外源一氧化氮对PEG6000水分胁迫下小麦幼苗生理特性的影响

采用10%的聚乙二醇6000对小麦幼苗根部进行轻度水分胁迫处理,并通过添加不同浓度的一氧化氮供体硝普钠(SNP),研究外源NO处理对水分胁迫下小麦幼苗生理特性的影响.结果表明,0.05 mM SNP能显著降低水分胁迫下小麦幼苗丙二醛(MDA)含量和超氧自由基(O2-)产生速率,但能显著增加小麦幼苗叶绿素a,类胡萝卜素、叶绿素(a+b)含量及株高、根长、叶面积和干重.表明外源0.05 mM SNP处理对水分胁迫下小麦幼苗具有明显的保护作用,可以促进植株生长.

Effect of Exogenous Nitric Oxide on Physiological Characteristics in Wheat Seedlings under Water Stress

In order to determine the effect of exogenous nitric oxide on seedlings physiological characteristics of wheat under water stress,wheat(Triticum aestivum L.) seedlings root have been treated with 10% PEG6000 solution in combination with different concentrations(0.01 mM,0.05 mM and 0.1 mM) of exogenous nitric oxide donor sodium nitroprusside(SNP).The results show that the MDA concentration and the production rate of O-2 in wheat seedlings under water stress are alleviated by 0.05 mM SNP,while the content of chlorophyll a,carotenoids,chlorophyll(a+b) and plant height,root length,leaf area and dry weight have increased.The results suggest that the treatment of 0.05 mM SNP can protect wheat seedlings and accelerated the seedlings growth.