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      Screening of Cyanobacteria (Blue-Green algae) from Rice Paddy Soil for Antifungal Activity against Plant Pathogenic Fungi

      research-article
      Mycobiology
      The Korean Society of Mycology
      Antibiotics, Antifungal activity, Cyanobacteria, Rice paddy filed, Soil

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          Abstract

          Soil cyanobacteria isolated from the rice paddy fields of 10 different locations across Korea were evaluated by agar plate diffusion test for antifungal activity. Aqueous, petroleum ether, and methanol extracts from one hundred and forty two cyanobacterial strains belonging to the 14 genera were examined for antifungal properties against seven phytopathogenic fungi causing diseases in hot pepper ( Capsicum annuum L). Of total cyanobacteria, nine cyanobacteria (6.34%) exhibited antifungal effects. The nine cyanobacteria selected with positive antifungal activities were two species of Oscillatoria, two of Anabaena, three of Nostoc, one of Nodularia, and one of Calothrix. Alternaria alternata and Botrytis cinerea were inhibited by nine and eight species of cyanobacteria, respectively. Rhizopus stolonifer was suppressed by only methanol extract of Nostoc commune FK-103. In particular, Nostoc commune FK-103 and Oscillatoria tenuis FK-109 showed strong antifungal activities against Phytophthora capsici. Their antifungal activity at the late exponential growth phase is related to the growth temperature and not associated with the growth parameters such as cell biomass and chlorophyll-α concentration. The high inhibition levels of antibiotics were 22.5 and 31.8 mm for N. commune FK-103 and O. tenuis FK-109, respectively. The optimal temperature for antibiotic productivity was 35℃.

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          Most cited references40

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          Cyanobacteria secondary metabolites--the cyanotoxins.

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            The potential for using cyanobacteria (blue-green algae) and algae in the biological control of plant pathogenic bacteria and fungi

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              Simple conditions for growth of unicellular blue-green algae on plates

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                Author and article information

                Journal
                Mycobiology
                Mycobiology
                MB
                Mycobiology
                The Korean Society of Mycology
                1229-8093
                2092-9323
                September 2006
                30 September 2006
                : 34
                : 3
                : 138-142
                Affiliations
                Institute of Industrial Biotechnology, Department of Biological Engineering, Inha University, Incheon 402-751, Korea.
                Author notes
                Corresponding author ( jdkim@ 123456inha.ac.kr )
                Article
                10.4489/MYCO.2006.34.3.138
                3769562
                24039487
                ac717898-a46f-497f-a366-ecfc79a04dc2
                Copyright © 2006 by The Korean Society of Mycology

                This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 31 August 2006
                Categories
                Research Article

                Plant science & Botany
                soil,cyanobacteria,antibiotics,rice paddy filed,antifungal activity
                Plant science & Botany
                soil, cyanobacteria, antibiotics, rice paddy filed, antifungal activity

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