE/ PHOTOBIONT CULTURE/ RESYNTHESIS/ SYMBIOSIS
    Abstract: 12 fig. 2 tab.
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  • Honegger, R 2003: The impact of different long-term storage conditions on the viability of lichen-forming Ascomycetes and their green algal photobiont, Trebouxia spp. - Plant Biology 5: 324-330. [RLL List # 197 / Rec.# 26224]
    Keywords: ASCOSPORE GERMINATION/ ASEXUAL REPRODUCTION/ CRYOPRESERVATION/ PHOTOBIONT/ SEXUAL REPRODUCTION/ SOREDIA
    Abstract: 4 fig. 4 tab. [Studies on Hypogymnia physodes, Parmelia sulcata, Xanthoria parietina, X. fallax.]
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  • Eichenberger, C/ Scherrer, S/ Gansner, H/ Honegger, R 2004: Speciation in Xanthoria. - In: Randlane, T/Saag, A (eds.): Book of Abstracts of the 5th IAL Symposium. Lichens in Focus. Tartu University Press, pp. 14. [RLL List # 197 / Rec.# 26334]
    Keywords: SPECIATION/ XANTHORIA
    Abstract: [Abstract from "The 5th Symposium of the International Association for Lichenology" held in Tartu, Estonia, 16-21 August 2004.]
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  • Honegger, R 2004: Fine structure of the interaction of Leprocaulon microscopicum with its green algal photobiont, Dictyochloropsis symbiontica. - In: Döbbeler, P/Rambold, G (eds.): Contributions to Lichenology. Festschrift in Honour of Hannes Hertel. Bibliotheca Lichenologica, J. Cramer in der Gebrüder Borntraeger, Berlin, Stuttgart, pp. 201-210. [RLL List # 194 / Rec.# 25214]
    Keywords: DICTYOCHLOROPSIS/ EM/ HYDROPHOBICITY/ LEPROCAULON/ SEM/ ULTRASTRUCTURE/ WATER RELATIONS
    Abstract: 3 fig.
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  • Honegger, R 2004: Why do we need model organisms in experimental lichenology?. - In: Randlane, T/Saag, A (eds.): Book of Abstracts of the 5th IAL Symposium. Lichens in Focus. Tartu University Press, pp. 48. [RLL List # 197 / Rec.# 26444]
    Keywords: CULTURE/ MODEL ORGANISMS
    Abstract: [Abstract from "The 5th Symposium of the International Association for Lichenology" held in Tartu, Estonia, 16-21 August 2004.]
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  • Honegger, R/ Zippler, U/ Gansner, H/ Scherrer, S 2004: Mating systems in the genus Xanthoria (lichen-forming ascomycetes). - Mycological Research 108(5): 480-488. [RLL List # 195 / Rec.# 25413]
    Keywords: GENETIC VARIABILITY/ GENETICS/ HETEROTHALLISM/ HOMOTHALLISM/ MYCOBIONT CULTURE/ SEXUAL REPRODUCTION/ XANTHORIA
    Abstract: 3 fig. 3 tab. ["Genetic variability among sterile cultured single ascospore isolates of Xanthoria parietina, X. calcicola, X. ectaneoides, X. polycarpa and X. resendei was investigated with RAPD-PCR." Whereas the other five species are heterothallic, X. parietina is possibly homothallic.]
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  • Honegger, R/ Zippler, U/ Scherrer, S/ Dyer, PS 2004: Genetic diversity in Xanthoria parietina (L.) Th. Fr (lichen-forming ascomycete) from worldwide locations. - Lichenologist 36(6): 381-390. [RLL List # 197 / Rec.# 26273]
    Keywords: GENETIC DIVERSITY/ POPULATION BIOLOGY/ RAPD ANALYSIS/ XANTHORIA
    Abstract: 2 fig. 1 tab.
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  • Honegger, R/ Zippler, U/ Scherrer, S 2004: Mating systems and genetic diversity in the genus Xanthoria. - In: Randlane, T/Saag, A (eds.): Book of Abstracts of the 5th IAL Symposium. Lichens in Focus. Tartu University Press, pp. 41. [RLL List # 197 / Rec.# 26421]
    Keywords: BREEDING SYSTEMS/ GENETIC DIVERSITY/ XANTHORIA
    Abstract: [Abstract from "The 5th Symposium of the International Association for Lichenology" held in Tartu, Estonia, 16-21 August 2004.]
