低温弱光对CMS三系辣椒幼苗形态指标与冷害指数的影响

Effects of Low Temperature and Weak Light on Morphology Indicators and Cold Damage Indices of CMS Three-lines Hot Pepper Seedlings

以辣椒CMS三系的不育系、恢复系与相应杂交一代幼苗为材料,研究了辣椒幼苗对低温弱光及其恢复过程的响应。结果表明:低温弱光胁迫下,辣椒幼苗植株生长减缓或停止,外部形态出现部分变化。低温弱光处理10天后,与对照相比各试验材料株高增加缓慢,基本停止生长,但恢复系表现出较好的低温弱光耐受性。从外部形态与冷害指数综合来看,杂交种与恢复系受害程度明显较轻。

With the cytoplasmic male sterile （CMS） line, restorer line and the corresponding hybrid as materials, the response of hot pepper （ Capsicum annuum L. ） seedlings to weak light and low temperature and its recovery stage were studied in this paper. The results showed that low temperature and weak light led the seedlings to grow slowly or stop, and made the outer shape change partly. After treated under low temperature and weak light for 10 days, the plant height increased slowly or stopped, but the restorer line showed better endurance. The ratio of dry weight to fresh weight of leaves and aerial part declined firstly, afterward in- creased, then declined, and then increased again. In conclusion, the restorer line and hybrid of hot pepper had fewer damage symptoms in the external morphology.