Abstract
ABSTRACTThe use of plant growth-promoting rhizobacteria (PGPR) as agricultural inputs for increasing crop production needs the selection of efficient bacteria with plant growth-promoting (PGP) attributes. Therefore, the purpose of this study was to evaluate the effects of 20 multi-traits bacteria on tea growth, nutrient uptake, chlorophyll contents, and enzyme activities under field conditions for over 3 years. These isolates were screened in vitro for their PGP traits such as the production of indole acetic acid (IAA), nitrogenase activity, phosphorus (P) solubilization, and 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity. Screening of rhizobacteria that show multiple PGP traits suggests that they stimulated overall plant growth, including shoot development and leaf yield, improving macro- and micro-nutrient uptake, chlorophyll contents, and activities of enzymes of tea plant. Use of strains with multiple PGP traits could be a more effective approach and have great potential for the environmentally-friendly tea production.
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