What benefits of Priestia megaterium have been cited in the scientific literature?
On direct plant effects, peer-reviewed research cites significantly enhanced shoot length and fresh weight in rice following inoculation, growth promotion in cruciferous plants, and growth benefits in Cajanus cajan as part of a bacterial consortium. It is also reported to produce indole-3-acetic acid, siderophores, and ACC deaminase — biochemical traits commonly associated with plant growth promotion and stress tolerance.
1Potential claims from the literature
Reported to harbor nifH and nifD nitrogenase genes and to reduce acetylene (a proxy for nitrogen fixation activity) in the presence of heavy metals
Reported to solubilize phosphate, including in the presence of heavy metals
Reported to solubilize potassium from potassium-containing minerals (e.g., potassium feldspar), releasing measurable quantities of potassium in culture
Reported to significantly enhance shoot length and plant fresh weight of rice plants following inoculation
Reported to promote plant growth in cruciferous plants in planta
Reported to enhance production of pharmacologically active compounds (asiaticoside, madecassoside, asiatic acid, madecassic acid) in Centella asiatica when applied as a plant growth-promoting rhizobacterium
Reported to promote growth of Cajanus cajan as part of a triple-culture bacterial consortium, with the consortium outperforming mono and dual cultures in terms of plant growth impact
Reported to produce indole-3-acetic acid (IAA) and siderophores, traits associated with plant growth promotion
Reported to reduce key salt ions (NO₃⁻, Cl⁻, and Na⁺) in secondary saline soil, with the strain employing multi-faceted tolerance strategies including enhanced sporulation, antioxidant defenses, and upregulation of central carbon metabolism under salt stress
Reported to tolerate moderate heavy metal concentrations and to harbor PIB-type ATPase efflux pump genes and Cation Diffusion Facilitator (CDF) genes associated with heavy metal resistance
Reported to induce plant resistance to Xanthomonas campestris pv. campestris (crucifer black rot) via a salicylic acid-dependent signaling pathway, including priming of defense responses such as H₂O₂ accumulation, callose deposition, lignin biosynthesis, and elevated expression of pathogenesis-related genes
Reported to produce ACC deaminase activity, a trait associated with plant stress tolerance and growth promotion
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