海南热带海洋学院学报2026，Vol.33Issue(2)：50-59,10.DOI:10.13307/j.issn.2096-3122.2026.02.05
泰来草对海水中铜元素的耐受性及其不同器官吸收差异
Tolerance of Thalassia hemprichii to Copper in Seawater and the Absorption Difference Among its Organs
摘要
Abstract
This study examined the tolerance of Thalassia hemprichii to copper(Cu²⁺)contamination in seawater and the differences in Cu2+absorption among its organs through controlled laboratory experiments with Cu² ⁺ gradients of 0～30 μg·L‒1.The accumulation characteristics of Cu2+in the aboveground(leaves),underground(rhizomes and roots),and de-trital tissues,along with physiological indicators including growth rate,photosynthetic products,and antioxidant activity,were systematically analyzed.The results showed that Cu2+content in the underground parts was significantly higher than that in the aboveground tissues(P<0.01),and detritus accumulated more Cu2+,which might facilitate its transfer to sedi-ments through degradation.Low Cu²⁺ concentrations(≤20 μg·L‒1)induced the accumulation of osmoregulatory substances and enhanced antioxidant enzyme(such as SOD)activity.In contrast,when Cu²⁺ concentrations exceeded 20 μg·L‒1,the primary production rate decreased by 16.9%～15.3%,and chlorophyll and SOD activities were significantly reduced(P<0.01).These findings indicate that T.hemprichii adapts to low-level copper pollution by regulating osmoregulatory sub-stances and boosting antioxidant activity,while higher concentrations of Cu²⁺ significantly inhibit its growth and physiologi-cal activity.The study further reveals that T.hemprichii immobilizes Cu2+through an"absorption-burial"mechanism,transferring Cu2+to sediments,effectively reducing the concentration of Cu2+in seawater.The current research provides a theoretical basis for the remediation of heavy metal pollution in seagrass bed ecosystems and offers a reference for the fu-ture control of marine heavy metal pollution.关键词
泰来草/铜/重金属/沉积物/海草Key words
Thalassia hemprichii/copper/heavy metal/sediment/seagrass分类
资源环境引用本文复制引用
刘明中,唐雯,镡蓉蓉,吴浩远,赵牧秋,史云峰..泰来草对海水中铜元素的耐受性及其不同器官吸收差异[J].海南热带海洋学院学报,2026,33(2):50-59,10.基金项目
海南省自然科学基金青年基金项目(423QN250 （）
322QN325) （）
海南热带海洋学院崖州湾创新研究院重大科技计划项目(2022CXYZD002) （2022CXYZD002）
国家自然科学基金地区科学基金项目(42466007) （42466007）
