caa a22 4500 465763820 CHVBK 20180323111907.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF00237820 doi (NATIONALLICENCE)springer-10.1007/BF00237820 Wilson M. School of Biological Sciences, Macquarie University, 2109, NSW, Australia aut Morphology and photosynthetic physiology of Grimmia antarctici from wet and dry habitats [Elektronische Daten] [M. Wilson] Summary: Photosynthetic capacity, chlorophyll content and leaf and cell morphology were compared in Grimmia antarctici from wet and dry sites in the Bailey Peninsula SSSI, near Casey Station, East Antarctica. In wet sites G. antarctici grew as a turf with tall shoots of loosely packed long leaves: in very dry sites it formed small cushions with short shoots of small tightly packed leaves. Intermediate forms (large cushions) were also frequently observed in less extreme situations. Cell size and number were greater in drier sites. The chlorophyll content, chlorophyll a/b ratio and the light saturated photosynthetic and dark respiration rates at full turgor and under enhanced conditions of CO2 were the same. This rules out a direct effect of water stress on the integrity of the photosynthetic apparatus and implies that the cushion form is a product of direct effects of water availability on cell division and differentiation and CO2 assimilation under field conditions. Springer-Verlag, 1990 Polar Biology Springer-Verlag 10/5(1990-05-01), 337-341 0722-4060 10:5<337 1990 10 300 https://doi.org/10.1007/BF00237820 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00237820 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Wilson M. School of Biological Sciences, Macquarie University, 2109, NSW, Australia aut NATIONALLICENCE 773 0- Polar Biology Springer-Verlag 10/5(1990-05-01), 337-341 0722-4060 10:5<337 1990 10 300 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer