EXOPOLYSACCHARIDES AND ABIOTIC STRESS TOLERANCE IN BACTERIAL ISOLATES FROM 'SABIÁ' NODULES
| Autor: | CYBELLE SOUZA OLIVEIRA, MARIO ANDRADE LIRA JUNIOR, NEWTON PEREIRA STAMFORD, JÚLIA KUKLINSKY-SOBRAL, FATIMA MARIA SOUZA MOREIRA |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Revista Caatinga, Vol 27, Iss 4, Pp 240-245 (2014) |
| Druh dokumentu: | article |
| ISSN: | 0100-316X 1983-2125 |
| Popis: | Several microorganisms produce polysaccharides, deemed to protect the bacteria from several environmental stresses. This paper aims to evaluate the protective effect of exopolyssacharides to different abi- otic stresses in bacterial isolates from “sabiá” ( Mimosa caesalpiniifolia ) nodules. 303 fast growing isolates were qualitatively evaluated for exopolyssacharide production and tested in vitro for tolerance to two levels of acidity, joint aluminum and acidity, three salinity levels; 11 antibiotics and three herbicides. Most isolates re- sisted media acidity, acidity with aluminum, salinity, and ampicillin, cefotaxime, gentamicin and vancomycin antibiotics and 2,4D herbicide, while being sensitive to ciprofloxacin, chloramphenicol, streptomycin, kanamy- cin, nalidixic acid, rifampicin and tetracycline antibiotics and paraquat and glyphosate herbicides. There was no connection between exopolyssacharide production and abiotic stress tolerance. |
| Databáze: | Directory of Open Access Journals |
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