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A UV Tolerant Mutant of Bacillus thuringiensis subsp. kurstaki Producing Melanin

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Abstract

A UV-resistant mutant (Bt-m) of Bacillus thuringiensis subsp. kurstaki, producing a dark brown pigment, identified as melanin, was studied. Bt-m had higher larvicidity against Heliothis armigera than its parent. Survival of Bt-m spores and their insecticidal activity to irradiation at 254 nm and 366 nm were higher than those of the parent. The only toxic polypeptide produced by Bt-m was Cry1Ac (130 kDa); it lost cry1Aa, cry2Aa, and cry2Ab.

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Authors and Affiliations

  1. Department of Life Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Be'er-Sheva 84105, Israel, , , , , , IL

    Deepak Saxena, Eitan Ben-Dov, Robert Manasherob, Ze'ev Barak & Arieh Zaritsky

  2. Microalgal Biotechnology Laboratory, Blaustein Institute for Desert Research, Ben-Gurion University at Sede-Boker, 84990, Israel, , , , , , IL

    Sammy Boussiba

Authors
  1. Deepak Saxena
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  2. Eitan Ben-Dov
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  3. Robert Manasherob
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  4. Ze'ev Barak
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  5. Sammy Boussiba
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  6. Arieh Zaritsky
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Received: 2 April 2001 / Accepted: 14 May 2001

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Saxena, D., Ben-Dov, E., Manasherob, R. et al. A UV Tolerant Mutant of Bacillus thuringiensis subsp. kurstaki Producing Melanin. Curr Microbiol 44, 25–30 (2002). https://doi.org/10.1007/s00284-001-0069-6

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  • DOI: https://doi.org/10.1007/s00284-001-0069-6

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