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Lactic acid bacteria-enclosing poly(ɛ-caprolactone) microcapsules as soil bioamendment

Paper ID Volume ID Publish Year Pages File Format Full-Text
22298 43267 2008 5 PDF Available
Title
Lactic acid bacteria-enclosing poly(ɛ-caprolactone) microcapsules as soil bioamendment
Abstract

Free plant growth-promoting bacteria in soil bioamendments (SBA) are easily outnumbered by competitors and predators in agricultural soils. Microencapsulation of the bacteria is an effective technique that provides a suitable microenvironment for their survival. In this study, we attempted to prepare poly(ɛ-caprolactone) (PCL) microcapsules enclosing lactic acid bacteria (LAB), a plant growth-promoting bacteria, using the solvent-evaporation method via water-in-oil-in-water (W/O/W) emulsion. Three preparation parameters in the emulsion system were optimized based on the lactic acid production activity of the encapsulated LAB. A sodium alginate aqueous solution suspending the bacteria, a dichloromethane solution with dissolved PCL, and a poly(vinyl alcohol) aqueous solution were used as the inner aqueous phase (Wi), the oil phase (O), and the outer aqueous phase (Wo), respectively. Suitable volume ratio of Wi to O, concentration of sodium alginate in Wi, and the molecular weight of PCL in O were 0.1, 1.0%, and 40 kDa, respectively. The lactic acid production activity of the microcapsules prepared under the optimized conditions was approximately nine times higher than that of commercial SBA. Application to soil demonstrated that the microcapsules are effective in the removal of the root-knot nematodes.

Keywords
microencapsulation; soil bioamendment; lactic acid bacterium; biodegradable; emulsion system
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 106, Issue 3, September 2008, Pages 268–272
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us