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Structure of foliicolous thalli of the Gomphillaceae in a south-western Florida lichen community

Published online by Cambridge University Press:  28 July 2016

William B. SANDERS  and
Asunción DE LOS RÍOS
William B. SANDERS*
Affiliation:
Department of Biological Sciences, Florida Gulf Coast University, Ft. Myers, FL 33965-6565, USA
Asunción DE LOS RÍOS
Affiliation:
Departamento de Biogeoquímica y Ecología Microbiana, Museo Nacional de Ciencias Naturales (CSIC), C/ Serrano 115-dpdo, E-28006, Madrid, Spain
*
Email: [email protected]
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Abstract

Foliicolous lichens complete their life cycles upon non-deciduous leaves in humid tropical and subtropical environments. The anatomy of these lichens and its adaptations to this specialized niche have received only limited attention. The present work examines the structural organization in seven species of the Gomphillaceae that colonize palm leaves in south-west Florida, USA. Thalli with their leaf substratum were embedded in resin and examined with SEM in backscattered electron detection mode. All species showed a continuous, covering epilayer of fungal origin that consisted of relatively sparse, scattered cell lumina of reduced diameter connected by cell wall-derived material. Fungal cells were intermixed below this layer, with algal cells often resting directly on the substratum. Interactions between symbionts were mainly limited to wall-to-wall contacts without penetration. The epilayer showed continuity with the fungal prothallus at the perimeter of the thalli. Crystalline deposits in the upper portions of thalli were common, particularly in the species of Gyalectidium examined. All thalli were entirely epicuticular; some covered the stomata of the leaf beneath. It is suggested that the prominence of non-living wall materials and mineral crystals in thallus structure might serve to minimize the metabolic cost of fungal tissue in climates where warm temperatures at night result in higher rates of respiration.

Keywords

Aulaxinacortexepilayerfoliicolous lichensGyalectidiumGyalideopsisTricharialichen thallusprothallus
Type
Articles
Information
The Lichenologist , Volume 48 , Issue 4 , July 2016 , pp. 293 - 303
Copyright
© British Lichen Society, 2016 

