白兰花的耐寒性及其越冬期保护酶活性的变化.pdfVIP

福建农业大学学报 29 (4) : 440- 443, 2000 Journal of Fujian A gricultural U niversity ( ) 文章编号:2000 白兰花的耐寒性及其越冬期保护酶活性的变化 佘　文　琴 (福建农业大学园艺系, 福建 福州 350002) 摘要: 用电导法测定白兰花的耐寒性. 结果表明, 白兰花临界低温为- 3 ℃, 低温持续时间不同对白兰花临界 低温有影响. - 1 ℃处理24 h 与- 3 ℃处理6 h , 白兰花叶片的电渗率相同. 在越冬期, 随着气温的降低及低温 持续时间的延长, 超氧物歧化酶、过氧化氢酶、过氧化物酶活性均呈下降趋势, 2 月份比上年越冬前 11 月份分 别降低了 26. 89% 、47. 36% 、54. 34%. 关键词: 白兰花; 越冬期; 保护酶; 耐寒性 中图分类号: S685. 15　　文献标识码: A Cold tolerance in ba ilan and change of its protective enzym e activ ity dur ing w in ter ing SH E W en qin ( , , , 350002, ) D epartm ent of Horticulture Fujian A gricultural U niversity Fuzhou Fujian Ch ina : ( . ) Abstract E lectrical conduction w as used to detect the cold tolerance of bailan M ichelia alba DC and it w as discovered that the critical low temperature w as - 3 ℃, affected by different lengthes of low temperature dura . - 1 ℃ 24 - 3 ℃ 6 . , tions T he electrolyte leakage at for hours w as equal to that at for hours D uring w intering the activities of superoxide dism utase, catalase and peroxidase tended to decrease w ith the temperature and lengthening of the low temperature duration , and in February they w ere respectively 26. 89% , 47. 36% and 54. 34% low er than those in N ovem ber before w intering. Key words: bailan; w intering; p rotective enzym e; cold tolerance 白兰花( . ) 属木兰科含笑属, 又称白兰、白玉兰, 原产印度尼西亚爪哇. 白 M ichelia alba DC 兰花枝叶繁茂, 花朵洁白, 花香浓烈, 不仅是城镇常用的绿化树, 而且是重要的香料花卉、乔木 常绿花卉. 白兰花喜阳光充足、温暖及湿润的气候, 不耐寒. 低温造成的寒害常给白兰花的种植