期刊
NEW PHYTOLOGIST
卷 223, 期 2, 页码 520-529出版社
WILEY
DOI: 10.1111/nph.15828
关键词
anaplerosis; ethylene; nitrogen assimilation; photorespiration; photosynthesis; respiration
资金
- Australian Research Council through a Future Fellow grant [FT140100645]
Net photosynthetic assimilation in C-3 plants is mostly viewed as a simple balance between CO2 fixation by Rubisco-catalyzed carboxylation and CO2 production by photorespiration (and to a lower extent, by day respiration) that can be easily manipulated during gas exchange experiments using the CO2 : O-2 ratio of the environment. However, it now becomes clear that it is not so simple, because the photosynthetic response to gaseous conditions involves 'ancillary' metabolisms, even in the short-term. That is, carbon and nitrogen utilization by pathways other than the Calvin cycle and the photorespiratory cycle, as well as rapid signaling events, can influence the observed rate of net photosynthesis. The potential impact of such ancillary metabolisms is assessed as well as how it must be taken into account to avoid misinterpretation of photosynthetic CO2 response curves or low O-2 effects in C-3 leaves.
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