Comparative sensitivity to UV-B radiation of two Bacillus thuringiensis subspecies and other Bacillus sp.

Mark Myasnik, Robert Manasherob, Eitan Ben-Dov, Arieh Zaritsky, Yoel Margalith, Ze'ev Barak

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Susceptibility of Bacillus thuringiensis spores and toxins to the UV-B range (280-330 nm) of the solar spectrum reaching Earth's surface may be responsible for its inactivation and low persistence in nature. Spores of the mosquito larvicidal B. thuringiensis subsp. israelensis were significantly more resistant to UV-B than spores of the lepidopteran-active subsp. kurstaki. Spores of subsp. israelensis were as resistant to UV-B as spores of B. subtilis and more resistant than spores of the closely related B. cereus and another mosquito larvicidal species B. sphaericus. Sensitivity of B. thuringiensis subsp. israelensis spores to UV-B radiation depended upon their culture age; 24-h cultures, approaching maximal larvicidal activity, were still sensitive. Maximal resistance to UV-B was achieved only at 48 h.

Original languageEnglish
Pages (from-to)140-143
Number of pages4
JournalCurrent Microbiology
Volume43
Issue number2
DOIs
StatePublished - 16 Jul 2001

ASJC Scopus subject areas

  • Microbiology
  • Applied Microbiology and Biotechnology

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