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  • Nyati, S/ Scherrer, S/ Honegger, R 2004: Photobiont diversity in the genus Xanthoria. - In: Randlane, T/Saag, A (eds.): Book of Abstracts of the 5th IAL Symposium. Lichens in Focus. Tartu University Press, pp. 65. [RLL List # 197 / Rec.# 26494]
    Keywords: PHOTOBIONT DIVERSITY/ XANTHORIA
    Abstract: [Abstract from "The 5th Symposium of the International Association for Lichenology" held in Tartu, Estonia, 16-21 August 2004.]
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  • Scherrer, S/ Zippler, U/ Honegger, R 2004: Cloning and sequencing of the complete beta-tubulin gene of Xanthoria parietina. - In: Randlane, T/Saag, A (eds.): Book of Abstracts of the 5th IAL Symposium. Lichens in Focus. Tartu University Press, pp. 48. [RLL List # 197 / Rec.# 26442]
    Keywords: BETA-TUBULIN/ GENE SEQUENCE/ GENES/ XANTHORIA
    Abstract: [Abstract from "The 5th Symposium of the International Association for Lichenology" held in Tartu, Estonia, 16-21 August 2004.]
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  • Scherrer, S./ Zippler, U./ Honegger, R. 2005: Characterisation of the mating-type locus in the genus Xanthoria (lichen-forming ascomycetes, Lecanoromycetes). - Fungal Genetics and Biology 42: 976-988. [RLL List # 201 / Rec.# 28124]
    Keywords: MATING TYPES/ XANTHORIA/ GENETICS/ MAT LOCUS/ α-BOX FRAGMENT/ α-DOMAIN/ HMG BOX/ HETEROTHALLIC/ HOMOTHALLIC/ IDIOMORPH/ SINGLE SPORE ISOLATES
    Abstract: [Authors used Xanthoria parietina, X. polycarpa, X. flammea and X. elegans. "The complete MAT locus, containing one ORF (MAT-2-1) coding for a truncated HMG-box protein, and two partial flanking genes, were cloned by screening a genomic lambda phage library of the homothallic X. parietina. The occurrence of mating-type genes in eight single spore isolates derived from one ascus was studied with a PCR assay. In the homothallic X. parietina a HMG fragment, but no α-box fragment was found in all isolates, whereas in X. elegans, another homothallic species, all tested isolates contained a fragment of both idiomorphs. Conversely, isolates of the heterothallic X. polycarpa contained either a HMG or an α-box fragment, but never both."
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  • Aptroot, A./ Honegger, R. 2006: Lichens in the New Botanical Garden of the University of Zürich, Switzerland. - Botanica Helvetica 116(2): 135-148. [RLL List # 206 / Rec.# 28388]
    Keywords: ZURICH/ SWITZERLAND/ BOTANICAL GARDEN
    Abstract: [149 species including Arthonia dispersa and Parmotrema perlatum, 2 Red Listed species. New to Switzerland: Bacidia adastra, Flavoparmelia soredians and Lecanora xanthostoma.
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  • C. Eichenberger, A. Aptroot and R. Honegger 2007: Three new Xanthoria species from South Africa: X. hirsuta, X. inflata and X. doidgeae. - Lichenologist 39(5): 451-458. [RLL List # 209 / Rec.# 29489]
    Keywords: XANTHORIA/ SOUTH AFRICA/ NEW TAXA/ TELOSCHISTACEAE
    Abstract: [New: Xanthoria hirsuta sp. nov., X. inflata sp. nov. and X. doidgeae sp. nov. All three species are fertile and lack asexual propagules.]
    – 10.1017/S0024282907006962

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  • Nyati, S./ Beck, A./ Honegger, R. 2007: Fine structure and phylogeny of green algal photobionts in the microfilamentous genus Psoroglaena (Verrucariaceae, lichen-forming ascomycetes). - Plant Biology 9(3): 390-399. [RLL List # 207 / Rec.# 29056]
    Keywords: VERRUCARIACEAE/ PHOTOBIONTS/ PHYLOGENY/ PSOROGLAENA/ CHORELLA/ AUXENOCHLORELLA/ SSU RDNA/ RBCL/ PROCHLOROPHYTES
    Abstract: [Report that Psoroglaena had "prochlorophyte" algal partner is incorrect; photobionts belong to the chlorophyte Trebouxiophyceae based on ultrastructure and molecular analyses.
