Modern hexaploid wheat differs from diploid and tetraploid ancestors in the importance of stress tolerance versus stress avoidance

doi:10.1071/CP17224

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	Modern hexaploid wheat differs from diploid and tetraploid ancestors in the importance of stress tolerance versus stress avoidance
	Xiong, YC (reprint author), Lanzhou Univ, Sch Life Sci, Inst Arid Agroecol, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China.; Ma, BL (reprint author), Agr & Agri Food Canada, Ottawa Res & Dev Ctr, Ottawa, ON K1A 0C6, Canada.; Y. C. Xiong 3; B. L. Ma 2; P. F. Li 1
刊名	CROP & PASTURE SCIENCE
	2018
卷号	69 期号:3 页码:265-277
关键词	Adaptation Mechanisms Physiological Traits Wheat Ploidy
ISSN号	1836-0947
DOI	10.1071/CP17224
文献子类	Article
英文摘要	Combined 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.
学科主题	Agriculture
出版地	UNIPARK, BLDG 1, LEVEL 1, 195 WELLINGTON RD, LOCKED BAG 10, CLAYTON, VIC 3168, AUSTRALIA
语种	英语
出版者	CSIRO PUBLISHING
WOS记录号	WOS:000426677900003
资助机构	Doctoral 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] ; Doctoral 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]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/8297]
专题	水保所科研产出--SCI_2018--SCI
通讯作者	Xiong, YC (reprint author), Lanzhou Univ, Sch Life Sci, Inst Arid Agroecol, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China.; Ma, BL (reprint author), Agr & Agri Food Canada, Ottawa Res & Dev Ctr, Ottawa, ON K1A 0C6, Canada.
作者单位	1.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
推荐引用方式 GB/T 7714	Xiong, YC ,Ma, BL ,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	Xiong, YC ,Ma, BL ,Y. C. Xiong,B. L. Ma,&P. F. Li.(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	Xiong, YC ,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.