Differences in the physiological responses of Rht13 and rht wheat lines to short-term osmotic stress

doi:10.1007/s42976-020-00012-5

	Differences in the physiological responses of Rht13 and rht wheat lines to short-term osmotic stress
	Yan, J.2,3,4; Zhang, N.2,3,4; Wang, X.2,3,4; Zhang, S.1,3
刊名	CEREAL RESEARCH COMMUNICATIONS
	2020-03-01
卷号	48 期号:1 页码:41-47
关键词	Rht13 Wheat TaPIPs Root hydraulic conductance Osmotic stress
ISSN号	0133-3720
DOI	10.1007/s42976-020-00012-5
通讯作者	Yan, J.(himingse@163.com)
英文摘要	GA-insensitive dwarfing genes e.g. Rht-B1b and Rht-D1b have been widely used to reduce plant height, increase grain yield and improve harvest index values. GA-responsive dwarfing genes, such as Rht13, have potential for wheat improvement but are not used in commercial breeding. Here, a set of recombinant inbred lines (RILs) of varying height was developed from a cross of Rht13-containing Magnif M1 and Rht8-containing Jinmai 47. These RILs (Rht13 and rht) were used to evaluate the effects of Rht13 on wheat drought resistance under hydroponics conditions simulated by polyethylene glycol-6000 (10% PEG). Under osmotic stress, Rht13 seedlings showed significantly lower transpiration rates than rht lines. The Rht13 seedlings also had relatively higher photosynthetic rates and lower leaf water loss rates and higher leaf relative water content than rht lines. While investigating the reasons underlying these differences, we found that the Rht13 lines' root system could reduce the decrease in root hydraulic conductance (Lp) via osmotic adjustment and via modulating the expression of plasma membrane aquaporins (TaPIPs). Because of the reduced transpiration rate, severely reduced shoot water loss and improved water uptake ability of roots under short-term osmotic stress, the Rht13 seedlings maintained their overall water balance more effectively than did the rht seedlings. These findings demonstrate that the dwarfing allele is a potential candidate for wheat breeding programs aiming to improve performance in arid and semi-arid regions.
资助项目	National Natural Science Foundation of China[31960223] ; National Science-Technology Supporting Projects[2015BAD22B01]
WOS关键词	ROOT-SOURCED SIGNALS ; WATER-UPTAKE ; DWARFING GENES ; HYDRAULIC CONDUCTIVITY ; DROUGHT TOLERANCE ; CHROMOSOME PLOIDY ; AGRONOMIC TRAITS ; GROWTH ; HEIGHT ; BREAD
WOS研究方向	Agriculture
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000522608600001
资助机构	National Natural Science Foundation of China ; National Science-Technology Supporting Projects
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/133638]
专题	中国科学院地理科学与资源研究所
通讯作者	Yan, J.
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Yulin Univ, Shaanxi Key Lab Ecol Restorat Shanbei Min Area, Yulin 719000, Shaanxi, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yan, J.,Zhang, N.,Wang, X.,et al. Differences in the physiological responses of Rht13 and rht wheat lines to short-term osmotic stress[J]. CEREAL RESEARCH COMMUNICATIONS,2020,48(1):41-47.
APA	Yan, J.,Zhang, N.,Wang, X.,&Zhang, S..(2020).Differences in the physiological responses of Rht13 and rht wheat lines to short-term osmotic stress.CEREAL RESEARCH COMMUNICATIONS,48(1),41-47.
MLA	Yan, J.,et al."Differences in the physiological responses of Rht13 and rht wheat lines to short-term osmotic stress".CEREAL RESEARCH COMMUNICATIONS 48.1(2020):41-47.