海洋科学2016，Vol.40Issue(4)：65-72,8.DOI:10.11759//hykx20140804002
重金属Cu2+胁迫对红树植物秋茄幼苗生长及某些生理特性的影响
Growth and physiological characteristics ofKandelia obovata seedlings under Cu2+ stress
摘要
Abstract
To reveal the toxic effects of copper on mangroves and the mechanism of plant resistance, the growth of Kandelia obovata seedlings, changes in some of their physiological indices, and the accumulation of copper in them under different copper concentrations were investigated for 90 days. The main parameters that were determined included main root length, lateral root number, biomass, photosynthetic rate, pigment content, soluble sugar and protein contents, and antioxidant enzyme activities. The results showed marked reductions in the main root length, lateral root number, biomass, photosynthetic rate, pigment content, and soluble sugar and protein contents with in-creasing copper concentration. POD activity was more sensitive to copper stress in the roots than in the leaves. The activities of SOD and CAT first increased and then decreased as the copper concentration increased. The MDA content in the roots remained relatively stable under copper stress, whereas its content in the leaves increased under a high concentration of copper. Copper absorbed byK. obovata was mainly accumulated in the roots, and only a small amount of copper was transferred to the aboveground plant parts. The growth and physiological characteris-tics of the plant indicated thatK. obovata tolerated copper concentrations of approximately 5–50 mg/L.关键词
红树植物/秋茄(Kandelia obovata)/Cu2+/抗氧化酶/累积Key words
mangrove/Kandelia obovata/Cu2+/antioxidant enzymes/accumulation分类
农业科技引用本文复制引用
赵胡,唐俊,郑文教..重金属Cu2+胁迫对红树植物秋茄幼苗生长及某些生理特性的影响[J].海洋科学,2016,40(4):65-72,8.基金项目
国家自然科学青年基金(41001189) （41001189）
安徽省教育厅自然科学基金(2015KJ006) （2015KJ006）
阜阳师范学院自然科学基金校级重点项目(2013FSKJ04ZD)[Foundation：National Natural Science Foundation of China, No.41001189 （2013FSKJ04ZD）
Natur-al Science Foundations of the Anhui Bureau of Education, No.2015KJ006 （）
Natu-ral Science Foundations of Fuyang Normal Colege, No.2013FSKJ04ZD] （）
