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Abstract(s)
This study evaluated corn steep liquor (CSL) and papaya peel juice (PPJ) in mixture as substrates for thecultivation (96 h, 28◦C, pH 5.6, 150 rpm) of Mucorales fungi for chitosan production, and determinedthe growth-inhibitory effect of the fungal chitosan (FuCS) obtained under optimized conditions againstphytopathogenic Colletotrichum species. All Mucorales fungi tested were capable of growing in CSL-PPJmedium, showing FuCS production in the range of 5.02 (Fennelomyces heterothalicus SIS 28) − 15.63 mg/g(Cunninghamella elegans SIS 41). Highest FuCS production (37.25 mg/g) was achieved when C. eleganswas cultivated in medium containing 9.43% CSL and 42.5% PPJ. FuCS obtained under these conditionsshowed a deacetylation degree of 86%, viscosity of 120 cP and molecular weight of 4.08 × 104g/mol.FuCS at 5000, 7500 and 10,000 ppm inhibited the growth of all Colletotrichum species tested. FuCS alsoinduced alterations in the morphology of C. fructicola hyphae. CSL-PPJ mixtures are suitable substratesfor the cultivation of Mucorales fungi for FuCS production. Chitosan from C. elegans cultivated in CSL-PPJmedium is effective in inhibiting phytopathogenic Colletotrichum species.
Description
Keywords
Agroindustrial by-products Fungal chitosan Antifungal effects
Pedagogical Context
Citation
Berger, L.R.R., Stamford, T.C.M., Oliveira, K.Á.R., Pessoa, A.M.P., Lima, M.A.B., Pintado, M.E., … Souza, E.L. (2018). Chitosan produced from Mucorales fungi using agroindustrial by-products and its efficacy to inhibit Colletotrichum species. International Journal of Biological Macromolecules, 108, 635-641
Publisher
Elsevier