期刊
FEBS LETTERS
卷 586, 期 20, 页码 3692-3697出版社
WILEY
DOI: 10.1016/j.febslet.2012.08.027
关键词
Photosynthesis; Photorespiration; Glycine decarboxylase; H-Protein; Arabidopsis
资金
- Deutsche Forschungsgemeinschaft (Promics Photorespiration Network) [FOR 1186]
Photorespiration makes oxygenic photosynthesis possible by scavenging 2-phosphoglycolate. Hence, compromising photorespiration impairs photosynthesis. We examined whether facilitating photorespiratory carbon flow in turn accelerates photosynthesis and found that overexpression of the H-protein of glycine decarboxylase indeed considerably enhanced net-photosynthesis and growth of Arabidopsis thaliana. At the molecular level, lower glycine levels confirmed elevated GDC activity in vivo, and lower levels of the CO2 acceptor ribulose 1,5-bisphosphate indicated higher drain from CO2 fixation. Thus, the photorespiratory enzyme glycine decarboxylase appears as an important feed-back signaller that contributes to the control of the Calvin-Benson cycle and hence carbon flow through both photosynthesis and photorespiration. (C) 2012 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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