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Actinomycete Endophytes from the Ethno Medicinal Plants of Southern India: Antioxidant Activity and Characterization Studies

Actinomycete Endophytes from the Ethno Medicinal Plants of Southern India: Antioxidant Activity... AbstractActinomycete endophytes (135) were isolated from Cajanus lineatus W. & A. (Maesen), Leucas ciliata Benth., Rauwolfia densiflora Benth. Ex. Hook. f. and Gomphostemma heyneanum Wall., four ethnomedicinal species of the southern region of the Western Ghats, a hot spot of biodiversity. The isolates were categorized into three supra generic groups on the basis of spore or aerial mycelial characters and confirmed by the partial 16S rRNA gene sequences. The actinomycete strains were subjected to fermentation and the ethyl acetate extracts were screened for the antioxidant assays. Streptomyces globosus (JQ926176) and Arthrobacter sp. (JQ926171) isolated from the stem fragments of R. densiflora and L. ciliata showed remarkable dose-dependent antioxidant activity in the in vitro assays. Among the screened extracts, S. globosus (IC50 88.2±1.03 μg/ml) and Arthrobacter sp. (IC50 = 97.6±1.97 μg/ml) exhibited high DPPH activity. S. globosus and Arthrobacter extracts contained a total antioxidant activity of 52.44±2.03 μM Fe (II)/g and 40.44±1.97 μM Fe (II)/g respectively. A significant correlation between the total phenolic content and total reducing power of S. globosus (R2=0.983) and Arthrobacter sp. (R2=0.987) extracts were noted. GC-MS characterization of the extracts revealed several compounds with antioxidant activity. S. globosus, S. hypolithicus, P. citrea and P. minatonensis are reported as endophytes for the first time in the ethnomedicinal plants. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Biologically Active Products from Nature Taylor & Francis

Actinomycete Endophytes from the Ethno Medicinal Plants of Southern India: Antioxidant Activity and Characterization Studies

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References (52)

Publisher
Taylor & Francis
Copyright
© 2016 Har Krishan Bhalla & Sons
ISSN
2231-1874
eISSN
2231-1866
DOI
10.1080/22311866.2016.1191971
Publisher site
See Article on Publisher Site

Abstract

AbstractActinomycete endophytes (135) were isolated from Cajanus lineatus W. & A. (Maesen), Leucas ciliata Benth., Rauwolfia densiflora Benth. Ex. Hook. f. and Gomphostemma heyneanum Wall., four ethnomedicinal species of the southern region of the Western Ghats, a hot spot of biodiversity. The isolates were categorized into three supra generic groups on the basis of spore or aerial mycelial characters and confirmed by the partial 16S rRNA gene sequences. The actinomycete strains were subjected to fermentation and the ethyl acetate extracts were screened for the antioxidant assays. Streptomyces globosus (JQ926176) and Arthrobacter sp. (JQ926171) isolated from the stem fragments of R. densiflora and L. ciliata showed remarkable dose-dependent antioxidant activity in the in vitro assays. Among the screened extracts, S. globosus (IC50 88.2±1.03 μg/ml) and Arthrobacter sp. (IC50 = 97.6±1.97 μg/ml) exhibited high DPPH activity. S. globosus and Arthrobacter extracts contained a total antioxidant activity of 52.44±2.03 μM Fe (II)/g and 40.44±1.97 μM Fe (II)/g respectively. A significant correlation between the total phenolic content and total reducing power of S. globosus (R2=0.983) and Arthrobacter sp. (R2=0.987) extracts were noted. GC-MS characterization of the extracts revealed several compounds with antioxidant activity. S. globosus, S. hypolithicus, P. citrea and P. minatonensis are reported as endophytes for the first time in the ethnomedicinal plants.

Journal

Journal of Biologically Active Products from NatureTaylor & Francis

Published: Mar 3, 2016

Keywords: Endophytic actinomycetes; medicinal plants; molecular characterization; antioxidant activities; GC-MS; Western Ghats

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