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Agricultural Science Digest

Genetic Diversity of Endophytic Bacillus strains (101 and 201) Isolated from Native Neem (Azadirachta indica L.) Plants of West Malaysia

DOI: 10.18805/ag.D-241    | Article Id: D-241 | Page : 313-318
Citation :- Genetic Diversity of Endophytic Bacillus strains (101 and 201) Isolated from Native Neem (Azadirachta indica L.) Plants of West Malaysia.Agricultural Science Digest.2021.(41):313-318
Vithiya Yoganathan, Kartikeya Tiwari tiwarikartik1@gmail.com
Address : Department of Microbiology, International Medical School, Management and Science University, Shah Alam-40100, Selangor, Malaysia.
Submitted Date : 21-02-2020
Accepted Date : 23-11-2020
First Online:

Abstract

Background: A large number of bioactive compounds are produced by neem tree (Azadirachta indica). The association between the neem tree and endophytes is not well explored in West Malaysia. Endophytes are the organisms that live inside the medicinal plants and produce bioactive compounds of medicinal importance. The present research work has been carried out to harness significant biocontrol activity showing endophytic bacterial strains. 
Methods: Screening for bacterial endophytes was performed by using surface sterilisation method. Sterile explants were placed on nutrient agar plates and incubated at 37oC. Plates were observed for the presence of endophytes surrounding the explants. The bacterial endophytes were identified microscopically by Gram staining protocol and molecular characterization was performed by amplification of 16 S rRNA and sequencing. 
Result: Twelve endophytic bacterial strains isolated in which, only two bacterial strains were found significant in terms of bio-control activity. Therefore, these two bacterial strains were selected for further study. The 16S rRNA amplification and phylogenetic tree construction of endophytic bacterial strains (101 and 201) confirmed that these bacterial strains are closest with Bacillus cereus and Bacillus megaterium strains. 

Keywords

16S rRNA gene amplification Bacillus cereus Bacillus megaterium Bacterial endophytes

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