外源钙对盐胁迫下紫穗槐种子萌发及叶绿素含量的影响

Effect of Exogenous CaCl_2 on Seed Germination and Chlorophyll Content of Amorpha fruticosa Under Salt-stress

以紫穗槐种子为试材,研究了盐胁迫下不同浓度外源CaCl2(0、5、10、15、20、25、40 mmol/L)对其种子发芽率、发芽势、根系活力、幼苗生长高度及叶绿素含量变化的影响。结果表明:盐胁迫条件下,施用一定浓度的CaCl2能有效地缓解NaCl单盐毒害,改善幼叶叶绿素含量,增强幼苗抗盐能力。但过高浓度的CaCl2也会对种子的萌发及幼苗的生长产生一定的抑制作用。综合各项指标,以5 mmol/L CaCl2+0.15 mmol/L NaCl效果最好。

Germination rate,potential,root activity,seedling′s height and chlorophyll content of Amorpha fruticosa seeds were studied in this experiment,which were done under salt-stress with different concentrations of exogenous CaCl2（0,5,10,15,20,25,40 mmol/L）.Results showed that certain concentration of calcium chloride could effectively reduce the salt toxic of sodium chloride,relief its stress mitigate,improve the chlorophyll content of immature leaves and enhance the seedling salt-resistant ability.However,high levels of calcium would also produce adverse effects on seed germination and seedling growth.From the research,a conlusion could be conclued that 5 mmol/L CaCl2＋0.15 mmol/L NaCl was considered as a suitable concentration.