四川大学学报（自然科学版）2012，Vol.49Issue(1)：199-204,6.DOI:10.3969/j.issn.0490-6756.2012.01.033
叶绿体信号参与了拟南芥干旱胁迫响应
Plastid signals may participate in drought responses of Arabidopsis seedlings
摘要
Abstract
The effect of 50μmol/L norflurazon (NF) on the physiological parameters and the transcrip-tional levels of resistance genes of Arabidopsis wild-type seedlings and two plastid-signaling mutants (gunl and gun5) under drought stress were studied. 10 days after the drought and NF co-stress, the leaves were wilting and photo-bleached; leaf absolute water content decreased; malondialdehyde (MDA) content significantly increased; reactive oxygen species (ROS) accumulation was induced; Lhcb gene expression was down-regulated and POD, APX, GPX and Rd29a gene expression was apparently up-regulated. However, the mutant leaves were more severely photo-bleached and the changes of physiological parameters and gene expression were less (sometimes unchanged) in gunl or gun5 mutants than in the wild-type plants. The results indicate that GUN1 and GUN5 proteins, two key factors mediating plastid signaling, may participate in plant adaptation to water stress and drought signaling, especially for the GUN1 protein. There might be a crosstalk between plastid signaling and abiotic stress tolerance.关键词
拟南芥/除草剂/干旱胁迫/丙二醛/抗氧化酶类Key words
Arabidopsis/norflurazon/drought stress. MDA/antioxidant enzymes分类
农业科技引用本文复制引用
何春霞,曹文尧,张中伟,程鉴,徐飞,林宏辉,袁澍..叶绿体信号参与了拟南芥干旱胁迫响应[J].四川大学学报（自然科学版）,2012,49(1):199-204,6.基金项目
国家自然基金(31070210 （）
30970214 （）
30800071) （）
973计划(2009CB118500) （2009CB118500）
四川省科技厅项目(2010JQ0080) （2010JQ0080）
教育部项目(20110181110059) （20110181110059）
成都市科技局(11DXYB097JH-027) （11DXYB097JH-027）
