Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 183, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2019.109573
Keywords
Bioaccumulation; Aluminum; Cytogenotoxicity assessment; PGPR; Curtobacterium herbarum
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Funding
- Comision Nacional de Investigacion Cientffica y Tecnologica (CONICYT), Government of Chile, through FONDECYT [3170123]
- CONICYT, through FONDECYT Regular [1170264]
- PIA-CONICYT [MEC 80120023]
- [CONICYT/FONDAP/15130015]
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Aluminum (Al) bioaccumulation by a novel Al and drought tolerant Curtobacterium herbarum strain CAH5 isolated from rhizosphere soil of Beta vulgaris grown in acidic Andisols were examined. The rhizobacterial strain also presented important plant growth promoting traits even with Al and drought stresses under in-vitro conditions in broth. In experiments with a 2-6 mM as initial Al concentrations, the percentages of Al removal by bacteria were 89-93% and 78-91% within 72 h incubation under the normal and drought conditions, respectively. Cytogenotoxicity assay revealed that the toxicity of Al was reduced after bioaccumulation process. In the greenhouse study, formulated bio-inoculant CAH5 significantly improves the Lactuca sativa growth under Al and drought stress by reducing oxidative stress, lipid peroxidation and Al accumulation in plant parts. Our results highlighted that strain CAH5 could be used as a promising bioresource for restoration of agricultural soil with presence of phytotoxic Al improving crop production even under drought conditions.
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