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Changes in grain protein and amino acids composition of wheat and rice under short-term increased CO₂ and temperature of canopy air in a paddy from East China
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Changes in grain protein and amino acids composition of wheat and rice under short-term increased CO₂ and temperature of canopy air in a paddy from East China
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Journal Article
Changes in grain protein and amino acids composition of wheat and rice under short-term increased CO₂ and temperature of canopy air in a paddy from East China
2019
Overview
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 mo−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.
Publisher
Wiley,Wiley Subscription Services, Inc
Subject
