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
CLIMATE-CHANGE CONDITIONS
; ELEVATED CO2
; NIGHT TEMPERATURE
; QUALITY RESPONSES
; CARBON-DIOXIDE
; YIELD
; ENRICHMENT
; PHOTOSYNTHESIS
; PRODUCTIVITY
; ASSIMILATION
WOS学科分类:
Plant Sciences
WOS研究方向:
Plant Sciences
英文摘要:
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 mu mol mol(-1)) and warming (+2 degrees 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.
1.Nanjing Agr Univ, Inst Resource Ecosyst & Environm Agr, 1 Weigang, Nanjing 210095, Jiangsu, Peoples R China 2.Nanjing Agr Univ, Ctr Climate Change & Agr, 1 Weigang, Nanjing 210095, Jiangsu, Peoples R China 3.Natl Agr & Food Res Org, Tohoku Agr Res Ctr, Morioka, Iwate 0200198, Japan 4.Univ Melbourne, Fac Vet & Agr Sci, Sch Agr & Food, Parkville, Vic 3010, Australia 5.Fujian Normal Univ, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Fujian, Peoples R China
Recommended Citation:
Wang, Jianqing,Hasegawa, Toshihiro,Li, Lianqing,et al. 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[J]. NEW PHYTOLOGIST,2019-01-01,222(2):726-734