Cu处理耦合紫外辐射对石莼光合生理特性的影响  

Effects of Cu Treatment Coupled with Ultraviolet Radiation on Photosynthetic Physiological Characteristics of Ulva lactuca

作　　者：丁厚旭 陆周玥 曹君旸 雍康馨 岑永华 徐军田 马静 DING Houxu;LU Zhouyue;CAO Junyang;YONG Kangxin;CEN Yonghua;XU Juntian;MA Jing(School of Marine Science and Fisheries,Jiangsu Ocean University,Lianyungang 222005,China;Jiangsu Key Laboratory of Marine Bioresources and Environment,Jiangsu Ocean University,Lianyungang 222005,China;Co-innovation Center of Jiangsu Marine Bio-industry Technology,Jiangsu Ocean University,Lianyungang 222005,China;Jiangsu Maritime Law Enforcement Supervision Center,Nantong 226006,China)

机构地区：[1]江苏海洋大学海洋科学与水产学院,江苏连云港222005 [2]江苏海洋大学江苏省海洋生物资源与环境重点实验室,江苏连云港222005 [3]江苏海洋大学江苏省海洋生物产业技术协同创新中心,江苏连云港222005 [4]江苏省海域执法监督中心,江苏南通226006

出　　处：《江苏海洋大学学报（自然科学版）》2024年第4期9-17,共9页Journal of Jiangsu Ocean University:Natural Science Edition

基　　金：国家自然科学基金资助项目(42106089);江苏高校“青蓝工程”资助项目;江苏省高校优势学科发展计划项目;连云港市521科研项目(LYG06521202397,LYG06521202129)。

摘　　要：为探明重金属污染和太阳紫外线(UV)辐射对大型海藻光合生理特性的影响,实验分析了3个Cu浓度(自然海水,LCu;0.25μmol/L,MCu;0.50μmol/L,HCu)和两种紫外辐射(光合有效辐射,PAR和紫外辐射,PAB)对石莼光合生理特性的影响。结果表明,HCu处理下石莼的相对生长速率比对照组降低18.09%,经过PAR和PAB照射处理后,石莼Yield值随照射时间延长呈现不断下降的趋势,且经PAB处理后,其Yield值比经PAR处理的石莼更低,且低光修复后,HCu处理组Yiled最低,尽管HCu条件下石莼的光合作用速率比对照组增加了65.13%。这些结果表明,藻体在海洋环境中可能对UV辐射更敏感,且紫外辐射耦合高浓度Cu会加剧对藻体的毒性效应。研究为进一步评估未来环境变化对海洋初级生产力的影响提供了实验数据。To investigate the effects of heavy metal pollution and solar ultraviolet(UV)radiation on the photosynthetic physiological characteristics of macroalgae,this experiment analyzed the effect of three Cu concentrations(natural seawater,LCu;0.25μmol/L,MCu;0.50μmol/L,HCu)and two different UV radiation treatments(photosynthetically active radiation,PAR and UV radiation,PAB)on the photosynthetic physiological characteristics of Ulva lactuca.The results showed that the relative growth rate of U.lactuca under HCu treatment decreased by 18.09%compared to the LCu.After PAR and PAB irradiation,the Yield of U.lactuca decreased continuously with prolonged irradiation time,and after PAB treatment,the Yield was lower than that of thalli treated with PAR.After low light recovery,the HCu treatment group had the lowest Yield,although the photosynthetic rate of thalli under HCu conditions increased by 65.13%compared to the control group(LCu).These results suggest that algae may be more sensitive to UV radiation in the marine environment,and the coupling of UV radiation with HCu can exacerbate the toxic effects on U.lactuca.This study provides a theoretical basis for further evaluating the impact of future environmental changes on marine primary productivity.

关 键 词：石莼 紫外辐射 重金属CU 光合生理 

分 类 号：P735[天文地球—海洋生物学]