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New morphological aspects of cephalodium formation in the lichen Lobaria pulmonaria (Lecanorales, Ascomycota)

  • Carolina CORNEJO (a1) and Christoph SCHEIDEGGER (a1)

Cephalodia were investigated on young and mature thalli of Lobaria pulmonaria. Cephalodia originate from contact between hyphae and cyanobacteria on the upper or lower cortex or, less frequently, in the apical zone. Young thalli were found to associate with cyanobacteria even in the anchoring zone. Cephalodia formed on the young thalli or the anchoring hyphae share the same phenotypic characteristics. In spite of being composed of paraplectenchymatous hyphae, the cortex of mature thalli preserves a considerable plasticity, enabling the formation of cephalodia. The cyanobacterial incorporation process begins with cortical hyphae growing out towards adjacent cyanobacterial colonies, enveloping them and incorporating them into the thallus. The incorporation process is the same on the upper and the lower cortex. Early stages of cephalodia are usually found in young lobes, whereas in the older parts of the thallus only mature cephalodia are found.

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M. E. Antoine (2004) An ecophysiological approach to quantifying nitrogen fixation by Lobaria oregana. Bryologist 107: 8287.

J. W. Benner , S. Conroy , C. K. Lunch , N. Toyoda & P. M. Vitousek (2007) Phosphorus fertilization increases the abundance and nitrogenase activity of the cyanolichen Pseudocyphellaria crocata in Hawaiian montane forests. Biotropica 39: 400405.

A. De los Ríos , J. Raggio , S. Pérez-Ortega , M. Vivas , A. Pintado , T. G. A. Green , C. Ascaso & L. G. Sancho (2011) Anatomical, morphological and ecophysiological strategies in Placopsis pycnotheca (lichenized fungi, Ascomycota) allowing rapid colonization of recently deglaciated soils. Flora 206: 857864.

S. L. Elifio , M. De Lourdes , C. C. Da Silva , M. Iacomini & P. A. J. Gorini (2000) A lectin from the lichenized Basidiomycete Dictyonema glabratum. New Phytologist 148: 327334.

A. S. Feoktistov , A. V. Kitashov & E. S. Lobakova (2009) The characterization of lectins from the tripartite lichen Peltigera aphthosa (L.) Willd. Moscow University Biological Sciences Bulletin 64: 2327.

T. G. A. Green , J. Horstmann , H. Bonnett , A. Wilkins & W. B. Silvester (1980) Nitrogen fixation by members of the Stictaceae (lichenes) of New Zealand. New Phytologist 84: 339348.

T. G. A. Green , M. Schlensog , L. G. Sancho , J. B. Winkler , F. D. Broom , B. Schroeter (2002) The photobiont determines the pattern of photosynthetic activity within a single lichen thallus containing cyanobacterial and green algal sectors (photosymbiodeme). Oecologia 130: 191198.

D. L. Hawksworth & D. J. Hill (1984) The Lichen-forming Fungi. Glasgow and London: Blackie & Son Ltd.

A. Henssen & H. M. Jahns (1974) Lichenes. Stuttgart: Thieme Verlag.

J. D. Lawrey (1986) Biological role of lichen substances. Bryologist 89: 111122.

K. Lohtander , I. Oksanen & J. Rikkinen (2003) Genetic diversity of green algal and cyanobacterial photobionts in Nephroma (Peltigerales). Lichenologist 35: 325329.

R. Lücking , J. D. Lawry , M. Sikaroodi , P. M. Gillevet , J. L. Chaves , H. J. M. Sipman & F. Bungartz (2009) Do lichens domesticate photobionts like farmers domesticate crops? Evidence from a previously unrecognized lineage of filamentous cyanobacteria. American Journal of Botany 96: 14091418.

L. Myllys , S. Stenroos , A. Thell & M. Kuusinen (2007) High cyanobiont selectivity of epiphytic lichens in old growth boreal forest of Finland. New Phytologist 173: 621629.

S. Ott , K. Treiber & H.-M. Jahns (1993) The development of regenerative thallus structures in lichens. Botanical Journal of the Linnean Society 113: 6176.

P. Paulsrud , J. Rikkinen & P. Lindblad (2000) Spatial patterns of photobiont diversity in some Nostoc-containing lichens. New Phytologist 146: 291299.

P. Paulsrud , J. Rikkinen & P. Lindblad (2001) Field experiments on cyanobacterial specificity in Peltigera aphthosa. New Phytologist 152: 117123.

J. Rikkinen (2009) Relations between cyanobacterial symbionts in lichens and plants. Microbiology Monographs 8: 265270.

C. Scheidegger (1995) Early development of transplanted isidioid soredia of Lobaria pulmonaria in an endangered population. Lichenologist 27: 361374.

M. L. Trembley , C. Ringli & R. Honegger (2002) Morphological and molecular analysis of early stages in the resynthesis of the lichen Baeomyces rufus. Mycological Research 106: 768776.

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The Lichenologist
  • ISSN: 0024-2829
  • EISSN: 1096-1135
  • URL: /core/journals/lichenologist
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