安徽农业大学学报2025，Vol.52Issue(3)：420-427,8.DOI:10.13610/j.cnki.1672-352x.20250616.002
水体镉污染对水葫芦光合特性的影响
Effects of cadmium pollution on photosynthetic characteristics of Eichhornia crassipes
摘要
Abstract
[Objective]The study aimed to explore the effects of cadmium pollution on photosynthetic char-acteristics of Eichhornia crassipes.[Method]E.crassipes was treated with different concentrations of Cd2+for varying durations,and the biomass,chloroplast ultrastructure,photosynthetic physiological parameters(including chlorophyll fluorescence kinetics characteristics),and activities of key enzymes involved in photosynthesis were systematic measured.[Result]When E.crassipes was treated with cadmium of 1.5 mg·L-1 for 10 days,there was no significant difference on the growth and photosynthesis indexes of E.crassipes between the Cd2+treatment and the control;however,the plant height,plant weight and leaf number of E.crassipes were significantly decreased,chloroplast was slightly damaged,and PEP carboxylase activity was decreased under 2.5 mg·L-1 Cd2+treatment.When E.crassipes was treated with 1.5 mg·L-1 Cd2+for 30 days,the number of leaves of E.crassipes,plant height,plant weight and chlorophyll a content decreased slightly compared to the control.The damage on chloro-plast ultrastructure and the inhibition on PEP carboxylase activity were more serious with the increase of Cd2+concentration.The main parameters of chlorophyll fluorescence in the leaves of E.crassipes decreased in PIabs and slightly increased in ABS/RC,TRo/RC and DIo/RC as compared with the control group,while Fv/Fm,ETo/RC,φEo and ΨEo had no significant change.[Conclusion]E.crassipes has a certain tolerance to Cd2+pollu-tion,and plants adapt to the environment by constantly adjusting the photosynthetic structure and enzyme activity in the Cd2+polluted environment,but in the long time or high concentration of Cd2+polluted environment,the growth and photosynthesis of E.crassipes will be significantly inhibited.关键词
水葫芦/镉污染/光合速率/叶绿素荧光/叶绿体超微结构/H+-ATP酶/RuBP羧化酶/PEP羧化酶Key words
Eichhornia crassipes/Cd pollution/photosynthetic rate/chlorophyll fluorescence/chloroplast ultrastructure/H+-ATP synthetase/RuBP carboxylase/PEP carboxylase分类
资源环境引用本文复制引用
金美芳,郭志英,邹文桐,周莹,林莲婷,林茂兹..水体镉污染对水葫芦光合特性的影响[J].安徽农业大学学报,2025,52(3):420-427,8.基金项目
国家自然科学基金项目(82003903)和福建省自然科学基金项目(2022J01976)共同资助. （82003903）
