Comparative genome analysis of tea rhizosphere dwelling Paenarthrobacter nicotinovorans AB444: Uncovering Physiological Resilience and Ecological Adaptability
Mukherjee, T.; Mondal, S.; Bhattacharya, D.; Dasgupta, S.; Ghosh, A.
Show abstract
Plant growth-promoting rhizobacteria (PGPR) can be considered a promising tool for sustainable agriculture. The recent scenario of growing demand for higher crop yields, with declining soil fertility and impacts of climate change, promotes the global shift towards eco-friendly agricultural practices, emphasising the significance of PGPR as a sustainable solution. In this study, a PGPR Paenarthrobacter sp. AB444 was isolated from the rhizosphere of tea plants at the Longview and Makaibari tea estates in the Darjeeling District of West Bengal. Based on the draft genome sequence along with comprehensive chemotaxonomic analyses, strain AB444 was identified as Paenarthrobacter nicotinovorans. The pangenomic analysis with phylogenetically close strains revealed the gene clusters that are common and unique to the isolate. The plant growth-promoting attributes of AB444 were explored with different assays like phosphate solubilisation, IAA and siderophore production, ACC deaminase, nitrogen fixation, and protease activity. The colonization of the isolate to the plant root and in-planta growth were also assessed. The presence of biosynthetic gene clusters of AB444 related to plant growth was also extensively studied, highlighting the unmapped disposition of Paenarthrobacter nicotinovorans.
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