高温对柑橘超氧化物歧化酶和过氧化氢酶的影响

EFFECT OF HIGH TEMPERATURE ON THE ACTIVITY OF SUPEROXIDE DISMUTASE AND CATALASE IN CITRUS

４ 种柑橘胚性愈伤组织细胞经３０ ～５５ ℃不同高温处理，其超氧化物歧化酶（ＳＯＤ） 活性均有不同程度的提高，ＳＯＤ 活性上升幅度的大小与品种的耐热性一致；过氧化氢酶活性在亚高温（４０ ℃） 以上随处理温度的上升而急剧上升；而ＭＤＡ 含量的变化几乎与此同步；高温伤害的另一特征是组织细胞蛋白质含量的下降。

Four citrus callus cells are treated with high-temperature of 30～50℃.The activity of SOD increases in accordance with the heat-resistant property of the cultivars . Furthermore, the activity of CAT increases drastically with the increasing temperature under 40℃,with which the content of MDA changes.Another characteristic of injury due to high - temperature is the decrease of the protein content.