Effects of External Potassium (K) Supply on Drought Tolerances of Two Contrasting Winter Wheat Cultivars
文献类型：期刊论文
| 作者 | Wei, Jiguang3; Li, Caihong3; Li, Yong3; Jiang, Gaoming ; Cheng, Guanglei2; Zheng, Yanhai4
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| 刊名 | PLOS ONE
 |
| 出版日期 | 2013 |
| 卷号 | 8期号:7 |
| ISSN号 | 1932-6203 |
| DOI | 10.1371/journal.pone.0069737 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| 学科主题 | Multidisciplinary Sciences |
| 出版地 | SAN FRANCISCO |
| 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) |
| 语种 | 英语 |
| WOS记录号 | WOS:000321765300081 |
| 出版者 | PUBLIC LIBRARY SCIENCE |
| 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 |
| 源URL | [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.Beijing Acad Agr & Forestry Sci, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shanxi, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 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). |
入库方式： OAI收割
来源：植物研究所
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