Molecular insights into Acinetobacter calcoaceticus JK40-mediated zinc availability and transporter gene modulation in rice.

Jana Jayaprakash, Kirankumar P Suthar, Komal G Lakhani, M D Khunt, Vipulkumar B Patel, Nilima Karmakar, Rajkumar B K, Nitin Varshney

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Article in BMC microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Jana JayaprakashDepartment of Plant Molecular Biology and Biotechnology, N. M. College of Agriculture, Navsari Agricultural University, Navsari, Gujarat, 396450, India.

Kirankumar P Suthar *Department of Plant Molecular Biology and Biotechnology, N. M. College of Agriculture, Navsari Agricultural University, Navsari, Gujarat, 396450, India. kiransuthar@nau.in.

Komal G Lakhani *Hawkesbury Institute for the Environment, Western Sydney University, Sydney, NSW, Australia. K.Lakhani@westernsydney.edu.au.

M D KhuntDepartment of Agricultural Microbiology, N.M. College of Agriculture, Navsari Agricultural University, Navsari, Gujarat, 396450, India.

Vipulkumar B PatelDepartment of Basic Sciences, College of Forestry, Navsari Agricultural University, Navsari, Gujarat, 396450, India.

Nilima KarmakarSenior Scientist, ICAR-Indian Institute of Groundnut Research, Junagadh, Gujarat, 362001, India.

Rajkumar B KMain Cotton Research Station, Navsari Agricultural University, Surat, Gujarat, 395007, India.

Nitin VarshneyDepartment of Agricultural Statistics, N.M. College of Agriculture, Navsari Agricultural University, Navsari, Gujarat, 396450, India.

Funding

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6 · The paper itself

Abstract

Zinc (Zn) deficiency is a critical edaphic constraint that limits the productivity of rice (Oryza sativa L.). This study examined the mechanistic effectiveness of Acinetobacter calcoaceticus JK40 (Ac-NAU-JK40), a zinc-solubilizing bacterium (ZSB) isolated from the rice rhizosphere. Notably, JK40 was selected for this study due to its dual ability to solubilize both zinc (Zn) and phosphate (P), a trait believed to prevent P-induced Zn precipitation in the rhizosphere. In hydroponic assays, co-inoculation of Ac-NAU-JK40 with insoluble ZnO significantly improved morphological traits (shoot length + 24.7%; root volume + 207%) and biochemical markers (chlorophyll: 26.2 SPAD units; protein: 49.01 mg g⁻1), including growth regulators such as indole-3-acetic acid (IAA) and gibberellic acid (GA

Indexed as

Acinetobacter calcoaceticusOryzaZincBacterial ProteinsGibberellinsIndoleacetic AcidsOxidative StressPhosphatesPlant Growth RegulatorsPlant RootsRhizosphereZinc OxideBacterial Proteinsgibberellic acidGibberellinsindoleacetic acidIndoleacetic AcidsPhosphatesPlant Growth RegulatorsZincZinc OxideAcinetobacter calcoaceticusOsZIP transportersVegetative Zn nutritionZinc homeostasisZinc-solubilizing bacteria

Identifiers

PMID42919183

DOI10.1016/j.ecoenv.2023.115222

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