The contribution of endophytic bacteria to Albizia lebbeck-mediated phytoremediation of tannery effluent contaminated soil
| Autor: | Muthu Manikandan, Lejla Pašić, Vijayaraghavan Kannan, Mahalingam Kanimozhi, Ordetta Hannah Mendoza, Sechul Chun |
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| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
Albizia lebbeck Chromium DNA Bacterial Marinomonas Firmicutes Molecular Sequence Data Bambusa Bacillus Industrial Waste Albizzia Plant Science 010501 environmental sciences 01 natural sciences RNA Ribosomal 16S Botany Endophytes Environmental Chemistry Soil Pollutants Hyperaccumulator Phylogeny 0105 earth and related environmental sciences biology Bacteria Pseudomonas Fabaceae Tanning Sequence Analysis DNA biology.organism_classification Pollution Phytoremediation Biodegradation Environmental Rhizobium 010606 plant biology & botany |
| Zdroj: | International journal of phytoremediation. 18(1) |
| ISSN: | 1549-7879 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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