北京林业大学学报2009，Vol.31Issue(6)：121-127,7.
泡桐生长停止和顶芽死亡过程中的光合特性研究
Photosynthetic characteristics of Paulownia during growth cessation and terminal buds'death
摘要
Abstract
The cources of growth cessation and terminal bud's death of Paulownia tomentosa x P. Fortunei 33 were investigated through external morphology. Simultaneously, photosynthetic characteristics were observed and the main influencing factors of photosynthetic rate were analyzed. The results were as the followings:height growth stopped in late September; at the end of September and early October, most of terminal buds changed from green to brown and drying; stop date of diameter growth was later than height growth'. P_nshowed two peaks in clear day and midday depression was observed. P_nwas extremely remarkable relevant with T_x, PAR, G_s, and remarkable relevant with t_1. Terminal bud's death was mainly induced by nonstomatal factors. In September and October, P_n declined, but still maintained a high level. Photosynthate was mainly used for diameter growth and formation of lateral dormancy buds; terminal bud's death is an adaptation strategy during evolution course of Paulownia.关键词
毛白33泡桐/顶芽/死亡过程/光合特性Key words
Paulownia tomentosa x P. Fortunei 33/ terminal bud/ death course/ photosynthetic characteristics分类
农业科技引用本文复制引用
王艳梅,牛晓峰,刘震,张娜,范新..泡桐生长停止和顶芽死亡过程中的光合特性研究[J].北京林业大学学报,2009,31(6):121-127,7.基金项目
教育部留学回国人员科研启动资助项目(2000)、教育部博士点基金项目(200804660002)、河南省杰出青年基金项目(002). （2000）
