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Antifungal activity of chitosan against Fusarium oxysporum f. sp. cubense.

Al-Hetar, M. Y. and Mior Ahmad, Zainal Abidin and Meon, Sariah and Wong, Mui Yun (2011) Antifungal activity of chitosan against Fusarium oxysporum f. sp. cubense. Journal of Applied Polymer Science, 120 (4). pp. 2434-2439. ISSN 0021-8995

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Official URL: http://dx.doi.org/10.1002/app.33455

Abstract

The in vitro antifungal activity of chitosan against Fusarium oxysporum f. sp. cubense Race 4 (FocR4) the causal agent of banana wilt was investigated. Chitosan at all concentrations tested reduced the hyphal growth of FocR4 on potato dextrose agar media and recording maximum inhibition of 76.36% at 8 mg/mL. The inhibitory effect was found to increase as chitosan concentration increases. The 50% effective concentration value was estimated by probit analysis, and it was 1.4 mg/mL. Chitosan was more effective in potato dextrose broth where it completely inhibited the mycelial growth of FocR4 at all concentrations tested. Chitosan inhibited the sporulation of FocR4 by a maximum of 96.53% at 8 mg/mL chitosan, and 100% inhibition for spore germination was recorded at all concentrations tested. Chitosan at concentrations of more than 1.6 mg/mL was also found to induce morphological changes in FocR4 characterized by agglomeration of hyphae, abnormal shapes, vesicles, or empty cells devoid of cytoplasm in the mycelia.

Item Type:Article
Keyword:Chitosan; Fusarium oxysporum; Antifungal; Banana wilt
Faculty or Institute:Faculty of Agriculture
Publisher:Wiley Online Library
DOI Number:10.1002/app.33455
ID Code:23651
Deposited By: Nur Farahin Ramli
Deposited On:29 Nov 2013 16:15
Last Modified:10 Feb 2016 08:42

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