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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 2的耐冷性由一个单显性基因所控制
Water-resistant wild-type PI4 82 32 2 seedlings showed strong cold tolerance under the condition of low temperature (12 ± 1) ℃ and optical density of 14 0 μE · m-2 · s-1. At low temperature, the activity of protective enzymes SOD and CAT in watermelon seedling leaves decreased, but the decrease of wild type cold-tolerant material PI4 82 32 2 was less than that of cold-tolerant 9710 3, and the accumulation of reactive oxygen species was less The main physiological causes of cold tolerance. The cold tolerance of the wild, cold tolerant material PI4 82 32 2 is controlled by a single dominant gene