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Drought and heat stress reduce yield and alter carbon rhizodeposition of different wheat genotypes
Bakhshandeh, Shiva1; Corneo, Paola E.1; Yin, Liming2; Dijkstra, Feike A.1
Corresponding AuthorBakhshandeh, Shiva(shiva.bakhshandeh@sydney.edu.au)
2019-04-01
Source PublicationJOURNAL OF AGRONOMY AND CROP SCIENCE
ISSN0931-2250
Volume205Issue:2Pages:157-167
AbstractDrought 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.
Keyworddrought plant-microbe interactions rhizodeposition root traits temperature wheat yield
Funding OrganizationGrains Research and Development Cooperation
DOI10.1111/jac.12314
Indexed BySCI
Language英语
Funding ProjectGrains Research and Development Cooperation[US00061]
WOS Research AreaAgriculture
WOS SubjectAgronomy
WOS IDWOS:000460766500004
PublisherWILEY
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/132159
Collection中国科学院金属研究所
Corresponding AuthorBakhshandeh, Shiva
Affiliation1.Univ Sydney, Sydney Inst Agr, Sch Life & Environm Sci, Sydney, NSW, Australia
2.Chinese Acad Sci, Inst Appl Ecol, Shenyang, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Bakhshandeh, Shiva,Corneo, Paola E.,Yin, Liming,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 Bakhshandeh, Shiva,Corneo, Paola E.,Yin, Liming,&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 Bakhshandeh, Shiva,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.
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