Drought and heat stress reduce yield and alter carbon rhizodeposition of different wheat genotypes

doi:10.1111/jac.12314

	Drought and heat stress reduce yield and alter carbon rhizodeposition of different wheat genotypes
	Yin, Liming 1; Bakhshandeh, Shiva 2; Corneo, Paola E.2; Dijkstra, Feike A.2
刊名	JOURNAL OF AGRONOMY AND CROP SCIENCE
	2019-04-01
卷号	205 期号:2 页码:157-167
关键词	drought plant-microbe interactions rhizodeposition root traits temperature wheat yield
ISSN号	0931-2250
DOI	10.1111/jac.12314
英文摘要	Drought and high temperature are major environmental stress factors threatening wheat production during grain filling stage resulting in substantial yield losses. Four wheat genotypes (Suntop, IAW2013, Scout and 249) were planted under two temperature levels (25 and 30 degrees C) and two water levels (15% and 25% soil moisture content). Wheat yield, leaf delta C-13, plant rhizodeposition, shoot biomass and root traits were examined. Low moisture (drought stress) and high temperature (heat stress) decreased the grain yield of all wheat genotypes, in particular 249, while combined drought and temperature stresses had the most pronounced negative effect on plant biomass and grain yield. Decreasing soil water availability decreased the allocation of plant-derived C to soil organic carbon (SOC) and to microbial biomass through rhizodeposition. Leaf delta C-13 decreased with increased yield, suggesting that higher yielding genotypes were less water stressed and allocated less C to SOC and microbial biomass through rhizodeposition. Wheat genotypes with lower root/shoot ratios and thinner roots were more efficient at assimilating C to the grain, while genotypes with higher root/shoot ratios and thicker roots allocated more C belowground through rhizodeposition at the expense of producing higher yield. Therefore, improving these traits for enhanced C allocation to wheat grain under variable environmental conditions needs to be considered.
资助项目	Grains Research and Development Cooperation[US00061]
WOS研究方向	Agriculture
语种	英语
出版者	WILEY
WOS记录号	WOS:000460766500004
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123951]
专题	中国科学院沈阳应用生态研究所
通讯作者	Bakhshandeh, Shiva
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Shenyang, Liaoning, Peoples R China 2.Univ Sydney, Sydney Inst Agr, Sch Life & Environm Sci, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Yin, Liming,Bakhshandeh, Shiva,Corneo, Paola E.,et al. Drought and heat stress reduce yield and alter carbon rhizodeposition of different wheat genotypes[J]. JOURNAL OF AGRONOMY AND CROP SCIENCE,2019,205(2):157-167.
APA	Yin, Liming,Bakhshandeh, Shiva,Corneo, Paola E.,&Dijkstra, Feike A..(2019).Drought and heat stress reduce yield and alter carbon rhizodeposition of different wheat genotypes.JOURNAL OF AGRONOMY AND CROP SCIENCE,205(2),157-167.
MLA	Yin, Liming,et al."Drought and heat stress reduce yield and alter carbon rhizodeposition of different wheat genotypes".JOURNAL OF AGRONOMY AND CROP SCIENCE 205.2(2019):157-167.