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生长素、乙烯和一氧化氮对拟南芥下胚轴插条形成不定根的调节
引用本文:王金祥,陈碧丽,廖红,严小龙. 生长素、乙烯和一氧化氮对拟南芥下胚轴插条形成不定根的调节[J]. 植物生理学通讯, 2009, 0(10): 986-990
作者姓名:王金祥  陈碧丽  廖红  严小龙
作者单位:华南农业大学资源与环境学院、根系生物学研究中心,广州510642
基金项目:广东省自然科学基金(04300588)、教育部博士点基金(20040564004)和国家自然科学基金(30600380).美国拟南芥种子中心(ABRC)提供aux1-7、axr1-3、tir1-1、etr1-1、ctr1-1、ein2-1和ein3-1突变体种子:Hidehiro Fukaki和Catherine Bellini博士提供slr-1和ARF17过表达系种子.
摘    要:研究生长素、乙烯和一氧化氮(NO)对拟南芥下胚轴插条形成不定根的调节,以及生长素和乙烯信号转导成员在IAA促进不定根形成中的作用的结果表明:拟南芥切条以IAA和硝普钠(N0供体)单独处理7d后的不定根形成均受到促进,其中以50μmol·L^-1 IAAμmol·L^-1 SNP的促进作用为最强,乙烯的促进作用不明显;生长素运输和信号转导以及乙烯信号转导相关突变体对IAA促进生根作用的敏感性比野生型有所下降,特别是IAA14功能获得型的突变体。IAA和NO在促进不定根形成中有协同效应。

关 键 词:拟南芥不定根  下胚轴插条  生长素  乙烯  一氧化氮

Regulation of Auxin,Ethylene and Nitric Oxide on Adventitious Rooting in Arabidopsis Hypocotyl Cuttings
WANG Jin-Xiang,CHEN Bi-Li,LIAO Hong,YAN Xiao-Long. Regulation of Auxin,Ethylene and Nitric Oxide on Adventitious Rooting in Arabidopsis Hypocotyl Cuttings[J]. Plant Physiology Communications, 2009, 0(10): 986-990
Authors:WANG Jin-Xiang  CHEN Bi-Li  LIAO Hong  YAN Xiao-Long
Affiliation:(Root Biology Center, College of Natural Resources and Environment Sciences, South China Agricultural University, Guangzhou 510642, China)
Abstract:Arabidopsis hypocotyl cuttings were employed to study effects of auxin, ethylene and nitric oxide (NO) on adventitious rooting. The functions of auxin and ethylene signaling players cooperated with indole acetic acid (IAA) in adventitious rooting were also investigated. The results showed that treatment with either IAA or sodium nitroprusside (SNP, donor of NO) on Arabidopsis cuttings for 7 days could stimulate adventitious root formation, and the optimal concentration is 50 μmol·L^-1 and 1 μmol·L^-1, respectively; while ethylene played little role in rooting. Compared with wild type, sensitivity of auxin transportation and signal transduction and ethylene signaling-related mutants to stimulatory effect of IAA on rooting was reduced, especially gain-offunction of mutated IAA14 (SLR). NO had synergistic role with IAA in adventitious rooting.
Keywords:Arabidopsis adventitious root  hypocotyl cutting  auxin  ethylene  nitric oxide
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