title: Cadmium (Cd) Localization in Tissues of Cotton (Gossypium hirsutum L.), and Its Phytoremediation Potential for Cd-Contaminated Soils.
abstract: Phytoremediation using economically valuable, large biomass, non-edible plants is a promising method for metal-contaminated soils. This study investigated cotton's tolerance for Cd and remediation potential through analyzing Cd bioaccumulation and localization in plant organs under different soil Cd levels. Results showed cotton presents good tolerance when soil Cd concentration ≤20.26 mg kg(-1). Cotton had good Cd accumulation ability under low soil Cd levels (<1.26 mg kg(-1)), with a TF value (the ratio of Cd concentration in stem to root) above 1. Energy dispersive X-ray microanalysis indicated cotton leaf transpiration played a key role in extracting soil Cd, while roots and stems were the main compartments of Cd storage. Cd complexation to other organic constituents in root and stem cell sap could be a primary detoxifying strategy. Therefore, cotton is a potential candidate for phytoremediation of Cd-contaminated soils.
authors.affiliation: Institute of Resources and Environment, College of Environment and Planning, Henan University, Kaifeng, 475004, China. pingfan0604@aliyun.com.
authors.forename: Zhifan
authors.initials: Z
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Institute of Resources and Environment, College of Environment and Planning, Henan University, Kaifeng, 475004, China.
authors.forename: Lidong
authors.initials: L
authors.lastname: Fan
authors.affiliation: Institute of Resources and Environment, College of Environment and Planning, Henan University, Kaifeng, 475004, China.
authors.forename: Liteng
authors.initials: L
authors.lastname: Xing
authors.affiliation: Institute of Resources and Environment, College of Environment and Planning, Henan University, Kaifeng, 475004, China.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Yang
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D003368:Gossypium / Q000378:metabolism*; D018515:Plant Leaves / Q000737:chemistry / Q000378:metabolism; D018517:Plant Roots / Q000737:chemistry / Q000378:metabolism; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium
keywords: Bioaccumulation; Cotton plant; Energy dispersive X-ray microanalysis; Heavy metal; Tolerance