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Seaweed Extracts Control the Leaf Spot Disease of the Medicinal Plant Gymnema Sylvestre


Affiliations
1 Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai - 600 025, India
 

Antimicrobial screening of 12 different seaweeds extracts namely Chaetomorpha antennina, Dictyota dichotoma, Enteromorpha flexuosa, Laurencia obtusa, Gracilaria corticata, Gracilaria verrucosa, Grateloupia lithophila, Padina boergesenii, Sargassum wightii, Turbinaria conoides, Halimeda tuna and Ulva lactuca was carried out in vitro. The crude extracts were tested against the phytopathogenic bacterium- Pseudomonas syringae causing leaf spot disease of the medicinal plant Gymnema sylvestre. The methanolic extracts of Sargassum wightii showed maximum activity followed by ethyl acetate compared to that of other organic solvent- extracts. Thus, this investigation throws fresh light on the appropriate usage of solvent extraction method in preparing potent biopesticide.

Keywords

Gymnema Sylvestre, Seaweed Extracts, Plant Pathogenic Bacteria, Leaf Spot Disease, Pathogenicity, Pseudomonas Syringae
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  • Seaweed Extracts Control the Leaf Spot Disease of the Medicinal Plant Gymnema Sylvestre

Abstract Views: 753  |  PDF Views: 150

Authors

Chinnadurai Sreenath Kumar
Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai - 600 025, India
Dronamraju V. L. Sarada
Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai - 600 025, India
Ramasamy Rengasamy
Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai - 600 025, India

Abstract


Antimicrobial screening of 12 different seaweeds extracts namely Chaetomorpha antennina, Dictyota dichotoma, Enteromorpha flexuosa, Laurencia obtusa, Gracilaria corticata, Gracilaria verrucosa, Grateloupia lithophila, Padina boergesenii, Sargassum wightii, Turbinaria conoides, Halimeda tuna and Ulva lactuca was carried out in vitro. The crude extracts were tested against the phytopathogenic bacterium- Pseudomonas syringae causing leaf spot disease of the medicinal plant Gymnema sylvestre. The methanolic extracts of Sargassum wightii showed maximum activity followed by ethyl acetate compared to that of other organic solvent- extracts. Thus, this investigation throws fresh light on the appropriate usage of solvent extraction method in preparing potent biopesticide.

Keywords


Gymnema Sylvestre, Seaweed Extracts, Plant Pathogenic Bacteria, Leaf Spot Disease, Pathogenicity, Pseudomonas Syringae

References





DOI: https://doi.org/10.17485/ijst%2F2008%2Fv1i3%2F29225