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Anatomical, morphological and ecophysiological strategies in
Details of Research
Title
Anatomical, morphological and ecophysiological strategies in Placopsis pycnotheca (lichenized fungi, Ascomycota) allowing rapid colonization of recently deglaciated soils
Abstract
The 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 Details
CSIC, 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
Details
1st Author
De los Ríos, A.
Author
De los Ríos, A.
Raggio, J.
Pérez-Ortega, S.
Vivas, M.
Pintado, A.
Green, T.
Ascaso, C.
Sancho, L.
Year
2011
Journal
Flora: Morphology, Distribution, Functional Ecology of Plants
Volume
206
Number
10
Pages
857-864
DOI
10.1016/j.flora.2011.05.002
URL
https://www.scopus.com/inward/recor.....aa65400f4f5a6ee85a6615398
Keywords
anatomy
bare soil
colonization
ecophysiology
electron microscopy
fungus
gas exchange
green alga
lichen
morphology
nitrogen fixation
photosynthesis
polymer
soil crust
soil ecosystem
soil microorganism
soil stabilization, Chile
Isla Grande de Tierra del Fuego
Tierra del Fuego [(ARC) South America], algae
Ascomycota
Chlorophyta
Fungi
Placopsis pycnotheca
Author Keywords
Anatomy
Cephalodia
Gas exchange
Nitrogen fixation
Receding glaciers
Soil crust
Terricolous lichen
Other
Citation
De 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
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Sancho, L.,
Anatomical, morphological and ecophysiological strategies in
. Antarctica NZ, accessed 01/08/2026, https://adam.antarcticanz.govt.nz/nodes/view/64163, 10.1016/j.flora.2011.05.002
