盐胁迫对南疆野生龙葵种子萌芽的影响

The Influence of Salt Stress on Seed Germination of Southern Xinjiang Wild Solanum nigrum L.

以龙葵和红果龙葵为试材,研究了NaCl、KCl、Ca(NO3)2不同浓度盐胁迫对2种龙葵种子萌芽的影响。结果表明:NaCl、KCl溶液在低浓度下对2种龙葵种子萌芽有促进作用,而Ca(NO3)2溶液在低浓度下对2种龙葵种子萌芽没有促进作用;且3种盐对种子萌芽的抑制效果的大小顺序为KCl>NaCl>Ca(NO3)2。龙葵的致死浓度在400～450mmol/L,红果龙葵的致死浓度在300～350mmol/L;龙葵在高浓度的3种盐胁迫下萌芽率均大于红果龙葵,表明龙葵的抗盐性较强。

With Solanum nigrum L. and red fruit Solanum nigrum L. as materials, different concentration of NaC1, KC1, Ca（NO3）2 on the influence seed germination were stdied. The results showed that NaC1, KC1 solution in low concentrations had promote role on the seed gemination of two kinds of Solanum nigrum L. The Ca（NO3 ） 2 solution in low concentrations had no role in promoting; and the effect of seeds inhibition of three kinds of salt was KCl〉NaCl〉 Ca（NOa ）2. The concentration of lethal concentration of Solanum nigrum L. were 400-450 mmol/L,red fruits Solanum nigrum L. lethal concentration was 300-350 mmol/L;in the high concentration of salt stress,Solanum nigrum L. had greater germination rate than red fruits Solanum nigrum L. , it showed that the Solanum nigrum L. had stronger resistance.