A newly found cadmium accumulator--Malva sinensis Cavan.
Screening hyperaccumulators and accumulators is a key step in the phytoremediation of soils contaminated by heavy metals. A pot experiment was conducted involving a soil Cd concentration gradient (0, 50, 75, 100, 125, 150, 175, and 200 mg kg(-1)) to determine if Malva sinensis Cavan. from two lead-zinc mines in Kangding and Yajiang in western Sichuan, China, is a Cd-hyperaccumulator. The highest Cd concentrations in plant shoots from Kangding and Yajiang were 154.30 and 122.77 mg kg(-1), respectively, at a soil Cd concentration of 200 mg kg(-1). The largest amounts of accumulation in plant shoots from Kangding and Yajiang were 700.5 and 1403.2 microg pot(-1), respectively. The bioconcentration factors in shoots were 0.53-1.03 for Kangding and 0.69-1.25 for Yajiang. Moreover, all translocation factors of plants from the two sites were over 1.0. Therefore, M. sinensis can be classified as a Cd-accumulator or non-standard Cd-hyperaccumulator.
Zhang
Shirong
S
College of Resources and Environment, Sichuan Agricultural University, 46 Xinkang Road, Yaan 625014, PR China. rsz01@163.com
Chen
Mingying
M
Li
Ting
T
Xu
Xiaoxun
X
Deng
Liangji
L
D018533:Biomass; D002104:Cadmium / Q000737:chemistry / Q000378:metabolism* / Q000633:toxicity; D028501:Malva / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D018517:Plant Roots / Q000737:chemistry; D018520:Plant Shoots / Q000737:chemistry / Q000378:metabolism; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000737:chemistry / Q000378:metabolism* / Q000633:toxicity
D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium