Photosynthetic physio-response of Taxodium ascendens seedlings to different soil water gradients |
| |
Authors: | Changxiao Li Zhangcheng Zhong |
| |
Institution: | (1) College of Life Sciences, Southwest China Normal University, Chongqing, 400715, China;(2) The State Education Ministry’s Key Laboratory for the Eco-environment of Three Gorges Reservoir Area, Southwest China Normal University, Chongqing, 400715, China |
| |
Abstract: | Four different kinds of water treatments were applied to study the photosynthetic eco-physiological characteristics of Taxodium ascendens seedlings in the environment of the Three Gorges hydro-fluctuation belt. The four kinds of water treatments were: normal
growth water condition (CK), light drought stress (T1), soil water saturation (T2), and soil submersion (T3). The results
showed that different water treatments could effectively influence the content of the photosynthetic pigment, leaf gas exchange
and apparent resources use efficiency of T. ascendens seedlings. It was also demonstrated that the T. ascendens seedlings could not only tolerate water submersion and wet conditions but also endure a certain degree of drought. To establish
a protection forest system in the hydro-fluctuation belt in the Three Gorges Reservoir Area, the species T. ascendens is suitable for planting in conditions of root submersion or water-saturated soil. In case it is planted in drought conditions,
this tree species should be watered appropriately in order to keep its normal net photosynthetic rate.
Translated from Forest Research, 2006, 19(1): 54–60 译自: 林业科学研究] |
| |
Keywords: | Three Gorges Reservoir Area hydro-fluctuation belt Taxodium ascendens seedlings soil water gradients photosynthetic physio-response |
本文献已被 SpringerLink 等数据库收录! |
|