Anatomical, morphological and ecophysiological strategies in
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TitleAnatomical, morphological and ecophysiological strategies in Placopsis pycnotheca (lichenized fungi, Ascomycota) allowing rapid colonization of recently deglaciated soilsAbstractThe green algal lichen Placopsis pycnotheca was identified at Pia and Marinelli glaciers (Isla Grande of Tierra de Fuego, Chile) as a primary colonizer of bare soil in areas close to the front of the glacier or around small ponds created after glacier retreatment. Electron microscopy study showed that P. pycnotheca formed a thick hypothallus within which hyphae and their extracellular polymeric substances bind numerous soil particles. This structure augments water holding and soil stabilization capacities and constitutes an early stage in soil crust development. In addition, numerous cephalodia are formed within the hypothallus and subsequently develop upwards towards the thallus surface, sometimes before the formation of squamules with green algae. These anatomical and morphological strategies together with physiological properties such as the long photosynthetic activity period (measured in the laboratory) help explain its pioneering role as a colonizer and its apparently high growth rate. © 2011 Elsevier GmbH.Funding DetailsCSIC, Comisión Sectorial de Investigación CientÃfica; ICA, Interstitial Cystitis Association; MICINN, Ministerio de Ciencia e Innovación; CSIR, Council for Scientific and Industrial Research; CTM2009-12838-CO4-03, UMAG, Universidad de Magallanes; CTM2009-12838-CO4-01, UMAG, Universidad de Magallanes
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1st AuthorDe los Ríos, A. AuthorDe los Ríos, A.Raggio, J.Pérez-Ortega, S.Vivas, M.Pintado, A.Green, T.Ascaso, C.Sancho, L.Year2011JournalFlora: Morphology, Distribution, Functional Ecology of PlantsVolume206Number10Pages857-864DOI10.1016/j.flora.2011.05.002URLhttps://www.scopus.com/inward/recor.....aa65400f4f5a6ee85a6615398Keywordsanatomybare soilcolonizationecophysiologyelectron microscopyfungusgas exchangegreen algalichenmorphologynitrogen fixationphotosynthesispolymersoil crustsoil ecosystemsoil microorganismsoil stabilization, ChileIsla Grande de Tierra del FuegoTierra del Fuego [(ARC) South America], algaeAscomycotaChlorophytaFungiPlacopsis pycnothecaAuthor KeywordsAnatomyCephalodiaGas exchangeNitrogen fixationReceding glaciersSoil crustTerricolous lichen
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CitationDe los RÃos, A., Raggio, J., Pérez-Ortega, S., Vivas, M., Pintado, A., Green, T., Ascaso, C. and Sancho, L. (2011). Anatomical, morphological and ecophysiological strategies in Placopsis pycnotheca (lichenized fungi, Ascomycota) allowing rapid colonization of recently deglaciated soils. Flora: Morphology, Distribution, Functional Ecology of Plants, 206(10):857-864
Sancho, L., Anatomical, morphological and ecophysiological strategies in . Antarctica NZ, accessed 24/05/2025, https://adam.antarcticanz.govt.nz/nodes/view/64163, 10.1016/j.flora.2011.05.002