外源植物激素对东方山羊豆响应盐胁迫的调控效应初探  

Effects of NaCl stress and exogenous plant hormones on seed germination and seedling growth of Galega orientalis

作　　者：田聪[1] 张清斌[1] 顾祥[1] 韩青 朱忠艳[1] 王承军[1] 穆尼热[1] 

机构地区：[1]新疆畜牧科学院草业研究所,新疆乌鲁木齐830000 [2]新疆维吾尔自治区农产品质量安全监督检验中心,新疆乌鲁木齐830049

出　　处：《草业科学》2012年第12期1910-1914,共5页Pratacultural Science

基　　金：新疆畜牧科学院青年基金项目(2010QJ003);新疆维吾尔自治区科技成果转化项目(201154110)

摘　　要：为确定东方山羊豆(Galega orientalis)种子萌发及苗期耐盐性,明确在盐胁迫条件下,植物生长激素对东方山羊豆种子萌发及苗期生理特性的影响,分析比较了不同NaCl浓度(0、25、50、100、150、200mmol.L-1)梯度及不同植物生长激素处理下的东方山羊豆种子萌发率、幼苗脯氨酸、丙二醛和叶绿素含量等指标的差异。结果表明,东方山羊豆种子和幼苗对盐胁迫比较敏感,东方山羊豆能够适应50mmol.L-1浓度以内NaCl胁迫,50mmol.L-1浓度以内NaCl对种子萌发及幼苗生长影响小,随着NaCl浓度的增高,种子发芽率和幼苗丙二醛、叶绿素含量显著降低,脯氨酸含量显著增加;GA3可以提高150mmol.L-1浓度以内NaCl胁迫条件下东方山羊豆的种子萌发率;NAA适合调控东方山羊豆幼苗在中、低盐浓度下的生长。In order to determine the concentration of salt tolerance standard and confirm effects of different plant growth hormones on seed germination and seedling physiological characteristics, the seeds of Galega orientalis were germinated at different concentration of NaCI solutions, and then germination rate, seedling praline, MDA and chlorophyll contents were compared. The results showed that G. orientalis seed germination and seedling growth were sensitive to salinity. The seeds can endure NaCI stress under 50 mmol·L^-1. The lower NaC1 concentration did not significantly affect the seed germination and seedling growth. However, with the NaC1 concentration increasing, the germination rate,MDA and chlorophyll contents of G. orientalis seedlings decreased and the proline content significantly （P〈0.05） increased. The results also indicated that GAa was suitable for increasing the seed germination of G. orientalis when the salt concentration was below 150 mmol·L^-1 and NAA was available to regulate the seedling growth under middle or low salt stress levels.

关 键 词：东方山羊豆 种子萌发 植物生长激素 耐盐生理 

分 类 号：S541.9[农业科学—作物学]