紫穗槐和刺槐种子萌发过程中内源激素含量及相关酶活性的动态变化

研究了紫穗槐(AmorphafrutiicosaL.)和刺槐(RobiniapseudoacaciaL.)种子萌发过程中内源激素含量和几种相关酶活性的动态变化,结果表明:紫穗槐种子播于培养皿第2d发芽率开始逐步增加,刺槐种子播于培养皿第4d发芽率开始迅速增加,4.5d时超过紫穗槐;紫穗槐和刺槐种子萌发过程中ZR含量变化较小,GA、IAA含量变化趋势大体相似;在播种后第5d,紫穗槐种子ABA含量开始下降,而刺槐种子ABA含量继续上升,这与2种植物种子发芽率变化呈现明显的相关性。2种种子萌发过程中的淀粉酶活性、过氧化氢酶活性的变化趋势一致,但刺槐种子萌发5d之后过氧化物酶活性呈现明显的升高趋势,而紫穗槐种子萌发5d之后过氧化物酶活性仍然保持平稳不变,这种变化趋势与相应的发芽率变化呈现明显相关性。

Dynamic Changes of Some Endogenous Hormone Content and Activities of Some Related Enzymes During the Germination of Seeds of Amorpha frutiicosa L. and Robinia pseudoacacia L.

Dynamic changes of some endogenous hormone content and activities of some related enzymes during the germination of the seeds of Amorpha frutiicosa L. and Robinia pseudoacacia L. is described.The results are as follows:the germination rate of the seed of Amorpha frutiicosa L. rises gradually since the second day after planted in Petri dishes. The germination rate of the seed of Robinia pseudoacacia L. rises quickly since the fourth day and exceeds t Amorpha frutiicosa L. since the 4.5 day.The content of zeatin riboside keeps stable during the germination, the changes of the contents of gibberellin and indole acetic acid have the same trends; The content of abscisic acid of Amorpha frutiicosa L. starts to fall after five days since its germination, while the content of abscisic acid in Robinia pseudoacacia L. starts to rise. The change of content of abscisic acid is related with the change of germination rate of the seeds of Amorpha frutiicosa L. and Robinia pseudoacacia L..The changes of activities of amylase and catalase during the germination have the same trend. Activity of peroxidase of the seed of Robinia pseudoacacia L. begins to rise after five days since its germination while the activity of peroxidase of the seed of Amorpha frutiicosa L. keeps stable, and the changes have relationship with the changes of germination rate.