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

Kim, Jeong-Dong

doi:10.4489/myco.2006.34.3.138

Cited by 52 publications

(39 citation statements)

References 22 publications

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“…There are reports on antimicrobial effects from microalgal aqueous and organic solvent extractand have been visualized in bioassays using selected microorganisms. In the investigations, microalgae have demonstrated the antimicrobial effects of many strains likeNostoc, Anabaena, Synechococcus, Oscillatoriaagainst a variety of microbes.Kim 10 showed that 50% of the microalgae genera existed in heterocytous filament form. A total of 100 such samples were taken against 10 different strains of fungi and proved to have fungicidal activity.…”

Section: Resultsmentioning

confidence: 99%

Nutraceuticals From Freshwater Microalgae

Tiwari¹,

Singh²,

Thakur³

2016

IJTA

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Microalgae are excellent reservoirs of adiverse range of nutraceuticals.The presence of secondary metabolites, pigments, vitamins makes microalgae unique reservoir of nutraceuticals. Many strains of microalgae are known to produce intracellular and extracellular metabolites with diverse biological activities such as antibacterial and antifungal;in addition, to it, they are also rich in adiverse range of antioxidants, vitamins and pigments. There is a drastic increase in cases of antibiotic resistance and exploring the antimicrobial efficacy of microalgae can aid in resolving the problem. In this study we have investigated the activity of Microalgae Anabaena variabilis, Synechococcus elongates andSpirulinaplatensisagainst the human pathogenic bacteria namely Enterococcus sp, Esherichiacoli, Pseudomonas sp, Klebsiella sp.Experimental results show that microalgal extracts are capable of inhibiting the growth of pathogenic bacterial strains. Methanol (60%) extract of Anabaena variabilisgave 30mm zone of inhibition against E.coliand methanol extract of Synechococcus elongates gave the highest antimicrobial activity against Enterococcus (32mm inhibition zone) and Pseudomonas sp. (26mm inhibition zone). S.platensis shows highest antimicrobial activity against E.coliwith Methanol (100%). As per the formation of zones, ethanol (100%) extract, butanol, water, acetone and methanol (100%) extract gave a high visibility of zone of inhibition.Exploring the nutraceutical efficacy of microalgae can efficiently address theplethora of drug related issues and, in addition, serve as asource of nutrients.

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Section: Resultsmentioning

confidence: 99%

Nutraceuticals From Freshwater Microalgae

Tiwari¹,

Singh²,

Thakur³

2016

IJTA

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“…and Rhizoctonia solani (Kulik, 1995). In a previous study (Kim, 2006), antifungal activities were found in 29 strains of the 298 microalgal strains tested. Nostoc communm FA-103 was selected as the subject of this study because of its broad spectrum of antifungal activity on plant pathogenic fungi, especially F. oxysporum f. sp.…”

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confidence: 84%

Inhibitory Effect of Algal Extracts on Mycelial Growth of the Tomato-Wilt Pathogen,Fusarium oxysporumf. sp.lycopersici

Kim

2008

Mycobiology

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The present study was undertaken to explore the inhibitory effect of cyanobacterial extracts of Nostoc commune FA-103 against the tomato-wilt pathogen, Fusarium oxysporum f. sp. lycopersici. In an optimal medium, cell growth, antifungal activity, and antifungal compound production could be increased 2.7-fold, 4.1-fold, and 13.4-fold, respectively. A crude algal extract had a similar effect as mancozeb at the recommended dose, both in laboratory and pot tests. In vitro and in vivo fungal growth, spore sporulation and fungal infection of wilt pathogen in tomato seeds were significantly inhibited by cyanobacterial extracts. Nostoc commune FA-103 extracts have potential for the suppression of Fusarium oxysporum f. sp. lycopersici.

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“…Bacteria have been reported to associate with a variety of fungi including mushrooms. Antifungal agents produced by some bacteria have shown to be beneficial to control pathogenic fungi (Kim, 2006; Chang and Kim, 2007). However, they are harmful for the mushroom industry in general.…”

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confidence: 99%

Isolation of Bacteria Associated with the King Oyster Mushroom,Pleurotus eryngii

et al. 2008

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Eight distinct bacteria were isolated form diseased mycelia of the edible mushroom, Pleurotus eryngii. 16S rDNA sequence analysis showed that the isolates belonged to a variety of bacterial genera including Bacillus (LBS5), Enterobacter (LBS1), Sphingomonas (LBS8 and LBS10), Staphylococcus (LBS3, LBS4 and LBS9) and Moraxella (LBS6). Among them, 4 bacterial isolates including LBS1, LBS4, LBS5, and LBS9 evidenced growth inhibitory activity on the mushroom mycelia. The inhibitory activity on the growth of the mushroom fruiting bodies was evaluated by the treatment of the bacterial culture broth or the heat-treated cell-free supernatant of the broth. The treatment of the culture broths or the cell-free supernatants of LBS4 or LBS9 completely inhibited the formation of the fruiting body, thereby suggesting that the inhibitory agent is a heat-stable compound. In the case of LBS5, only the bacterial cell-containing culture broth was capable of inhibiting the formation of the fruiting body, whereas the cell-free supernatant did not, which suggests that an inhibitory agent generated by LBS5 is a protein or a heat-labile chemical compound, potentially a fungal cell wall-degrading enzyme. The culture broth of LBS1 was not inhibitory. However, its cell-free supernatant was capable of inhibiting the formation of fruiting bodies. This indicates that LBS1 may produce an inhibitory heat-stable chemical compound which is readily degraded by its own secreted enzyme.

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

Cited by 52 publications

References 22 publications

Nutraceuticals From Freshwater Microalgae

Nutraceuticals From Freshwater Microalgae

Inhibitory Effect of Algal Extracts on Mycelial Growth of the Tomato-Wilt Pathogen,Fusarium oxysporumf. sp.lycopersici

Isolation of Bacteria Associated with the King Oyster Mushroom,Pleurotus eryngii

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