Integral Characterization of the 16S rRNA Gene of Non-sporulating Bacteria and Its Action Against Anticarsia gemmatalis Hübner (Lepidoptera: Erebidae)

Higor de Oliveira Alves, Mariana Davanzo Miranda, Ricardo Antônio Polanczyk, Joacir do Nascimento, Janete Apparecida Desiderio and Jackson Antônio Marcondes de Souza

Journal of Agricultural Science, 2024, vol. 12, issue 12, 61

Abstract: Brazil is the world’s largest producer of soybean (Glycine max), an extremely important legume due to its source of proteins and essential oils for humans and animals, besides to its applications in the various branches of industry. The velvetbean caterpillar [Anticarsia gemmatalis Hübner (Lepidoptera- Erebidae)] is a great pest that affects this crop and has been controlled by chemical and biological pesticides based on Bacillus thuringiensis. The objectives of this work were to prospect soil microorganisms, to characterize them using the 16S rRNA gene and to perform bioassays to analyze the lethality or subletality of these isolates against A. gemmatalis larvae. The DNA sequencing of the marker gene was complete, covering all conserved regions of it to determine the phylogenetic position of the isolates. Regarding to bioassays, subletality efficacy were low both for sporulant and for the non-sporulant bacterial strains tested. However, based on the signature by complete 16S rRNA analyses of the non-sporulating bacterial isolates, new characteristics worth of studying and prospecting biotechnologically became available.

Date: 2024
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