寒旱农业科学2025，Vol.4Issue(6)：536-542,7.DOI:10.3969/j.issn.2097-2172.2025.06.008
干旱胁迫对黑河湿地典型植物芦苇生理特性的影响
Effects of Drought Stress on the Physiological Characteristics of Typical Plant(Phragmites australis)in the Heihe Wetland
摘要
Abstract
In order to understand the health status of the Heihe River wetland ecosystem and provide a theoretical foundation and novel perspectives for its restoration and conservation,this study investigated the changes in chlorophyll fluorescence parameters,protein content,and antioxidant enzyme activities under continuous drought conditions using Phragmites australis,a typical plant of the Heihe River wetland,as the test material.The results showed that the soluble protein content of P.australis increased first and then decreased under drought stress,suggesting that in the early stage of drought stress,the self-defense function of reed body was turned on,which induced its own drought stress protein,leading to the increase of soluble protein content in the body,but when the drought stress level continued to increase,its self-defense system was destroyed,and its soluble protein content decreased.The minimum fluorescence(F0)of P.australis leaves increased with prolonged drought stress,while the maximum fluorescence(Fm),photosystem II(PSII)maximum photochemical efficiency(Fv/Fm),and the quantum efficiency of PSII electron transport(ΦPSII)decreased significantly,indicating that with the increase of drought stress,the stability of PSII reaction center in P.australis leaves was destroyed,the ability of transmitting electron in reaction center was decreased,the primary reaction of photosynthesis was inhibited,and finally the photosynthetic ability of P.australis leaves was decreased.The Malondialdehyde(MDA)content of reed leaves continued to increase under drought stress,indicating high sensitivity of P.australis to drought.The SOD,POD,and CAT enzyme activities showed a trend of increase first and then decrease,indicating that drought stress led to the increase of membrane lipid peroxidation degree of P.australis leaves,the destruction of cell membrane,and finally the damage of membrane structure.Initially,the plant mitigated damage through elevated antioxidant activity,but this defense became ineffective as drought stress intensified.关键词
芦苇/干旱胁迫/生理特性/黑河湿地Key words
Phragmites australis/Drought stress/Physiological characteristic/Heihe wetland分类
农业科技引用本文复制引用
王宏霞,张亚娟,高宏..干旱胁迫对黑河湿地典型植物芦苇生理特性的影响[J].寒旱农业科学,2025,4(6):536-542,7.基金项目
中央引导地方科技发展资金项目(22ZY1QA001) （22ZY1QA001）
西北中药材全程机械化科研基地建设项目(2109-000000-20-01-199092) （2109-000000-20-01-199092）
甘肃省科技厅高等学校科研项目(2017A-085). （2017A-085）
