Comparative sensitivity to UV-B radiation of two Bacillus thuringiensis subspecies and other Bacillus sp
| Autor: | Yoel Margalith, Ze'ev Barak, Arieh Zaritsky, Eitan Ben-Dov, Mark Myasnik, Robert Manasherob |
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| Rok vydání: | 2000 |
| Předmět: |
Ultraviolet Rays
Bacterial Toxins Bacillus thuringiensis Bacillus Sigma Factor medicine.disease_cause Applied Microbiology and Biotechnology Microbiology Hemolysin Proteins Bacterial Proteins Species Specificity Botany medicine Spores Bacterial Bacillaceae biology Bacillus thuringiensis Toxins Toxin fungi General Medicine biology.organism_classification Bacillales Spore Endotoxins Cereus Bacteria Plasmids Transcription Factors |
| Zdroj: | Current microbiology. 43(2) |
| ISSN: | 0343-8651 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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