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水杨酸和盐浸种对香稻和非香稻幼苗生理特性的影响

DOI: 10.7668/hbnxb.2014.05.029, PP. 168-174

Keywords: 香稻,,水杨酸,2-AP,生理特性

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Abstract:

为探明水杨酸和盐对香稻和非香稻幼苗生理特性的影响,以香稻品种农香18和非香稻品种华航丝苗为材料,设置水杨酸(SA)0,1mmol/L和盐(NaCl)0,50mmol/L浸种处理,测定了幼苗叶片和茎鞘超氧化物超化酶(SOD)活性、过氧化物酶(POD)活性、丙二醛(MDA)含量、可溶性蛋白含量、脯氨酸含量及香稻香气2-AP含量。SA、盐以及两者的混合溶液浸后,香稻2-AP含量均显著增加。1mmol/L水杨酸与50mmol/L盐混合溶液处理显著提高香稻幼苗脯氨酸含量而对非香稻品种无显著影响;50mmol/L盐溶液处理可显著提高香稻和非香稻幼苗茎鞘POD活性及香稻幼苗茎鞘SOD活性;1mmol/L水杨酸处理显著提高香稻和非香稻幼苗叶片脯氨酸含量及香稻幼苗POD活性。SOD、脯氨酸和POD是水稻幼苗响应水杨酸和盐浸种处理的主要生理特性指标。盐胁迫下香稻2-AP含量增加,SA可缓解盐胁迫,同时可提高香稻2-AP含量。

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