NaCl胁迫对辣椒种子发芽特性的影响

以绿洲椒霸、日本天鹰椒、新优一号和高产懒椒王4个辣椒品种为材料,研究了NaCl胁迫对辣椒种子发芽特性的影响。结果表明:在低浓度NaCl(30mmol/L)胁迫下,绿洲椒霸、日本天鹰椒、新优一号和高产懒椒王4个辣椒品种的活力指数与对照相比均显著提高,侧根数分别比对照下降了4.7%、29.9%、51.3%、45.0%,绿洲椒霸和高产懒椒王的发芽势、发芽率、发芽指数和根长显著提高;高浓度NaCl胁迫(≥60mmol/L)对以上4个辣椒品种的发芽势、发芽率、发芽指数、活力指数、根长和侧根数均有不同程度的抑制作用,并且随着NaCl浓度的增加,各指标抑制作用逐渐增强,其中日本天鹰椒和新优一号的降幅较小,而绿洲椒霸与高产懒椒王则有较大的降幅。

Effects of NaCl Stress on Seed Germination of Pepper

In this paper,4 pepper cultivars Luzhoujiaoba,Ribentianyingjiao,Xinyouyihao and Gaochanlanjiaowang were used to study the effects of NaCl stress on pepper seed germination characteristics.The results showed that:at low concentrations of NaCl (30mmol/L) stress,the seed vitality indexes of 4 pepper varieties were significantly improved,their lateral roots numbers dropped 4.7%,29.9%,51.3%,45.0% compared with the control respectively,and germination potential,germination rate,germination index and root length of Luzhoujiaoba and Gaochanlanjiaowang obviously increased;but there were different degrees of inhibition at high concentrations of NaCl stress (≥ 60mmol/L) on all index value of 4 varieties above-mentioned.Furthermore,as the NaCl concentration increased,the inhibition gradually enhanced.There was a small decline in Ribentianyingjiao and Xinyouyihao and a great decline in Luzhoujiaoba and Gaochanlanjiaowang.