Mechanism of exogenous selenium alleviates cadmium induced toxicity in Bechmeria nivea (L.) Gaud (Ramie) | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

2840210

Reference Type

Journal Article

Title

Mechanism of exogenous selenium alleviates cadmium induced toxicity in Bechmeria nivea (L.) Gaud (Ramie)

Author(s)

Wang, Clin; Liu, Yunguo; Zeng, GM; Hu, XinJ; Ying, YiC; Hu, Xi; Zhou, Lu; Wang, Yaqin; Li, HuaY

Year

2014

Is Peer Reviewed?

Journal

Transactions of Nonferrous Metals Society of China
ISSN: 1003-6326

Volume

Issue

Page Numbers

3964-3970

DOI

10.1016/S1003-6326(14)63557-3

Web of Science Id

WOS:000347620300030

Abstract

The protective role of exogenously supplied selenium (Se6+) on Bechmeria nivea (L.) Gaud (Ramie) subjected to cadmium (Cd) stress was studied in vitro, and the mechanism was discussed by investigating plant growth, malondialdehyde (MDA), activity of antioxidative enzymes and DNA methylation pattern. Plants grown in hydroponic culture were supplied with spraying Se (selenate, 1.2 mu mol/L) and cadmium (Cd(NO3)(2), 0, 3, 6 and 9 mg/L), individually or simultaneously. At low Se spraying levels, SOD activity was increased by 35.34%, 43.18%, 3.63% under 3, 6 or 9 mg/L cadmium contents, POD was increased by 12.45%, 14.14%, 3.27%, and the level of DNA methylation was decreased by 10.70%, 18.18% and 15.59%, respectively. The results confirmed that spraying low Se on ramie leaves could enhance the activity of SOD and POD, and regulate DNA methylation in ramie leaves.

Keywords

ramie; Se; Cd; DNA methylation; antioxidative enzyme; phytoremediation