title: Cd accumulation and subcellular distribution in two ecotypes of Kyllinga brevifolia Rottb as affected by Cd treatments.
abstract: The Cadmium (Cd) accumulation capacity and subcellular distribution in the mining ecotype (ME) and non-mining ecotype (NME) of Kyllinga brevifolia Rottb were investigated in pot experiments. The results showed that average Cd contents in shoots of the two ecotypes of K. brevifolia were higher than those in roots, whereas Cd concentrations in roots were greater than those in shoots. Also, shoot Cd contents in NME of K. brevifolia were 1.65-45.45 times greater than those in ME when the plants were grown at 5, 25, 50, and 100 mg Cd kg(-1) soil. Moreover, Cd contents in the roots in NME were 1.75-45.45 times higher than those in ME. Subcellular distribution of Cd demonstrated that the majority of Cd in the two ecotypes of K. brevifolia was distributed in the cell walls and soluble fraction, and a small percentage of Cd existed in organelle fraction. In addition, proportions of Cd distributed in shoots and roots cell walls of NME were greater than those in ME. It could be assumed that compared with ME, NME of K. brevifolia has better Cd accumulation capacity, and the subcellular distribution of Cd might be one of the mechanisms to explain such phenomena.
authors: College of Resources and Environmental Science, Sichuan Agricultural University, Huimin Road 211#, Chengdu, 611130, Sichuan, People's Republic of China.
authors: Xiaoqing
authors: X
authors: Hao
authors: Tingxuan
authors: T
authors: Li
authors: Haiying
authors: H
authors: Yu
authors: Xizhou
authors: X
authors: Zhang
authors: Zicheng
authors: Z
authors: Zheng
authors: Guangdeng
authors: G
authors: Chen
authors: Shujin
authors: S
authors: Zhang
authors: Li
authors: L
authors: Zhao
authors: Yong
authors: Y
authors: Pu
mesh_terms: D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D029785:Cyperaceae / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D060146:Ecotype; D008906:Mining; D018517:Plant Roots / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D012989:Soil Pollutants; D002104:Cadmium