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外源6-BA对缺镁胁迫下两优培九幼苗的缓解效应
杨艳华;陈国祥;刘少华;王娜;王贵民;吕川根
1.南京师范大学生命科学学院;2.江苏省农业科学院粮食与作物研究所 江苏南京 210097;3.江苏南京 210097;4.江苏南京 210014
摘要:
以三叶一心期的两优培九幼苗为材料,比较研究了缺镁及叶面喷施6-BA对缺镁胁迫下两优培九叶绿素含量、超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、硝酸还原酶(NR)活性,可溶性蛋白含量及细胞膜透性的影响。结果表明:随着两优培九缺镁胁迫程度的加剧,叶绿素含量、可溶性蛋白含量呈下降趋势,SOD、POD、CAT活性呈现先上升后下降的趋势,而细胞膜透性、NR活性则呈现升高的趋势;喷施6-BA对缺镁胁迫具有一定程度的缓解作用。因而可推测外源6-BA可在一定程度上改善由于缺镁而造成的营养缺乏症。
关键词:  镁    水稻    6-BA    胁迫
DOI:
分类号:
Fund project:江苏省资源生物技术重点实验室开放课题资助项目(KJS01036)
Abstract:
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