多效唑提高广西种源马尾松苗抗寒性的效应  

EFFECTS OF PP_(333) ENHANCING THE COLD RESISTANCE OF GUANGXI MASSON PINE

作　　者：汪安琳[1] 高强[1] 

机构地区：[1]南京林业大学森林资源与环境学院

出　　处：《南京林业大学学报（自然科学版）》1994年第2期1-6,共6页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金

摘　　要：原产地广西的马尾松种子，４月下旬在南京播种育苗，１０月中旬以２５和５０ｍｇ·Ｌ￣（－１）多效唑溶液淋灌处理，对松苗越冬有良好的效应，尤以５０ｍｇ·Ｌ￣（－１）处理的效果较为明显。在越冬期间多效唑处理苗的电解质渗漏率低于对照，超氧物歧化酶与吲哚乙酸氧化酶活性比对照显著增强，接近于抗寒性强的江苏种源马尾松苗。此外，多效唑处理苗的可溶性糖含量及生物量（包括根和茎叶的鲜重、干重）均明显高于对照，而五个月的高生长增加量仅为对照的７９％和５５％。Seeds of pinns massoniana Lamb.(masson pine) from Guangxi were sown in Nanjing on April 25, 1992. The seedlings were treated with 25 and 50 mg. L-1 Paclobutrazol(PP_(333)) on October 19, during the winter time. It was shown that the electrolytic leakage of PP_(333) treated seedling leaves was decreased, the activity of superoxide dismutase(SOD) and the content of water-soluble sugar were increased. Moreover, in early spring, the activity of lAAoxidase in PP_(333) treated leaves was promoted obviously. PP_(333)(25. 50 mg. L-1) could retard the height of seedlings in the field esperiment. The fresh and dry weight of treated seedlings were superior to the control and the effects of 50 mg. L-1 were much stronger than that of 25 mg. L-1. These results suggest that 50 mg. L-1 PP_(333) can enhance the resistance of masson pine seedlings under low temperatures.

关 键 词：多效唑 马尾松 抗寒性 生长 

分 类 号：S791.248[农业科学—林木遗传育种]