过氧化氢参与了脱落酸调控的拟南芥根形态发育

被引：5

作者：

白玲 ^{[1
]}

周云 ^{[2
]}

张晓然 ^{[2
]}

宋纯鹏 ^{[2
]}

曹鸣庆 ^{[1
]}

机构：

[1] 首都师范大学生命科学学院

[2] 河南省植物逆境生物学重点实验室,河南大学生命科学学院

来源：

科学通报 | 2007年 / 05期

关键词：

拟南芥; 根生长; ABA; H2O2;

D O I：

暂无

中图分类号：

Q945.45 [形态生理学、器官发生的基本阶段];

学科分类号：

071008 ;

摘要：

脱落酸(abscisic acid,ABA)可以抑制拟南芥根的伸长生长和促进根毛的发育,但其中的信号转导机制仍不清楚.本研究利用拟南芥野生型和突变体为实验材料,研究发现过氧化氢(hydrogen peroxide,H2O2)对野生型根生长的影响与ABA类似;而抗坏血酸(ascorbic acid,ASA)可逆转ABA对野生型根生长的抑制效应;在拟南芥NADPH氧化酶缺失突变体atrbohF和atrbohC中ABA的这种作用丧失.激光共聚焦和实时定量RT-PCR分析表明,ABA可以诱导拟南芥根细胞H2O2的产生,并可增强H2O2相关基因OXI1的表达.本研究结果初步表明,H2O2作为一种重要的信号分子参与了ABA调节根生长发育的信号转导过程.

引用

页码：608 / 611

页数：4

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