title: The influence of flavonoid amendment on the absorption of cadmium in Avicennia marina roots.
abstract: Flavonoid is a key factor for the tolerance to cadmium in plants. Concentration-dependent kinetics experiment was conducted to investigate the influence of flavonoid amendment on the Cd(2+) uptake in Avicennia marina (Forsk) Vierh. roots. We found that compared with the control, saturation concentration and maximal absorption rate of Cd was higher under flavonoid amendment (p<0.05). When roots were exposed to ion transport inhibitor (LaCl3), flavonoid amendment also facilitated Cd transport in roots. Flavonoids had no influence on Cd(2+) uptake in root cell walls. In conclusion, flavonoids enhance the tolerance to Cd and have a significant stimulative effect on symplasm transport of Cd in A. marina roots. Ca(2+)-channel was not the unique means of symplasm transport for Cd(2+) absorption.
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China.
authors.forename: Haoliang
authors.initials: H
authors.lastname: Lu
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China.
authors.forename: Jingchun
authors.initials: J
authors.lastname: Liu
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China.
authors.forename: Hualong
authors.initials: H
authors.lastname: Hong
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China. Electronic address: ycl@xmu.edu.cn.
authors.forename: Chongling
authors.initials: C
authors.lastname: Yan
mesh_terms: D032407:Avicennia / Q000187:drug effects*; D002104:Cadmium / Q000378:metabolism*; D005419:Flavonoids / Q000494:pharmacology*; D018517:Plant Roots / Q000378:metabolism*
chemical_list: D005419:Flavonoids; D002104:Cadmium
keywords: Avicennia marina; Cadmium; Flavonoid; Mangrove