Variable chlorophyll fluorescence in response to water plus heat stress treatments in three coniferous tree seedlings

作     者：喻方圆 Robert D.Guy YU Fang-yuan;Robert D.Guy

作者机构：南京林业大学森林资源与环境学院南京210037 加拿大不列颠哥伦比亚大学林学系 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2004年第15卷第1期

页      面：24-28,J001-J002页

核心收录：

学科分类：0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 

主　　题：Chinese fir Chlorophyll fluorescence Heat stress Masson pine Water stress Western redcedar 

摘      要：Effects of water and heat stress treatments on chlorophyll fluorescence of Chinese fir (Cunninghamia lanceolata), Masson pine (Pinus massoniana) and western redcedar (Thuja plicata D. Don)_seedlings were monitored during a three-cycle stress period. It was shown that ratio of variable to maximal chlorophyll fluorescence (Fv/Fm) of these three species responded differently to water stress treatments. The Fv/Fm ratio of western redcedar decreased dramatically after water stress, while that of Chinese fir had only a slight reduction and that of Masson pine had no significant change. The experiment also showed that the Fv/Fm ratio of all three species differed significantly under heat stress treatments. Concerning three different water plus heat stress cycles, it was found that the Fv/Fm ratios of Chinese fir and Masson pine measured at the end of each water plus heat stress cycle were not significantly different. However, the Fv/Fm ratio of western redcedar was diminished significantly in response to an increase of stress time. Keywords Chinese fir - Chlorophyll fluorescence - Heat stress - Masson pine - Water stress - Western redcedar CLC number Q945.17 - S791.248 Document code A Biography: Yu Fang-yuan (1965-), male, Ph. Doctor. Associate professor in College of Forest Resources and Environment, Nanjing, Forestry University, Nanjing 210037, P. R. China. Responsible editor: Zhu Hong