• 研究报告 •

红树林生境中互花米草气孔导度的动态变化

1. 广西师范大学生命科学学院,广西桂林 541004
• 出版日期:2009-11-10 发布日期:2009-11-10

Dynamics in leaf stomatal conductance of Spartina alterniflora in mangrove habitats.

QIN Ying-ying;GAN Xiao-mei;JIANG Xiao-xiao;LI Jun-wei;WE ;Feng;LIANG Shi-chu++

1. College of Life Science, Guangxi Normal University, Guilin 541004, Guangxi, China
• Online:2009-11-10 Published:2009-11-10

Abstract: The study on the dynamic changes in the leaf stomatal conductance of invasive plant Spartina alterniflora in loamy mangrove habitat from noon (ebbtide) to evening and the relevant environmental factors showed that the leaf stomatal conductance of S. alterniflorawas in the order of upper part > top > lowermid part > lower part, and had a power function relationship with light intensity and leaf temperature but a negative exponential function relationship with time and relative humidity. It was the greatest at 50%-60% relative humidity, and became smaller with the further increase of the humidity. The midpart leaves had the greatest contribution to the accumulation of photosynthates. There existed interactions among diverse environmental factors on the stomatal opening and closure, and thus, the leaf stomatal conductance of S. alterniflora could be viewed as a comprehensive response to environmental parameters.