Assessment of plant growth-promoting activities of Cr(VI) tolerant endophytes isolated from Phyllanthus amarus Schum & Thonn for their bioremediation potential
Randomized trial evaluates Cr(VI) remediation and plant growth promotion in spinach and amaranth using endophyte A. pusense PaR9, suggesting effective bioremediation.
Key Points
This research aims to identify and evaluate Cr(VI)-tolerant endophytes from *Phyllanthus amarus* for their bioremediation and plant growth-promoting activities.
Isolated Cr(VI)-tolerant PGPEB from *Phyllanthus amarus* at a waste disposal site in India.
Evaluated plant growth-promoting traits and Cr(VI) remediation capabilities under in vitro conditions.
Conducted biomass accumulation and growth assessments in spinach and amaranth in soil containing 100 mg kg−1 Cr(VI).
Strain PaR9 (identified as *Agrobacterium pusense*) produced 8.514 µg mL−1 indole-3-acetic acid and removed 67.21% of Cr(VI) in 72 h.
Inoculation with PaR9 significantly improved biomass accumulation, root/shoot growth, and photosynthetic pigments in plants.
Isolates tolerated Cr(VI) concentrations ranging from 100 to 700 mg L−1.