Effects of External Potassium (K) Supply on Drought Tolerances of Two Contrasting Winter Wheat Cultivars

doi:10.1371/journal.pone.0069737

	Effects of External Potassium (K) Supply on Drought Tolerances of Two Contrasting Winter Wheat Cultivars
	Wei, Jiguang 2; Li, Caihong 2; Li, Yong 2; Jiang, Gaoming; Cheng, Guanglei 3; Zheng, Yanhai 1
	2013
发表期刊	PLOS ONE
ISSN	1932-6203
卷号	8 期号:7
摘要	Background: Drought is a common stress limiting crops growth and productivities worldwide. Water deficit may increase cellular membrane permeability, resulting in K outflow. Internal K starvation may disorder plant metabolism and limit plant growth. However, it is seldom reported about the effects of external K on drought tolerance of contrasting wheat cultivars. Methodology/Principal Findings: A hydroponics experiment was carried out in a non-controlled greenhouse. Seedlings of drought-tolerant SN16 and intolerant JM22 were simultaneously treated by five levels of K2CO3 (0, 2.5, 5, 7.5, 10 mM) and two levels of PEG6000 (0, 20%) for 7 days. External K2CO3 significantly increased shoot K+ content, water potential, chlorophyll content as well as gas exchange, but decreased electrolyte leakage (EL) and MDA content in both cultivars under PEG6000 stress. Antioxidant enzymes activities were up-regulated by PEG6000 while external K2CO3 reduced those changes. Molecular basis was explained by measuring the expression levels of antioxidant enzymes related genes. Shoot and root biomass were also increased by K2CO3 supply under drought stress. Although adequate K2CO3 application enhanced plant growth for both cultivars under drought stress, SN16 was better than JM22 due to its high drought tolerance. Conclusions/Significance: Adequate external K may effectively protect winter wheat from drought injuries. We conclude that drought-tolerant wheat combined with adequate external K supply may be a promising strategy for better growth in arid and semi-arid regions.
学科领域	Multidisciplinary Sciences
DOI	10.1371/journal.pone.0069737
收录类别	SCI
语种	英语
WOS关键词	TRITICUM-AESTIVUM L. ; OXIDATIVE DAMAGE ; OSMOTIC-STRESS ; SALT TOLERANCE ; WATER-DEFICIT ; RESPONSES ; SALINITY ; SODIUM ; PHOTOSYNTHESIS ; NUTRITION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000321765300081
出版者	PUBLIC LIBRARY SCIENCE
文献子类	Article
出版地	SAN FRANCISCO
资助机构	State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau ; State Key Laboratory of Crop Biology at Shandong Agricultural University ; National Natural Science Foundation of China(National Natural Science Foundation of China (NSFC)) ; Key Laboratory of Crop Water Physiology and Drought-tolerance Germplasm Improvement, Ministry of Agriculture, P. R. China
作品OA属性	Green Published, Green Submitted, gold
引用统计	被引频次：41[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/27823
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Beijing Acad Agr & Forestry Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wei, Jiguang,Li, Caihong,Li, Yong,et al. Effects of External Potassium (K) Supply on Drought Tolerances of Two Contrasting Winter Wheat Cultivars[J]. PLOS ONE,2013,8(7).
APA	Wei, Jiguang,Li, Caihong,Li, Yong,Jiang, Gaoming,Cheng, Guanglei,&Zheng, Yanhai.(2013).Effects of External Potassium (K) Supply on Drought Tolerances of Two Contrasting Winter Wheat Cultivars.PLOS ONE,8(7).
MLA	Wei, Jiguang,et al."Effects of External Potassium (K) Supply on Drought Tolerances of Two Contrasting Winter Wheat Cultivars".PLOS ONE 8.7(2013).

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