| 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 Author | Bakhshandeh, Shiva(shiva.bakhshandeh@sydney.edu.au) |
| 2019-04-01 | |
| Source Publication | JOURNAL OF AGRONOMY AND CROP SCIENCE
 |
| ISSN | 0931-2250 |
| Volume | 205Issue:2Pages:157-167 |
| Abstract | 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. |
| Keyword | drought plant-microbe interactions rhizodeposition root traits temperature wheat yield |
| Funding Organization | Grains Research and Development Cooperation |
| DOI | 10.1111/jac.12314 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Grains Research and Development Cooperation[US00061] |
| WOS Research Area | Agriculture |
| WOS Subject | Agronomy |
| WOS ID | WOS:000460766500004 |
| Publisher | WILEY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/132159 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Bakhshandeh, Shiva |
| Affiliation | 1.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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