摘要
西瓜野生耐冷材料PI4 82 32 2幼苗在偏低温 (12± 1)℃、光流密度 14 0 μE·m- 2 ·s- 1条件下表现出较强的耐冷性。在低温光照条件下 ,西瓜幼苗叶片内保护酶SOD ,CAT的活性均下降 ,但野生耐冷材料PI4 82 32 2较冷敏品种 9710 3的下降幅度小 ,体内活性氧的积累少 ,是其表现出耐冷性的主要生理原因。野生耐冷材料PI4 82 32
Watermelon wild germplasm (Citrullus lanatus var citroides) PI482322 had high chilling tolerance under the condition of (12±1)℃ temperature and 140 μE·m -2 ·s -1 PFD (photon flux density). As the time of low temperature treatment increased, the activities of SOD and CAT in watermelon seedling leaves decreased. Comparing with these of chilling sensitive cultivar 97103, the decrement of activities of SOD and CAT of wild chilling resistance germplasm PI482322 was smaller, and the accumulation content of active oxygen in the seedling was less. These were main physiological causes of cold resistance. The chilling tolerance of PI482322 was controlled by one dominant gene.
出处
《华北农学报》
CSCD
北大核心
2000年第2期67-71,共5页
Acta Agriculturae Boreali-Sinica
基金
北京市自然科学基金重点项目
关键词
西瓜
耐冷性
生理生化特性
遗传
野生耐冷材料
Watermelon (Citrullus lanatus)
Chilling tolerance
Physiological and biochemical characteristic
Inheritance
