The most recent results of Vincent, a PhD student, were recently accepted in the journal Molecular Plant-Microbe Interactions (MPMI)! His work characterizes germination and sporulation of Bacillus subtilis on Arabidopsis thaliana roots. We observed that spores inoculated on A. thaliana seedlings germinate rapidly, but the vegetative state does not last since bacteria revert back to being spores a few days later. Additionally, A. thaliana seedlings appear to stimulate sporulation of the surrounding B. subtilis when there are direct contacts between plants and plant growth-promoting rhizobacteria (PGPRs). This fundamental study has important implication at an applied level, since Bacillus-based biofertilizers are sprayed as spores on plants in agricultural settings. However, abundance and persistent of this dormant state, which is possibly less beneficial for the plant, was never examined. Our study is one of the first that investigates this question, and will allow us to optimize the usage of Bacillus species as plant-beneficial bacteria. Interested? Read more here : https://apsjournals.apsnet.org/doi/10.1094/MPMI-10-18-0278-R . Congratulation Vincent!
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