低温弱光对甜(辣)椒幼苗几种生理指标变化及相关性研究 Study of Low Temperature and Weak Light on Change of Some Electro-Physiological Index and Its Correlation with Chilling Injury Index of Sweet (Hot) Pepper Seedlings

研究低温弱光条件下不同甜辣椒品种各个生理指标的变化及相关性分析，探索甜(辣)椒耐低温弱光性的鉴定指标。以6个甜(辣)椒品种为参试材料，以茄门(不耐低温弱光对照，CK1)和湘研1号(耐低温弱光对照，CK2)为对照材料，在低温弱光条件下，研究了幼苗叶片7个生理指标的变化及其与植株冷害指数的相关性分析。处理14 d，21 d的叶片SOD、CAT活性与植株冷害指数均呈极显著负相关，处理21 d的叶片丙二醛含量和渗透率与植株冷害指数均呈极显著正相关，处理14 d的叶片可溶性蛋白、脯氨酸含量与植株冷害指数均呈极显著负相关，这6个指标可作为甜(辣)椒幼苗耐低温弱光性的鉴定指标。 To study the changes and correlations of various physiological indexes of different sweet pepper cultivars under low temperature and low light conditions, and explore the identification indexes of low temperature and low light resistance of sweet (pepper) pepper. In order to study of sweet (hot) pepper seedlings leaf change of seven physiological indexes and its correlation with chilling injury index. Six sweet (hot) peppers varieties (with Qiemen and Xiangyan one as control) were chosen to investigate on low temperature and weak light. On fourteen and twenty-one days, relations between SOD and CAT activity and chilling injury index was a significant negative correlation; On twenty-one days, Malondialdehyde content and permeability were significant positive correlation with plant chilling injury index; On fourteen days, between proline content and soluble protein content were significant negative correlation with plant chilling injury index. There indicators can be used as a sweet (hot) pepper positive indicator of low temperature and poor light stress.