학술논문
The contribution of endophytic bacteria to Albizia lebbeck-mediated phytoremediation of tannery effluent contaminated soil.
Document Type
Academic Journal
Author
Manikandan M; a Department of Bioresource and Food Science , Konkuk University , Seoul , Korea.; Kannan V; b Center for Advanced Studies in Botany , University of Madras Guindy Campus , Chennai , India.; Mendoza OH; c Department of Botany , Stella Maris College , Chennai , India.; Kanimozhi M; b Center for Advanced Studies in Botany , University of Madras Guindy Campus , Chennai , India.; Chun S; a Department of Bioresource and Food Science , Konkuk University , Seoul , Korea.; Pašić L; d Department of Biology , Biotechnical Faculty, University of Ljubljana , Ljubljana , Slovenia.
Source
Publisher: CRC Press Country of Publication: United States NLM ID: 101136878 Publication Model: Print Cited Medium: Internet ISSN: 1549-7879 (Electronic) Linking ISSN: 15226514 NLM ISO Abbreviation: Int J Phytoremediation Subsets: MEDLINE
Subject
Language
English
Abstract
Toxicity of chromium often impairs the remediation capacity of plants used in phytoremediation of polluted soils. In this study, we have identified Albizia lebbeck as a prospective chromium hyperaccumulator and examined cultivable diversity of endophytes present in chromium-treated and control saplings. High numbers (22-100%) of endophytic bacteria, isolated from root, stem, and leaf tissues, could tolerate elevated (1-3 mM) concentrations of K2CrO7. 16S rRNA gene sequence-based phylogenetic analysis showed that the 118 isolates obtained comprised of 17 operational taxonomic units affiliated with the proteobacterial genera Rhizobium (18%), Marinomonas (1%), Pseudomonas (16%), and Xanthomonas (7%) but also with members of Firmicutes genera, such as Bacillus (35%) and Salinococcus (3%). The novel isolates belonging to Salinococcus and Bacillus could tolerate high K2CrO7 concentrations (3 mM) and also showed elevated activity of chromate reductase. In addition, majority (%) of the endophytic isolates also showed production of indole-3-acetic acid. Taken together, our results indicate that the innate endophytic bacterial community assists plants in reducing heavy metal toxicity.