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当前位置: 首页 > 文章 > 钠盐胁迫对小麦叶片核酸损伤和多胺积累的影响 农业环境科学学报 2004,23 (03) 428-431
Position: Home > Articles > Effects of Sodium Salt on Polyamines Accumulation and Detriments of Nucleic Acid in Wheat Leaves Journal of Agro-Environment Science 2004,23 (03) 428-431

钠盐胁迫对小麦叶片核酸损伤和多胺积累的影响

作  者：
谈建康;安树青
单  位：
南京大学生命科学学院;南京大学环境学院
关键词：
钠盐;小麦;核酸;核酸酶;多胺
摘  要：
采用室内培养、测定方法研究不同浓度的NaCl,Na2SO4和Na2CO3胁迫对小麦(Triticumaestvum)叶片H2O2、核酸代谢和多胺影响。结果表明,在钠盐胁迫下H2O2含量随着胁迫浓度的增加而增加,其中Na2CO3胁迫下H2O2含量增加最显著。核酸含量随着胁迫浓度的增加而减少,且RNA含量变化明显大于DNA,而核酸酶的活性在低浓度胁迫下升高,高浓度胁迫下降低,证实钠盐胁迫主要影响核酸的合成,其中对小麦叶片RNA的影响明显大于对DNA的影响。多胺亦随之积累,Na2CO3胁迫下多胺积累最显著,且变化量为腐胺(Put)>精胺(Spm)>亚精胺(Spd);高钠盐胁迫下多胺积累不明显,其中腐胺在200mmol·L-1下反而减少。
译  名：
Effects of Sodium Salt on Polyamines Accumulation and Detriments of Nucleic Acid in Wheat Leaves
作  者：
TAN Jian kang1, AN Shu qing2(1.Environmental Science College, Nanjing University, Nanjing 210093, China; 2. Biological Science College, Nanjing University, Nanjing 210093, China)
关键词：
sodium salt; wheat; nucleic acid; nuclease; polyamine
摘  要：
Sodium salt stress effects on Wheat( Triticum aestvum) were studied. The content of H2O2, nucleic acid metabolism and polyamine accumulation in wheat leaves were measured under different concentrations of NaCl, Na2SO4 and Na2CO3. The content of H2O2 increased with the increase of the salt concentrations, and the effects of different salt were in an order: NaClDNA. The activities of nucleases reduced with the increase of the salt concentrations, but they rose under the low concentration stress. The effects on RNA were greater than those on DNA. The polyamines increased with the increase of the salt concentrations, and the order of the increased quantities was Put>Spm>Spd; while the Put contents showed no significant increases under sever stress of high sodium salt concentrations, but decreased under the treatment of 200 mmol· L- 1.

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