Characterization of Heavy Metal-Resistant Endophytic Yeast Cryptococcus sp CBSB78 from Rapes (Brassica chinensis) and Its Potential in Promoting the Growth of Brassica spp. in Metal-Contaminated Soils

被引：33
|
作者：
Deng, Zujun [2 ]
Wang, Wenfeng [1 ]
Tan, Hongming [1 ]
Cao, Lixiang [1 ]
机构：
[1] Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510275, Guangdong, Peoples R China
[2] Guangdong Pharmaceut Univ, Sch Basic Courses, Guangdong Prov Key Lab Pharmaceut Bioact Subst, Guangzhou 510006, Guangdong, Peoples R China
来源：
WATER AIR AND SOIL POLLUTION | 2012年 / 223卷 / 08期
关键词：
Endophytic yeasts; Phytoremediation; Bioaugmentation; Brassica; Heavy metal; VAR. FOLIOSA BAILEY; MOLECULAR-MECHANISMS; MARINE-SEDIMENTS; PLANT-GROWTH; BACTERIA; PHYTOREMEDIATION; FUNGI; PHYTOEXTRACTION; BIOREMEDIATION; CD;
D O I：
10.1007/s11270-012-1282-6
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A Cd-, Pb-, Zn-, Cu-resistant endophytic yeast CBSB78 was isolated from surface-sterilized rape roots. The isolate was identified as Cryptococcus sp. based on the ITS1-5.8S-ITS2 sequence analysis. The strain was resistant to 20 mM Cd2+, 20 mM Pb2+, 10 mM Zn2+, and 7 mM Cu2+. The yeast CBSB78 was a low indole-3-acetic acid (IAA) producer and possessed low 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity. Overall, 29.4-244 % of survival rates increased and the dry weight of Brassica alboglabra showed a 41.1 % increase when it was inoculated into the seedlings. The inoculation of CBSB78 could also increase the extraction amounts of Cd, Pb, and Zn by B. alboglabra simultaneously in the multi-metal contaminated soils, which showed the potential to improve extraction efficacy of Cd, Pb, Zn by B. alboglabra seedlings in the field.
引用
收藏
页码：5321 / 5329
页数：9
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