二种生长调节剂对紫花苜蓿铝胁迫和恢复生长的影响  

Effects of Two Plant Growth Regulators on the Growth and Recovery of Alfalfa Seedlings Exposed to Aluminum Stress

作　　者：闫雯[1,2] 张兴兴[1,2] 安渊[1,2] 

机构地区：[1]上海交通大学农业与生物学院,上海200240 [2]农业部都市农业(南方)重点实验室,上海200240

出　　处：《上海交通大学学报（农业科学版）》2011年第2期75-82,共8页Journal of Shanghai Jiaotong University(Agricultural Science)

基　　金：国家自然科学基金项目(31072071);公益性行业(农业)科研专项(200903056)

摘　　要：采用二种外源生长调节剂(GAI、AA)和二种处理方法(喷施和浸根),研究了不同生长调节剂对铝胁迫紫花苜蓿(Medicago sativaL.)恢复生长,以及对铝胁迫下紫花苜蓿生长的影响。结果表明,IAA和GA对铝胁迫紫花苜蓿恢复生长过程中,紫花苜蓿根长、根重和地上生物量均有明显的促进作用(P<0.05),但IAA的促进作用更明显。同时,IAA还具有明显缓解紫花苜蓿铝毒,促进铝胁迫下紫花苜蓿地上和地下生物量增加的作用。本研究结果揭示铝胁迫下紫花苜蓿生长受到抑制与内源IAA合成受到抑制密切相关,这个结果为从植物激素合成和调控途径进一步研究紫花苜蓿抗铝毒的生理和分子机理奠定基础。The effects of plant growth regulators（GA and IAA） and their exogenous applicative ways（spraying and dipping） to alfalfa on the growth and recovery of the Al-stressed alfalfa were studied in this paper.The results showed that the exogenous IAA significantly increased the root elongation,root weight and above-ground biomass of alfalfa during the recovery growth of Al-stressed alfalfa（P0.05）,while the GA also showed the similar effect,but the effect was lower than that of IAA.Meanwhile,exogenous IAA significantly alleviated Al toxicity in alfalfa,and enhanced the growth of Al-stressed alfalfa both in shoot and root.These results indicated that the Al-induced inhibition to the growth of alfalfa was closely relative to the inhibition of the internal IAA synthesis,and provided a practical way to further study the mechanism of anti Al-toxicity at the physiological and molecular level in the fields of synthesis and modulation of internal IAA in alfalfa.

关 键 词：紫花苜蓿 铝胁迫 植物生长调节剂 吲哚乙酸 

分 类 号：S963.223.3[农业科学—水产养殖]