Abstract
Antagonistic endospore-forming Bacillus spp. offer a large potential as seed inoculants for control of soil-borne pathogens. In the soil, however, inoculated Bacillus endospores may remain dormant without germination, and plant protection can therefore be inefficient and unpredictable. A method based on direct fluorescence microscopy in soil microcosms was used to determine whether low-cost organic additives incorporated into seed coating material could stimulate endospore germination. Complex organic additives supported a high level of endospore germination of the fungal antagonist Paenibacillus polymyxa CM5-5. Skim milk is a low-cost additive that may be incorporated into seed coating material for efficient induction of Bacillus endospore germination in soil.
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