Effects of ecological water transport on photosynthesis and chlorophyll fluorescence of Populus euphratica

Zhao, Chun Yan and Si, Jian Hua and Feng, Qi and Yu, Teng Fei and Deo, Ravinesh C. and Luo, Huan (2017) Effects of ecological water transport on photosynthesis and chlorophyll fluorescence of Populus euphratica. Water Science and Technology: Water Supply, 17 (6). ISSN 1606-9749

Abstract

This study investigating the physiological response of Populus euphratica (P. euphratica) to ecological water transport. Results showed significant increases in net photosynthetic (32.71%), stomatal conductance (27.58%), and transpiration (25.18%) rates of P. euphratica prior to the ecological water transport treatment. Internal CO2 concentrations (Ci) decreased significantly compared to the day preceding the treatment (23.69%; P < 0.05). During the treatment, the O, J, I, and P steps quickly increased, with the P step exhibiting the most significant change (P < 0.05). Moreover, Fv /Fm and Fv/Fo values were highest 7 d after the ecological water transport treatment. During the treatment, the initial fluorescence (F0), the maximal fluorescence intensity (Fm), PI, and RC/CSo quickly increased, with an increasing percentage of 9.67%, 46.15%, 59.17%, and 48.54%. In contrast, Vj, ABS/RC, TRo/RC, and ETo/RC rapidly decreased, with a decreasing percentage of 30.43%, 43.54%, 37.50%, and 39.04%, respectively. After the treatment, the average chlorophyll content of a, b, and a + b increased by 26.36%, 8.89%, and 21.93%, respectively, compared to the day preceding the treatment. This study also found that the relationship between soil water content and the net photosynthetic rate, stomatal conductance, the transpiration rate, the internal CO2 concentration, Fv/Fm, and Fv/Fo of P. euphratica were strongest during the ecological water transport


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to ArticleFirst version, in accordance with the copyright policy of the publisher. This research was supported by Chinese Presidential Fellowship 2016 awarded to Dr Ravinesh Deo, also supported by USQ Academic Development and Outside Studies Program (ADOSP 2016).
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 07 Feb 2018 01:28
Last Modified: 31 Aug 2018 00:18
Uncontrolled Keywords: chlorophyll fluorescence, ecological water transport, photosynthesis, Populus euphratica
Fields of Research : 05 Environmental Sciences > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970105 Expanding Knowledge in the Environmental Sciences
Identification Number or DOI: 10.2166/ws.2017.236
URI: http://eprints.usq.edu.au/id/eprint/33485

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