Abstract
The factors suppressing division of the cells of the rhizobacterium Azospirillum brasilense and inducing their transition to a dormant state were analyzed. These included the presence of hexylresorcinol or heavy metals (Cu and Co) in the medium, oxygen stress, and transfer of the cells into the physiological saline or phosphate buffer solution. The results were used to develop a protocol for obtaining of nonculturable cells of A. brasilense Sp245, a natural symbiont of wheat. The cells lost their ability to grow on synthetic agar medium, but could revert to growth when incubated in freshly prepared liquid medium. Needle-shaped crystals differing from struvite, which has been previously reported for this strain, were found in the dormant culture of A. brasilense Sp245.
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Original Russian Text © M.A. Kushneruk, A.V. Tugarova, A.V. Il’chukova, E.A. Slavkina, N.I. Starichkova, V.A. Bogatyrev, L.P. Antonyuk, 2013, published in Mikrobiologiya, 2013, Vol. 82, No. 5, pp. 563–570.
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Kushneruk, M.A., Tugarova, A.V., Il’chukova, A.V. et al. Factors inducing transition from growth to dormancy in rhizobacteria Azospirillum brasilense . Microbiology 82, 572–578 (2013). https://doi.org/10.1134/S0026261713050081
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DOI: https://doi.org/10.1134/S0026261713050081