生态学杂志2025，Vol.44Issue(11)：3620-3628,9.DOI:10.13292/j.1000-4890.202511.004
大气CO2浓度倍增和CdCl2胁迫对玉米生长及光合性能的影响
Effects of elevated atmospheric CO2 concentration and CdCl2 stress on plant growth and photosynthetic performance of maize
摘要
Abstract
To better understand the physiological and ecological responses of maize to elevated atmospheric CO2 concentration and soil cadmium pollution under future climate change,we investigated the interactive effects of dif-ferent CO2 concentrations and CdCl2 stresses on leaf gas exchange,chlorophyll content,plant biomass as well as the MDA content and related antioxidant enzyme activities of the maize cultivar Zhengdan 958 in a split-plot experiment with environmental growth chambers.Elevated atmospheric CO2 concentration increased net photosynthetic rate(Pn)by 24％(P＜0.001)and 6％(P＜0.05)under mild and severe CdCl2 stress,respectively.Elevated atmos-pheric CO2 concentration decreased the transpiration rate and stomatal conductance of maize leaves(P＜0.001),and thus increased the instantaneous water use efficiency(P＜0.001).Mild CdCl2 stress significantly increased leaf biomass under ambient CO2 concentration(P＜0.001),but elevated CO2 concentration decreased root biomass(P＜0.05)and stem biomass of maize(P＜0.001).Mild and moderate CdCl2 stress increased MDA content and POD activity in maize leaves under different CO2 concentrations,but elevated CO2 concentration reduced MDA con-tent and POD activity.There were significantly interactive effects of CO2 concentration and CdCl2 stress on the Pn of maize plants(P=0.002).Our results suggested that elevated atmospheric CO2 concentration could increase net photosynthetic rate and instantaneous water use efficiency of maize under mild and moderate CdCl2 stress,but reduce the MDA content,thus improving the resistance of maize plants to CdCl2 stress.关键词
玉米(Zea may L.)/二氧化碳浓度/镉胁迫/气体交换参数/生理过程Key words
maize(Zea may L.)/CO2 concentration/Cd stress/gas exchange parameter/physiological process引用本文复制引用
张佳睿,莫晓燕,宋炜,李菲,马超,郝立华,郑云普,刘亮..大气CO2浓度倍增和CdCl2胁迫对玉米生长及光合性能的影响[J].生态学杂志,2025,44(11):3620-3628,9.基金项目
河北省自然科学基金项目(E2023402086和E2024402128)资助. （E2023402086和E2024402128）
