Subcellular distribution and chemical forms of cadmium in Phytolacca americana L.

Fu, Xiaoping; Dou, Changming; Chen, Yingxu; Chen, Xincai; Shi, Jiyan; Yu, Mingzhou; Xu, Jie

doi:10.1016/j.jhazmat.2010.10.122

Cited by 301 publications

(127 citation statements)

References 23 publications

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“…Wang et al (2008) observed that in case of Bechmeria nivea (L.) Gaud. (ramie), a promising species for Cd phytoextraction with large biomass and fast growth rate, most of Cd was present in the cell wall and soluble fraction, and similar subcellular distribution pattern has been reported in Phytolacca americana L. (pokeweed) (Fu et al 2011) and Cd-resistant Hordeum vulgare L. (barely) (Wu et al 2005). Additionally, chemical speciation of Cd is closely related to its biological function, and different chemical forms of Cd extracted by different extracting agents have distinct toxicity degree and migration of Cd (Fu et al 2011).…”

Section: Introductionsupporting

confidence: 52%

“…Plant cell walls are principally composed of polyose (including cellulose, hemicellulose and pectin) and protein, providing carboxyl, hydroxyl, amino and aldehyde groups. Therefore, they can bind Cd ions and restrict their transportation across cytomembrane (Fu et al 2011). Besides, 19.61-43.29 % of the total Cd was stored in the soluble fraction, which consisted mostly of vacuoles and acted as the subdominant site of preferential sink for Cd in all test tissues.…”

Section: Resultsmentioning

confidence: 99%

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Phytoremediation of cadmium using plant species of Athyrium wardii (Hook.)

Zhang

Huang

et al. 2013

Int. J. Environ. Sci. Technol.

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Athyrium wardii (Hook.) is a promising herbaceous plant species for phytostabilization of cadmium (Cd)-contaminated sites with large biomass and fast growth rate. However, little information is available on its tolerance mechanisms toward Cd. To further understand the mechanisms involved in Cd migration, accumulation and detoxification, the present study investigated subcellular distribution and chemical forms of Cd in the mining ecotypes and corresponding non-mining ecotypes of A. wardii via greenhouse pot experiment. Subcellular fractionation of Cd-containing tissues demonstrated that the majority of the element was mainly located in soluble fraction in cell walls. This indicated that both the vacuoles and cell walls might be evolved the Cd tolerance mechanisms to protect metabolically active cellular compartments from toxic Cd concentrations. Meanwhile, Cd taken up by the plant existed in different chemical forms. Results showed that the majority of Cd in plant was in undissolved Cd-phosphate complexes (extracted by 2 % CH 3 COOH), followed by water-soluble Cd-organic acid complexes, Cd(H 2 PO 4 ) 2 , pectates and protein form (extracted by deionized water and 1 M NaCl), whereas only small amount of Cd in roots was in inorganic form (extracted by 80 % ethanol), which suggests low capacity to be transported to aboveground tissues. It could be suggested that Cd integrated with undissolved Cd-phosphate complexes in cell wall or compartmentalization in vacuole might be responsible for the adaptation of the mining ecotypes of A. wardii to Cd stress.

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Section: Introductionsupporting

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Phytoremediation of cadmium using plant species of Athyrium wardii (Hook.)

Zhang

Huang

et al. 2013

Int. J. Environ. Sci. Technol.

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show abstract

“…32 Cadmium has deep effects on the composition of cell wall. [33][34][35][36] Huttová et al 37 analyzed changes in peroxidase activity as well as isozyme peroxidase pattern in five cell wall (CW) fractions of barley roots treated with 1 mM cadmium for 48 h and 72 h, whereas strong inhibition of peroxidase activity was observed in fraction CW I and weak inhibition in fractions CW II, III and IV, strong activation of peroxidase was detected in fraction V. Despite the inhibition of enzyme activity in most cell wall fractions, induction of several isoperoxidases was detected after separation on PAGE. 37 Douchiche et al found cadmium treatment induced an increase of the amount of cellulose.…”

Section: Cadmium and Cell Wall Constructionmentioning

confidence: 99%

Cadmium toxicity

Wan

Zhang

2012

Plant Signaling & Behavior

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“…This is also proven by the study of Cd chemical forms in Phytolacca americana L. [2], Kandelia obovata (S., L.) Yong [3] and Porphyra yezoensis [4].…”

mentioning

confidence: 77%

“…Of course, there were different results. For example, in Phytolacca americana L. F3 was the dominating form of Cd in leaves and stems, but the subdominant traction was F1 [2]. These differences might due to the varied Cd and biochar levels applied or the diverse plant species tested.…”

Section: Chemical Forms Of CDmentioning

confidence: 99%