Electrospun microbial-encapsulated composite based plasticized seed-coat for rhizosphere stabilization and sustainable production of canola (Brassica napus L.).

08:00 EDT 15th April 2019 | BioPortfolio

Summary of "Electrospun microbial-encapsulated composite based plasticized seed-coat for rhizosphere stabilization and sustainable production of canola (Brassica napus L.)."

Plant growth-promoting bacteria show promises in crop production, nevertheless, innovation in their stable delivery is required for practical use by farmers. Herein, the composite of poly(vinyl alcohol)/poly(vinylpyrrolidone) plasticized with glycerol and loaded with the microbial consortium (Bacillus subtilis plus Seratia marcescens) was fabricated and engineered onto canola (Brassica napus L.) seed via electrospinning. Scanning electron microscopy showed that biocomposite is a one-di-mensional membrane which encapsulated microbes in multilayered nanostructure and their interfacial behavior between microorganism and seed is beneficial for safer farming. Universal testing machine and thermogravimetric analysis demonstrated that biocomposite holds sufficient thermo-mechanical properties for stable handling and practical management. Spectroscopic study resolved the living hybrid-polymer structure of biocomposite and proved the plasticizing role of glycerol. Swelling study supports the degradation of biocomposite in the hydrophilic environment due to the leaching of plasticizer which is important for the sustained release of microbial cells. Shelf-life study supported that biocomposite seed-coat place threshold level of microbes (5.675 ± 0.48 log10 CFU/g)) and maintained their satisfactory viability for 15th-days at the room temperature. Antifungal and nutrient-solubilizing study supported that biocomposite seed-coat could provide opportunities to biocontrol diseases and improve nutrient acquisition by the plant. Pot study document the better performance of biocomposite seed-coat on seed germination, seedling growth, leaf area, plant dry biomass, and root system. Chemical and microbial study demonstrated that biocomposite seed-coat improved the effectiveness of bioinoculant in the root-soil interface where they survive, flourish and increase the nutrient pool status. In particular, this study present advances in the fabrication of biocomposite for encapsulation, preservation, sustained release and efficacious use of microorganisms onto seed for precision farming.


Journal Details

This article was published in the following journal.

Name: Journal of agricultural and food chemistry
ISSN: 1520-5118


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