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  • R. Honegger and U. Zippler 2007: Mating systems in representatives of Parmeliaceae, Ramalinaceae and Physciaceae (Lecanoromycetes, lichen-forming ascomycetes). - Mycological Research 111(4): 424-432. [RLL List # 208 / Rec.# 29569]
    Keywords: MATING SYSTEMS/ HETEROTHALLISM/ PARMELIACEAE/ RAMALINACEAE/ PHYSCIACEAE/ XANTHOPARMELIA/ RAPD-PCR FINGERPRINT ANALYSIS/ HOMOTHALLISM/ POLYMORPHIC MARKERS
    Abstract: [Using RAPD-PCR fingerprint analyses of 17 species from single spore isolates, " ... all species turned out to be heterothallic, polymorphisms among RAPD markers ranging from 10-87%."]
    – 10.1016/j.mycres.2007.02.005

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  • S. E. Favero-Longo, M. Girlanda, R. Honegger, B. Fubini and R. Piervittori 2007: Interactions of sterile-cultured lichen-forming ascomycetes with asbestos fibres. - Mycological Research 111(4): 473-481. [RLL List # 208 / Rec.# 29509]
    Keywords: CULTURES/ ASBESTOS/ CHRYOLITE/ LICHEN METABOLITES/ WEATHERING/ MYCOBIONT CULTURE/ LECANORA/ CANDELARIELLA/ XANTHOPARMELIA
    Abstract: [Mycobionts of Lecanora rupicola, Candelariella vitellina and Xanthoparmelia tinctina, cultured on chryolite fibers, tightly adhered and chemically affected the fibers in this weathering simulation. "Oxalic acid and pulvinic acid, mycobiont-derived metabolites of X. tinctina and C. vitellina, were involved in the weathering action."]
    – 10.1016/j.mycres.2007.01.013

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  • R. Honegger and S. Scherrer 2008: Sexual reproduction in lichen-forming ascomycetes. - In: T. H. Nash, III: Lichen Biology. Second Edition. Cambridge University Press, Cambridge. viii+486 pages, pp. 94-103. [RLL List # 212 / Rec.# 30038]
    Keywords: GENERAL/ TEXTBOOK/ REVIEW/ SEXUAL REPRODUCTION
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  • R. Honegger 2008: Morphogenesis. - In: T. H. Nash, III: Lichen Biology. Second Edition. Cambridge University Press, Cambridge. viii+486 pages, pp. 69-93. [RLL List # 212 / Rec.# 30036]
    Keywords: GENERAL/ TEXTBOOK/ REVIEW/ MORPHOGENESIS/ DEVELOPMENT
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  • R. Honegger 2008: Mycobionts. - In: T. H. Nash, III: Lichen Biology. Second Edition. Cambridge University Press, Cambridge. viii+486 pages, pp. 27-39. [RLL List # 212 / Rec.# 30037]
    Keywords: GENERAL/ TEXTBOOK/ REVIEW/ MYCOBIONTS/ LICHEN FUNGI
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  • R. Honegger 2009: Flechten: ökologische Aspekte der Wechselbeziehung zwischen Pilz und Alge [Lichens: ecological aspects of the relationship between fungi and algae]. - In: : Ökologische Rolle der Flechten. Rundgespräche der Kommission für Ökologie 36. Bayerische Akademie der Wissenschaften (Herausgeber), Verlag Dr. Freiderich Pfeil, München. 190 pages, pp. 25-41. [RLL List # 216 / Rec.# 30951]
    Keywords: REVIEW/ THALLUS DIFFERENTIATION/ MORPHOLOGY/ MYCOBIONT INTERFACE/ DROUGHT STRESS/ ECOLOGY/ WATER BALANCE
    Abstract: [Review discussion of many aspects of lichen anatomy/morphology in relation to the mycobiont-photobiont interface, water balance, poikilohydry, drought stress, temperature extremes and related topics. In German with an English summary.]
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  • B. Itten and R. Honegger 2010: Population genetics in the homothallic lichen-forming ascomycete Xanthoria parietina. - Lichenologist 42(6): 751-761. [RLL List # 221 / Rec.# 32405]
    Keywords: XANTHORIA/ HOMTHALLISM/ POPULATION GENETICS/ FINGERPRINTING TECHNIQUES/ RAPD-PCR ANALYSIS/ PCO/ STERILE CULTURE/ AMOVA
    Abstract: [Study of material from France and NE Switzerland using DNA fingerprinting (RAPD-PCR) found a high diversity of genotypes, " ... even among thalli growing side by side in phenotypically homogeneous populations. Intense genotype rather than gene (allele) flow seems to be an important element in X. parietina populations."]
    – 10.1017/S0024282910000411

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    Number of hits shown/total: 66/66.
    Number of records in database: 41424.
    Current date: 2019.08.17.OK