Volume 120, Issue 4 pp. 2434-2439

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

M. Y. Al-Hetar

M. Y. Al-Hetar

Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia

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M. A. Zainal Abidin

Corresponding Author

M. A. Zainal Abidin

Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia

Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia===Search for more papers by this author
M. Sariah

M. Sariah

Institute of Tropical Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia

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M. Y. Wong

M. Y. Wong

Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia

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First published: 10 December 2010
Citations: 66

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. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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