Banrihun Wahlang, Supriyo Sen and Jayanti Datta Roy*

Department of Biosciences, Assam Don Bosco University, Tapesia Gardens, Kamarkuchi, Sonapur, Tapesia-782402 (India) *Corresponding author: Assistant Professor, Department of Biosciences, Assam Don Bosco University, Tapesia Gardens, Kamarkuchi, Sonapur, Tapesia, Assam 782402 (India) jayanti.roy@dbuniversity.ac.in

ABSTRACT

The present study was focused on screening of bacterial endophytes from Camelia sinensis for plant growth promoting activity along with phenotypic, biochemical characterization and identification. Plant tissue samples (leaves, stems and roots) were collected from the Tapesia tea garden which was thereafter surface sterilized followed by serial dilution for isolating the endophytic bacteria. The bacterial isolates were characterized biochemically and identified by VITEK –MS system. and thereafter screened for different plant growth promoting parameters viz. ammonia production, indole acetic acid production, siderophore production, L-asparaginase production. A total of twelve bacterial isolates were identified and their growth promoting features were studied. Bacillus cereus isolates ADBU 1 and ADBU 3 showed asparagine and ammonia production, while ADBU 2, ADBU 12 were found to be siderophore and ammonia producing. Similarly, ADBU 4 and ADBU 5 were only ammonia producers whereas ADBU 7 and ADBU 9 were siderophore, ammonia and asparaginase producing isolates. ADBU 6 was identified as Lysinibacillus fusiformis exhibited IAA and ammonia production property. ADBU 8 was Acinetobacter johnsonii which was found to be siderophore and ammonia producer. Hence, based on the present findings it may be concluded that the bacterial isolates associated with the tea plantation possess multifarous growth promoting properties which may be developed as bioformulation and/or biofertilizers.

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