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References

Anthony, P. A., Holtum, J. A. M. & Jackes, B. B. (2002) Shade acclimation of rainforest leaves to colonization by lichens. Functional Ecology 16: 808–816.Google Scholar
Chapman, R. (1976) Ultrastructural investigation on the foliicolous pyrenocarpous lichen Strigula elegans (Fée) Müll. Arg. Phycologia 15: 191–196.Google Scholar
Coley, P. D. (1988) Effects of plant growth rate and leaf lifetime on the amount and type of anti-herbivore defense. Oecologia 74: 531–536.CrossRefGoogle ScholarPubMed
de Oliveira, L. F. C., Edwards, H. G. M., Feo-Manga, J. C., Seaward, M. R. D. & Lücking, R. (2002) FT-Raman spectroscopy of three foliicolous lichens from Costa Rican rainforests. Lichenologist 34: 259–266.CrossRefGoogle Scholar
Ferraro, L. I., Lücking, R. & Sérusiaux, E. (2001) A world monograph of Gyalectidium (Gomphillaceae). Botanical Journal of the Linnean Society 137: 311–345.CrossRefGoogle Scholar
Galløe, O. (1927, 1932, 1954) Natural History of the Danish Lichens. Parts 1, 3, 9. Copenhagen: H. Aschehoug & Co., Dansk Verlag; Einar Munksgaard.Google Scholar
Giordani, P., Modenesi, P. & Tretiach, M. (2003) Determinant factors for the formation of the calcium oxalate minerals, weddelite and whewellite, on the surface of foliose lichens. Lichenologist 35: 255–270.CrossRefGoogle Scholar
Grube, M. & Lücking, R. (2002) Fine structures of foliicolous lichens and their lichenicolous fungi studied by epifluorescence. Symbiosis 32: 229–246.Google Scholar
Henssen, A. & Jahns, H.-M. (1974) Lichenes: Eine Einführung in die Flechtenkunde. Stuttgart: Georg Thieme Verlag.Google Scholar
Henssen, A. & Lücking, R. (2002) Morphology, anatomy and ontogeny in the Asterothyriaceae (Ascomycota: Ostropales), a misunderstood group of lichenized fungi. Annales Botanici Fennici 39: 273–299.Google Scholar
Honegger, R. (2012) The symbiotic phenotype of lichen-forming ascomycetes and their endo- and epibionts. In The Mycota IX, Fungal Associations, 2nd edition (B. Hock, ed.): 287–339. Berlin and Heidelberg: Springer-Verlag.CrossRefGoogle Scholar
Lange, O. L., Büdel, B., Meyer, A., Zellner, H. & Zotz, G. (2000) Lichen carbon gain under tropical conditions: water relations and CO2 exchange of three Leptogium species of a lower montane forest in Panama. Flora 195: 172–190.CrossRefGoogle Scholar
Létrouit-Galinou, M.-A. & Asta, J. (1994) Thallus morphogenesis in some lichens. Cryptogamic Botany 4: 274–282.Google Scholar
Lücking, R. (1998) Ecology of foliicolous lichens at the “Botarrama” trail (Costa Rica), a neotropical rain forest site. Part II. Patterns of diversity and area cover, and their dependence on microclimate and phorophyte species. Ecotropica 4: 1–24.Google Scholar
Lücking, R. (1999) Ecology of foliicolous lichens at the “Botarrama” trail (Costa Rica), a neotropical rainforest. IV. Species associations, their salient features and their dependence on environmental variables. Lichenologist 31: 269–289.CrossRefGoogle Scholar
Lücking, R. (2001) Lichens on leaves in tropical rainforests: life in a permanently ephemerous environment. In Life Forms and Dynamics in Tropical Forests. Dissertationes Botanicae Band 346 (G. Gottsberger & S. Liede, eds): 41–77. Berlin and Stuttgart: J. Cramer in der Gebrüder Borntraeger Verlagsbuchhandlung.Google Scholar
Lücking, R. (2008) Foliicolous lichenized fungi. Flora Neotropica 103: 1–866.Google Scholar
Lücking, R. & Bernecker-Lücking, A. (2000) Lichen feeders and lichenicolous fungi: do they affect dispersal and diversity in tropical foliicolous lichen communities? Ecotropica 6: 23–41.Google Scholar
Margot, J. (1977) L’épiphyllie des lichens du genre Strigula; est-elle un cas de parasitisme? Quelques observations morphologiques. Lichenologist 9: 51–63.CrossRefGoogle Scholar
Modenesi, P., Piana, M., Giordani, P., Tafanelli, A. & Bartoli, A. (2000) Calcium oxalate and medullary architecture in Xanthomaculina convoluta . Lichenologist 32: 505–512.CrossRefGoogle Scholar
Safranek, W. W. & Lücking, R. (2005) Gyalectidium floridense, a new foliicolous lichen from the southeastern United States. Bryologist 108: 295–297.CrossRefGoogle Scholar
Sanders, W. B. (2001) Lichens: the interface between mycology and plant morphology. BioScience 51: 1025–1035.CrossRefGoogle Scholar
Sanders, W. B. (2002) In situ development of the foliicolous lichen Phyllophiale (Trichotheliaceae) from propagule germination to propagule production. American Journal of Botany 89: 1741–1746.Google Scholar
Sanders, W. B. (2014 a) Complete life cycle of the lichen fungus Calopadia puiggarii (Pilocarpaceae, Ascomycetes) documented in situ: propagule dispersal, establishment of symbiosis, thallus development, and formation of sexual and asexual reproductive structures. American Journal of Botany 101: 1836–1848.CrossRefGoogle ScholarPubMed
Sanders, W. B. (2014 b) Duration of sabal palm leaves and their lichen colonists in southwest Florida. Bulletin of the British Lichen Society 115: 55–59.Google Scholar
Sanders, W. B. & de los Ríos, A. (2015) Structure and in situ development of the microlichen Gyalectidium paolae (Gomphillaceae, Ascomycota), an overlooked colonist on palm leaves in southwest Florida. American Journal of Botany 102: 1403–1412.CrossRefGoogle ScholarPubMed
Sanders, W. B. & Lücking, R. (2002) Reproductive strategies, relichenization and thallus development observed in situ in leaf-dwelling lichen communities. New Phytologist 155: 425–435.CrossRefGoogle ScholarPubMed
Sanders, W. B. & Lücking, R. (2015) Three new species of foliicolous Gomphillaceae (lichen-forming ascomycetes) from southern Florida. Bryologist 118: 170–177.CrossRefGoogle Scholar
Santesson, R. (1952) Foliicolous lichens I. Symbolae Botanicae Upsaliensis 12: 1–590.Google Scholar
Wadsten, T. & Moberg, R. (1985) Calcium oxalate on the surface of lichens. Lichenologist 17: 239–245.CrossRefGoogle Scholar
Zotz, G. & Winter, K. (1994) Photosynthesis and carbon gain of the lichen Leptogium azureum, in a lowland tropical forest. Flora 189: 179–186.CrossRefGoogle Scholar