Effects of Cd,Pb, Zn,Cu-Resistant Endophytic Enterobactersp. CBSB1 and RhodotorulaSp. CBSB79 on the Growth and Phytoextraction of Brassica Plants in Multimetal Contaminated Soils |
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| Authors: | Wenfeng Wang Zujun Deng Hongming Tan Lixiang Cao |
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| Institution: | 1. Guangdong Key Laboratory of Plant Resources, School of Life Sciences , Sun Yat-sen University , Guangzhou , P. R. China;2. School of Basic courses, Guangdong Provincial Key Laboratory of Pharmaceutical Bioactive Substances , Guangdong Pharmaceutical University , Guangzhou , P. R. China |
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| Abstract: | To survey the effects of endophytic Enterobacter sp. CBSB1 and Rhodotorula sp. CBSB79 resistant to Cd2+, Pb2+, Zn2+, and Cu2+ on the growth and phytoextraction of Brassica, the endophytes were isolated by surface- sterilized methods and characterized. The CBSB1 significantly increased 44.2% of the dry weight of Brassica napus in the multimetal contaminated soil (P < 0.05) and showed no effect or declined the dry weight of B. alboglabra, B. campestris ssp. chinensis var. cummunis, B. campestris ssp. chinensis var. utilis cv. Youqing12, B. campestris ssp. chinensis var. utilis cv. Lvbao701 plants. The dry weights of B. napus, B. campestris ssp. chinensis var. utilis, and B. alboglabra showed a significant increase when the CBSB79 was inoculated (P < 0.05). In general, inoculation with bacteria and yeast did not greatly alter the metal concentration in plant tissues. Compared to Enterobacter sp. CBSB1, the yeast Rhodotorula sp CBSB79 showed higher potentials to improve extraction efficacy of Cd, Pb, Zn, and Cu by Brassica seedlings in the field. |
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| Keywords: | Brassica phytoremediation endophytes metal resistant yeasts |
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