Effects of Cu Treatment Coupled with Ultraviolet Radiation on Photosynthetic Physiological Characteristics of Ulva lactuca
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;0.25 μmol/L,MCu;0.50 μmol/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 re-sults 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 de-creased 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.
Ulva lactucaultraviolet radiationheavy metal Cuphotosynthetic physiological
NETL
NSTL
万方数据
