Testing some wild Bacillus spp. strains as potential biocontrol agents

  • Mihaela Cotârleț Faculty of Food Science and Engineering/ Cross-Border Faculty of Humanities, Economics and Engineering, Dunărea de Jos University, Galaţi, Romania
  • Aurelian-Relu Palade Aectra Agrochemicals S.R.L., Bucharest, Romania
  • Gabriela-Elena Bahrim Faculty of Food Science and Engineering, Dunărea de Jos University, Galaţi, Romania
Keywords: Bacillus spp., antifungal activity, chitinase activity, bio-fungicides

Abstract

The present investigation follows the study of twenty-four Bacillus spp. strains isolated from different samples (compost, municipal waste, crops waste, silage, forest soil, rhizosphere soil, poultry litter, cattle dung and rotting wood) collected from different areas from Galați region, Romania and the assessment of their potential as biocontrol agents against molds. The obtained results demonstrated that the tested indicator fungal strains, Penicillium expansum MIUG M11, Geotrichum candidum MIUG M63, Aspergillus glaucus MIUG M61 and Fusarium graminearum MIUG M59 were sensitive to varying degrees towards the Bacillus spp. action, with growth inhibition degrees ranging from 56.75% to 100%. Four Bacillus spp. isolates possess the ability to produce extracellular chitinase, which could be also used for the control of fungi and insects. By using the radial diffusion method, a hydrolysis zone of
colloidal chitin between 27.0-34.5 mm was highlighted. The selected Bacillus spp. strains can be promising antifungal agents for pest control in agriculture and food industry.

Published
2017-11-19
How to Cite
Cotârleț, Mihaela, Aurelian-Relu Palade, and Gabriela-Elena Bahrim. 2017. “Testing Some Wild Bacillus Spp. Strains As Potential Biocontrol Agents”. The Annals of the University Dunarea De Jos of Galati. Fascicle VI - Food Technology 41 (2), 51-61. https://www.gup.ugal.ro/ugaljournals/index.php/food/article/view/1176.
Issue
Vol 41 No 2 (2017)
Section
ORIGINAL ARTICLES

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