低温胁迫对不同品种山茶生理生化指标的影响

摘要

Objective] To explore the cold resistance of different camellia cultivars.[Method] Using artificial low temperature method, the cold resistance of three cultivars of camellia (Camellia sinensis, Camellia crimea, Camellia japonica) was determined.The relationship between phys-iological and biochemical indices and cold resistance of camellia was analyzed.[Result] Under low temperature stress(0,-5,-10,-15 ℃), the cold resistance of C.sinensis was significantly higher than that of C.crimea and C.japonica.The correlation analysis showed that the cold har-diness of camellia was inversely proportional to MDA content and relative electrical conductivity, but it was directly proportional to SOD activity , POD activity and soluble protein content.[Conclusion] The research can provide references for the production, introduction and gardening appli-cation of camellia in low temperature region.%[目的]探究不同山茶品种的抗寒性。[方法]采用人工模拟低温处理的方法对3个山茶品种（逸香、克里木、六角大红）的耐寒性进行了测定，分析各生理指标与抗寒性的关系。[结果]不同低温胁迫下（0、－5、－10、－15℃），逸香的抗寒性明显高于克里木和六角大红。相关性分析表明，山茶的耐寒性与相对电导率和丙二醛（MDA）含量成反比，与超氧化物歧化酶（SOD）活性、过氧化物酶（POD）活性、可溶性蛋白含量成正比。[结论]该研究可为低温地区山茶生产、引种以及园林应用提供参考。