| 甜菜碱不同预处理时间下小麦幼苗对PEG-6000模拟干旱的响应 |
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| 引用本文： | 杨淑慎,翁明阳,戴明,孙宾芳,山仑.甜菜碱不同预处理时间下小麦幼苗对PEG-6000模拟干旱的响应[J].水土保持研究,2008(6). |
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| 作者姓名： | 杨淑慎 翁明阳 戴明 孙宾芳 山仑 |
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| 作者单位： | 西北农林科技大学生命科学学院;中国科学院水土保持研究所黄土高原与旱地农业国家重点实验室; |
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| 基金项目： | 陕西省自然科学基金项目(2007C117) |
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| 摘 要： | 以小麦长武134为实验材料,于小麦长至两叶一心期时根施2.0 g/L甜菜碱,研究外源甜菜碱预处理不同时间(48 h,72 h,96 h)后对PEG-6000(-1.0 MPa)胁迫下小麦幼苗水分状况、游离脯氨酸含量、可溶性糖含量、可溶性蛋白含量、叶绿素含量、抗氧化酶活性、膜伤害程度的影响。结果表明外施甜菜碱可增强干旱条件下细胞的渗透调节能力,提高抗氧化酶的活性,减缓干旱胁迫诱导的细胞伤害,其中用2.0 g/L的甜菜碱预处理72 h效果相对较好。
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| 关 键 词： | 甜菜碱 小麦 PEG渗透胁迫 |
Response of the Osmotic Stress on the Wheat Seedlings Drought Resistance Under the Different time Betaine Pretreatment |
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| YANG Shu-shen,WENG Ming-yang,DAI Ming,SUN Bin-fang,SHAN Lun.Response of the Osmotic Stress on the Wheat Seedlings Drought Resistance Under the Different time Betaine Pretreatment[J].Research of Soil and Water Conservation,2008(6). |
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| Authors: | YANG Shu-shen WENG Ming-yang DAI Ming SUN Bin-fang SHAN Lun |
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| Institution: | YANG Shu-shen1,WENG Ming-yang1,DAI Ming1,SUN Bin-fang1,SHAN Lun2(1.College of Life Science,Northwest A & F University,Yangling,Shaanxi 712100,China,2.State Key Laboratory of Soil Erosion , Dryl, Farming on the Loess Plateau,Institute of Soil , Water Conservation,the Chinese Academy of Sciences,Shaanxi 712100 China) |
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| Abstract: | Effects of root-applied exogenous betaine(2.0 g/L) at different time(48 h,72 h,96 h) on the drought-tolerance of wheat(Changwu 134) seedlings under PEG-6000(-0.1 MPa) osmotic stress was examined,including the water status,Proline content,soluble sugars content,soluble protein content,chlorophyll content and the activities of antioxidant enzymes.The results showed that the exogenous betaine could promote the activities of membrane protecive enzymes,increase the content of the osmotically adjustive things,dec... |
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| Keywords: | betaine wheat PEG osmotic stress |
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