Eco-Friendly Biomass Production and Identification of Active Compounds of Paenibacillus polymyxa EB.KN35 with Potent Anti-Fusarium oxysporum Effect
Van Anh Ngo, Anh Dzung Nguyen, San-Lang Wang, Tu Quy Phan, Thi Ha Trang Tran, Dinh Sy Nguyen, Van Bon Nguyen
TL;DR
This study identifies Paenibacillus polymyxa EB.KN35 as a powerful eco-friendly solution for controlling the plant pathogen Fusarium oxysporum using agricultural byproducts.
Contribution
The novel use of a soybean processing byproduct for efficient biomass production of P. polymyxa EB.KN35 is demonstrated.
Findings
P. polymyxa EB.KN35 achieved high biomass productivity (3.46 × 10¹¹ CFU/mL) in 8 hours using a soybean byproduct.
The strain secretes plant growth-promoting compounds and volatile compounds that inhibit F. oxysporum.
Docking studies suggest specific volatile compounds may significantly inhibit the pathogen.
Abstract
Fusarium oxysporum is a fungal plant pathogen for over 100 agricultural crop species. There are strategies for managing Fusarium wilt, including antagonistic bacteria that offer a promising and sustainable effect. In this work, among the various endophytic bacterial strains, Paenibacillus polymyxa EB.KN35 was selected as the best antifungal strain against F. oxysporum. For eco-friendly biomass production of this bacterium, some agricultural byproducts were tested for cultivation, and a soybean processing byproduct (SPBP) was found to be a suitable C/N source for P. polymyxa EB.KN35 fermentation. The utilization of a 14 L bioreactor system for P. polymyxa EB.KN35 fermentation achieved a high biomass productivity (3.46 × 1011 CFU/mL) in a short time (8 h). In bioactive compound analysis, EB.KN35 was found to be secreting several plant growth-promoting compounds such as GA3, IAA, kinetin,…
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Taxonomy
TopicsPlant-Microbe Interactions and Immunity · Plant tissue culture and regeneration · Plant Pathogens and Fungal Diseases