| 王玉凤,王庆祥,商丽威.钙对NaCl 胁迫下玉米幼苗保护酶活性等生理特性的影响[J].干旱地区农业研究,2008,(3):119~123 |
| 钙对NaCl 胁迫下玉米幼苗保护酶活性等生理特性的影响 |
| Effect of calcium on protective enzymes activeness and physiological characteristics of maize seedlings under salt stress |
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| DOI：10.7606/j.issn.1000-7601.2008.03.24 |
| 中文关键词: 钙 盐胁迫 玉米幼苗 保护酶活性 膜透性 |
| 英文关键词:calcium salt stress maize protective enzymes activeness membrane permeability |
| 基金项目: |
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| 中文摘要: |
| 采用水培法研究了不同浓度钙对盐胁迫下玉米幼苗生长、叶绿素含量、游离氨基酸含量及保护酶活性等生理特性的影响。结果表明适量的Ca2+(4 mmol/L)供应能有效促进玉米生长,抑制叶绿素含量降低,降低细胞膜透性,提高玉米叶片和根系中的SOD和POD活性,随着Ca2+浓度增加根系中CAT活性增加,叶片CAT活性有所下降。增加Ca2+浓度,根系中游离氨基酸含量和可溶性蛋白含量呈现出先升高(24 mmol/L)后降低(6mmol/L)趋势,叶片中可溶性蛋白含量随Ca2+浓度增加而降低。表明适量的Ca2+供应可提高玉米幼苗耐盐性。 |
| 英文摘要: |
| A solution culture was conducted to study the effect of Ca2+ on the growth of maize seedlings chlorophyll content free amino acids content the activeness of several protective enzymes and other physiological characteristics．The results show that the Ca2+ concentration at 4mmol／L could obviously increase plant growth and restrain the decrease of chlorophyll content reduced permeability of cell membrane and enhance SOD and POD activity in leaves and roots．With the increase of Ca2+ concentration the CAT activeness in roots was increased but that in leaves was decreased．The free amino acids and soluble protein content in roots increased in terms of2～4mmol／L of Ca2+ concentration but decreased in that of 6mmol／L．Soluble protein in leaves was decreased with the increase of Ca2+ concentration．The above results suggested that the appropriate Ca2+ supply can enhance the salt tolerance in maize growing in salt stress. |
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