Photosynthetic temperature response of antarctic plant Deschampsia antarctica and of temperate region plant Deschampsia coespitosa

• Autorzy: Bystrzejewska G.
• Języki publikacji: EN

Abstrakty

EN

The photosynthetic temperature response of the Antarctic vascular plant Deschampsia antarctica from Arctowski Station and of Deschampsia coespitosa as a control plant from Poland was examined. We were particularly interested in the mechanisms responsible for functioning of photosynthesis at high temperatures (21-37 stopni C). In the leaves of intact plants CO2 gas exchange was measured at the light conditions (net photosynthesis and the CO2-compensation point). Estimation was made at the changing level of ^14C-metabolites of 10s-photosynthesis with ^14CO2: 3-phosphoglyceric acid + phosphosugars (the Calvin cycle metabolites) and amino acids: glycine + serine (the photorespiration path metabolites). The results indicate that the high temperature affects the net photosynthesis, CO2-compensation point and photosynthetic metabolites of D. antarctica. The enhanced photorespiration was at the expense of the photosynthetic Calvin-cycle function

Słowa kluczowe

EN

antarctic plants; Antarctica; Deschampsia antarctica; Deschampsia coespitosa; photorespiration; photosynthetic

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2001
• Tom: Vol. 49, nr 3
• Strony: 215--219
• Opis fizyczny: Bibliogr. 17 poz.,

Twórcy

autor

Bystrzejewska G.

• Isotope Laboratory, Faculty of Biology, University of Warsaw, 02-097 Warsaw, Miecznikowa 1, Poland

Bibliografia

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