摘要
为了探明缺磷水稻根系保护酶活性与活性氧代谢的关系,为水稻高产提供理论依据,采用水培法,研究缺磷24h和48h对水稻幼苗活性氧代谢及抗氧化酶活性的影响。结果表明:1)在缺磷处理下红良优166和Ⅱ优3027的总根长度和活性氧含量增加。2)红良优166的超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性持续上升,在缺磷48h时达最高;Ⅱ优3027的SOD活性在缺磷48h时最高,POD和CAT活性在缺磷24h时最高,随后下降。因此,缺磷可促进水稻根系生长,诱发氧化胁迫产生,抗氧化酶活性的上升即是对缺磷胁迫的一种应答。
A solution culture experiment was conducted to investigate the effects of phosphorus deficiency on active oxygen metabolism and antioxidant enzyme activity in rice seedlings,so as to explore the relationship between protective enzyme activity and active oxygen metabolism.Results： 1） The total root length and active oxygen content both in Hong liangyou-166 and Ⅱ you-3027 increased under phosphorus deficiency.2） The superoxide dismutase（SOD）,peroxidase（POD） and catalase（CAT） activity in roots of Hong liangyou-166 continued to increase,and reached the maximum for 48 h.The SOD activity in roots of Ⅱ you-3027 reached the maximum after phosphorus deficiency treatment for 48 h,POD and CAT activity reached the maximum for 24 h.The results suggested that phosphorus deficiency promoted the root growth and induced the oxidative stress,and the increase of antioxidant enzyme activity was in accordance with defense response to phosphorus deficiency.
出处
《贵州农业科学》
CAS
北大核心
2013年第3期27-29,共3页
Guizhou Agricultural Sciences
基金
浙江省自然科学基金项目"磷饥饿诱导形成的水稻根表铁膜与铝的作用机制研究"(Y3110561)
关键词
水稻
缺磷
活性氧
抗氧化酶
rice
phosphorus deficiency
active oxygen
antioxidant enzyme
