title: [Effect of different zinc levels on accumulation and chemical forms of cadmium, and physiological characterization in Capsicum annuum L].
abstract: Pot experiments were carried out to investigate the influence of different zinc (Zn) levels (0, 100, 200, 400 and 600 micromol x L(-1)) on the plant growth,activities of antioxidant enzymes, contents of chlorophyll a and b, accumulation and chemical forms of cadmium (Cd) in Capsicum annuum L. when exposed to Cd (20 mg x kg(-1)). The results showed that dry weights of leaf, stem, fruit and root, and contents of chlorophyll a and b in Capsicum annuum L. were increased by Zn ( < or = 400 micromol x L(-1)), while inhibited by high Zn (600 micromol x L(-1)). Activities of superoxide dismutase (SOD) and catalase (CAT) were reduced by Zn ( < or =400 micromol x L(-1)), the lowest activities of SOD and CAT were recorded in 400 micromol x L(-1) Zn, but activities of SOD and CAT were increased when Zn >400 micromol x L(-1). Cadmium concentrations in stem, fruit and root of Capsicum annuum L. were decreased by 2.7%-5.4%, 7.5%-28.1% and 7.6%-21.8% in the presence of Zn when exposed to Cd. The total extractable Cd, NaCl- extractable Cd, water-extractable Cd and ethanol-extractable Cd in fruit were reduced by 7.7%-21.8%, 4.11%-23.6%, 54.5%-66.8% and 4.8%-86.7% in the presence of Zn,while acetic acid- extractable Cd and residual Cd were increased by 28.0%-68.0% and 12.6%-25.0%.
authors.affiliation: College of Resources and Environmental Sciences, Southwest University, Chongqing 400716, China. chenguiqing3807@sina.com
authors.forename: Gui-qing
authors.initials: GQ
authors.lastname: Chen
authors.forename: Xiao-jing
authors.initials: XJ
authors.lastname: Zhang
authors.forename: Wei-Hong
authors.initials: WH
authors.lastname: Xu
authors.forename: Ji-zhen
authors.initials: JZ
authors.lastname: Liu
authors.forename: Hui-xian
authors.initials: HX
authors.lastname: Wang
authors.forename: Liu-ming
authors.initials: LM
authors.lastname: Guo
authors.forename: Lu-hao
authors.initials: LH
authors.lastname: Chen
authors.forename: Hai-bo
authors.initials: HB
authors.lastname: Zhang
authors.forename: Chun-tao
authors.initials: CT
authors.lastname: Lan
authors.forename: Hong-jun
authors.initials: HJ
authors.lastname: Zeng
authors.forename: Zhi-ting
authors.initials: ZT
authors.lastname: Xiong
mesh_terms: D000042:Absorption; D002104:Cadmium / Q000037:antagonists & inhibitors* / Q000378:metabolism*; D002212:Capsicum / Q000254:growth & development / Q000378:metabolism* / Q000502:physiology; D004785:Environmental Pollutants / Q000037:antagonists & inhibitors / Q000378:metabolism; D015032:Zinc / Q000494:pharmacology*
chemical_list: D004785:Environmental Pollutants; D002104:Cadmium; D015032:Zinc