ArticleBMC microbiology2026
Acinetobacter lwoffii 5M1 mediated biological oxidation enhances elemental sulphur efficiency for sodic soil amelioration and its crop productivity.
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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Abstract
backgroundNative sulphur-oxidising microbial communities play a crucial role in the effectiveness of elemental sulphur (S°)-based reclamation of sodic soils. This study reports, for the first time, the sulphur oxidation (S°-oxidation) capability of Acinetobacter lwoffii strain 5M1, isolated from highly saline soil (electrical conductivity of 36 dS m⁻¹) surrounding a hot-water spring.
resultThe strain released appreciable amounts of plant growth-promoting compounds, including ammonia and indole-3-acetic acid (IAA). A. lwoffii 5M1 formed biofilms around S°-particles in growth media. It harbours the soxA (720 bp), soxB (590 bp), and soxY (329 bp) genes, which form the core component of the Sox gene cluster. Inoculation of S° with A. lwoffii 5M1 caused a 15.3-39.1% increase in S°-oxidation in soil of varied sodicity with pHs ranging from 9.1 to 10.5. The improved oxidation was associated with a decline in bicarbonate and alkalinity and a simultaneous increase in Ca²⁺, Mg²⁺, and inorganic P content in the soil solution. Integrating strain 5M1 with S°enhanced rice and wheat yields by 6.45-28.8% than S° alone.
conclusionThis study concludes that A. lwoffii strain 5M1, with its dual function of S° oxidation and plant growth promotion, represents a promising bio-inoculant for rapid and efficient sodicity reclamation.
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