Biosynthesis of
Zinc Oxide Nanoparticles using Plant Growth promoting Rhizobacteria of Curcuma longa
and Zingiber officinale
Mulani Arif A., Bhavikatti Bharati K., Chavan Ranjana S. and Mali Gajanan V.
Res. J. Chem. Environ.; Vol. 29(11); 18-27;
doi: https://doi.org/10.25303/2911rjce018027; (2025)
Abstract
The biosynthesis of zinc oxide nanoparticles (ZnO NPs) using plant growth-promoting
rhizobacteria (PGPR) offers an environmentally acceptable and sustainable alternative
to traditional chemical and physical synthesis methods. This work explores the production
of ZnO NPs using PGPR isolated from the rhizosphere soil of two medicinal plants
Curcuma longa (turmeric) and Zingiber officinale (ginger). The isolated PGPR were
characterised by their plant growth-promoting features, including phosphate solubilization,
cellulose degradation, zinc solubilization, indole acetic acid (IAA) synthesis and
siderophore secretion.
Additionally, the screened isolates were tested at various salt concentrations,
ranging from 0.5% to 7.5%, to assess their salt stress tolerance. The biosynthesis
of ZnO nanoparticles using bacterial isolates was validated by visual monitoring
of turbidity changes in reaction mixes containing zinc salts. The formation of turbidity
suggested nanoparticle production. The present study demonstrates the successful
production of zinc oxide nanoparticles (ZnO NPs) using plant growth-promoting rhizobacteria
(PGPR) from Curcuma longa and Zingiber officinale.
