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Modern hexaploid wheat differs from diploid and tetraploid ancestors in the importance of stress tolerance versus stress avoidance
P. F. Li1; B. L. Ma2; Y. C. Xiong3; Ma, BL (reprint author), Agr & Agri Food Canada, Ottawa Res & Dev Ctr, Ottawa, ON K1A 0C6, Canada.; Xiong, YC (reprint author), Lanzhou Univ, Sch Life Sci, Inst Arid Agroecol, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China.
SubtypeArticle
2018
Source PublicationCROP & PASTURE SCIENCE
ISSN1836-0947
description.correspondentemailbaoluo.ma@agr.gc.ca ; xiongyc@lzu.edu.cn
Volume69Issue:3Pages:265-277
AbstractCombined high temperature and weak radiation stress negatively influences wheat production. However, related eco-physiological mechanisms across wheat species of different genetic backgrounds are not well documented. A pot-culture experiment was conducted in growth chambers to analyse the prevailing strategies of wheat genotypes with different ploidy levels under combined high temperature and weak radiation (30 degrees C-25 degrees C, 200 mu molm(-2) s(-1) photosynthetically active radiation (PAR)) stress compared with normal growth conditions (20 degrees C-15 degrees C; 400 mu molm(-2) s(-1) PAR). The diploid and tetraploid wheat genotypes showed better avoidance ability to high temperature and weak radiation stress than the hexaploids. These diploids and tetraploids produced high vegetative biomass under control conditions but this was reduced substantially under the stress. The adaptive response to avoid the stress was a strong reduction in vegetative organs, mainly leaf area. Consequently, these genotypes produced lower yields. By contrast, modern hexaploid wheat varieties displayed a stronger tolerance to the stress and produced higher yields through greater green leaf area, higher relative leaf water content, and higher proline and soluble sugar contents. The relative importance of these tolerance and avoidance strategies was estimated to account for 60% and 22%, respectively, of the variations in grain yield. Our study demonstrated that modern hexaploid wheat has acquired a greater proportion of tolerance rather than avoidance strategy in response to high temperature and weak radiation stress.
KeywordAdaptation Mechanisms Physiological Traits Wheat Ploidy
Subject AreaAgriculture
DOI10.1071/CP17224
Indexed BySCI
Publication PlaceUNIPARK, BLDG 1, LEVEL 1, 195 WELLINGTON RD, LOCKED BAG 10, CLAYTON, VIC 3168, AUSTRALIA
Language英语
WOS IDWOS:000426677900003
PublisherCSIRO PUBLISHING
Funding OrganizationDoctoral Scientific Research Foundation of North-west AF University [2452015338] ; Doctoral Scientific Research Foundation of North-west AF University [2452015338] ; Fundamental Research Funds for the Central Universities [2452017187] ; Fundamental Research Funds for the Central Universities [2452017187] ; Natural Science Foundation of China [31570415] ; Natural Science Foundation of China [31570415] ; State Technology Support Program [2015BAD22B04] ; State Technology Support Program [2015BAD22B04] ; Overseas Master Program of Ministry of Education [Ms2011LZDX059] ; Overseas Master Program of Ministry of Education [Ms2011LZDX059]
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Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8297
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorMa, BL (reprint author), Agr & Agri Food Canada, Ottawa Res & Dev Ctr, Ottawa, ON K1A 0C6, Canada.; Xiong, YC (reprint author), Lanzhou Univ, Sch Life Sci, Inst Arid Agroecol, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China.
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
2.Agr & Agri Food Canada, Ottawa Res & Dev Ctr, Ottawa, ON K1A 0C6, Canada
3.Lanzhou Univ, Sch Life Sci, Inst Arid Agroecol, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation
GB/T 7714
P. F. Li,B. L. Ma,Y. C. Xiong,et al. Modern hexaploid wheat differs from diploid and tetraploid ancestors in the importance of stress tolerance versus stress avoidance[J]. CROP & PASTURE SCIENCE,2018,69(3):265-277.
APA P. F. Li,B. L. Ma,Y. C. Xiong,Ma, BL ,&Xiong, YC .(2018).Modern hexaploid wheat differs from diploid and tetraploid ancestors in the importance of stress tolerance versus stress avoidance.CROP & PASTURE SCIENCE,69(3),265-277.
MLA P. F. Li,et al."Modern hexaploid wheat differs from diploid and tetraploid ancestors in the importance of stress tolerance versus stress avoidance".CROP & PASTURE SCIENCE 69.3(2018):265-277.
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