| 盐胁迫及外源Ca2+调控对甘薯生理特性的影响 |
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| 引用本文： | 刘伟.盐胁迫及外源Ca2+调控对甘薯生理特性的影响[J].中国农学通报,2014,30(24):111-117. |
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| 作者姓名： | 刘伟 |
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| 作者单位： | 福建省宁德市宁德师范学院 |
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| 基金项目： | 福建省科技计划重点项目“闽台两岸农业新兴产业合作与竞争力提升发展研究”（2012R0068）; 福建省高校新世纪人才资助项目（JK2011060） |
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| 摘 要： | 甘薯耐盐性较强,可作为开发利用盐渍地的作物,对其耐盐机理的研究具有一定的意义。对‘徐薯18’、‘栗子香’、‘胜利百号’3个甘薯品种进行盐胁迫及外源Ca2＋调控试验。盐胁迫下,甘薯叶片的总氮含量、叶绿素含量、DNA含量、RNA含量和RNA/DNA值都降低,游离氨基酸含量增加,脯氨酸迅速累积。外源Ca2＋处理后,同工酶种类和相对活性均较非钙处理有所增加,降低了叶片中的Na＋积累,延缓了质膜的损伤,提高了甘薯的耐盐性,且不同品种表现一致。为深入研究甘薯耐盐机理奠定了基础,同时为耐盐品种甘薯的选育及高产种植提供了理论依据。
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| 关 键 词： | 甘薯 耐盐性 生理指标 外源Ca2+调控 |
| 收稿时间： | 2014/2/10 0:00:00 |
| 修稿时间： | 2014/3/20 0:00:00 |
Effects on Physiological Characteristics of Ipomoea batatas Lam Under Salt Stress and Exogenous Ca2+ |
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| Institution: | Liu Wei, Wei Rifeng, Lai Jiandong, Sun Jun, Ke Yvqin, Pan Tingguo (1.Ningde Normal University, Ningde Fujian 352100; 2Fujian Agriculture and Forestry University, Fuzhou 350002) |
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| Abstract: | The salt tolerance of sweet potato was strong and it can be used in salt marsh development and utilization. In order to further study the salt-tolerance mechanism of Ipomoea batatas Lam, three cultivars, Xushu No 18, Lizixiang, and Shengli No 100 were used to investigate the physiological basis of salt-tolerance, and the effects after treated with Ca2+ were studied. The results showed that under salt stress, the contents of total N and Chl a, Chl b, DNA, RNA and RNA/DNA ratio in leaves were declined, free amino acid contents were increased, and praline was rapid accumulated. After treated with Ca2+, Na+ in leaves were declined, ability of salt-tolerance was increased, injury of plasma membrane was delayed, kinds and activities of isoenzyme were increased, three cultivars showed the same. This research would be helpful to the further study of salt-tolerance mechanism of Ipomoea batatas Lam, and probably provides basic theory for its breeding and high-yield plantation. |
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| Keywords: | exogenous Ca2+ |
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