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- Title
Changes in grain protein and amino acids composition of wheat and rice under short‐term increased [CO<sub>2</sub>] and temperature of canopy air in a paddy from East China.
- Authors
Wang, Jianqing; Hasegawa, Toshihiro; Li, Lianqing; Lam, Shu Kee; Zhang, Xuhui; Liu, Xiaoyu; Pan, Genxing
- Abstract
Summary: Projected global climate change is a potential threat for food security. Both rising atmospheric CO2 concentrations ([CO2]) and temperatures have significant impacts on crop productivity, but the combined effects on grain quality are not well understood.We conducted an open‐air field experiment to determine the impacts of elevated [CO2] (E‐[CO2], up to 500 μmol mol−1) and warming (+2°C) on grain yield, protein and amino acid (AAs, acid digests) in a rice–winter wheat rotation system for 2 yr.E‐[CO2] increased grain yield by 11.3% for wheat and 5.9% for rice, but decreased grain protein concentration by 14.9% for wheat and by 7.0% for rice, although E‐[CO2] slightly increased the ratio of essential to nonessential AAs. With a consistent decline in grain yield, warming decreased protein yield, notably in wheat, despite a smaller increase in protein concentration.These results indicate that warming could partially negate the negative impact by E‐[CO2] on grain protein concentration at the expense of grain yield; this tradeoff could not fully offset the negative effects of climate change on crop production.
- Subjects
GRAIN proteins; AMINO acid content of plants; EFFECT of atmospheric carbon dioxide on plants; PHYSIOLOGICAL effects of atmospheric temperature; COMPOSITION of wheat; COMPOSITION of rice; GRAIN yields; CLIMATE change
- Publication
New Phytologist, 2019, Vol 222, Issue 2, p726
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/nph.15661