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H_2O_2对水稻幼苗生长和生理的调节 被引量:11

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摘要 用水稻(Oryza sativa L.)中花11号分析了0.06%、0.006%、0.000 6%H_2O_2处理5 d对水稻幼苗生长、H_2O_2产生、细胞死亡及生长素积累分布的影响。结果表明,高浓度H_2O_2(0.06%)抑制地上部分和不定根的伸长及不定根上侧根的形成和生长,但对初生根上的侧根生长无明显影响。低浓度(0.000 6%)H_2O_2促进初生根和不定根的伸长及其侧根数量增多和长度增加。根尖H_2O_2积累和细胞死亡随着H_2O_2浓度的增大而增加。利用DR5-GUS转基因水稻分析显示高浓度H_2O_2促进生长素在根尖的过量积累,本试验条件下H_2O_2对生长素积累和分布的调节与其激活转录有关。由此可见,高浓度H_2O_2对水稻幼苗生长的抑制作用与其诱导细胞死亡及生长素过度积累有密切关系。
出处 《江苏农业科学》 北大核心 2016年第3期74-77,共4页 Jiangsu Agricultural Sciences
基金 山东省自然科学基金(编号:ZR2014DM010 ZR2015CL009) 山东省淄博市科技发展计划(编号:111089 113106)
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二级参考文献29

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