【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。更多还原

【Abstract】 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 NaCl 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 NaCl stress under 50 mmol·L-1.The lower NaCl concentration did not significantly affect the seed germination and seedling growth.However,with the NaCl 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 GA3 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.更多还原