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Antimicrobial Activity of Bacterial Endophytes from Medicinal Endemic Plant Garcinia lancifolia Roxb.

Prabhali Doley*, Dhruva Kumar Jha

Abstract


Endophytes are important source of bioactive metabolites having antibacterial, antifungal and antiviral activities. Garcinia lancifolia Roxb. is an endemic medicinal plant of Assam and is known for its antiscorbutic, astringent, cardiotonic, and emollient properties. The aim of this study was to isolate and identify the endophytic bacteria associated with G. lancifolia for potential antimicrobial activity. The five bacterial endophytes isolated from different parts of G. lancifolia were tentatively identified as Bacillus cereus (GlB1), B. megaterium (GlB2), Staphylococcus sp (GlB3), Corynebacterium xerosis (GlB4) and C. kutscheri (GlB5) on the basis of their colony morphology and biochemical characteristics. The isolates were tested for antibiotic sensitivity, antibacterial and antifungal activities and plant growth promoting traits. All of them showed antibacterial and antifungal activities. Highest zone of inhibition (20 mm) was exhibited by GlB1 against K. pneumoniae followed by GlB3 and GlB5 against B. subtilis and E. coli respectively. All the isolates showed positive result in production of I. A. A, NH3 and solubilised phosphate.

Keywords


Bacterial endophytes; Garcinia lancifolia; Antimicrobial activity; Antifungal activity.

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References


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