RT Journal Article
T1 Anatomical, morphological and ecophysiological strategies in Placopsis pycnotheca (lichenized fungi, Ascomycota) allowing rapid colonization of recently deglaciated soils
A1 Ríos, Asunción De los
A1 Raggio Quílez, José
A1 Pérez-Ortega, Sergio
A1 Vivas, Mercedes
A1 Pintado Valverde, Ana
A1 Green, Thomas George Allan
A1 Ascaso, Carmen
A1 García Sancho, Leopoldo
AB 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.
PB Elsevier
SN 0367-2530
YR 2011
FD 2011-10
LK https://hdl.handle.net/20.500.14352/93432
UL https://hdl.handle.net/20.500.14352/93432
LA eng
NO de los Ríos A, Raggio J, Pérez-Ortega S, Vivas M, Pintado A, Green TGA, Ascaso C, Sancho LG (2011) Anatomical, morphological and ecophysiological strategies in Placopsis pycnotheca (lichenized fungi, Ascomycota) allowing rapid colonization of recently deglaciated soils. Flora 206:857–864
NO Ministerio de Ciencia e Innovación, Gobierno de España
DS Docta Complutense
RD 1 sept 2024