What benefits of Bacillus macerans have been cited in the scientific literature?
The literature also reports Paenibacillus macerans strains among rhizobacteria that inhibit Ralstonia solanacearum — the bacterial wilt pathogen of Solanaceous crops — through nutrient competition, siderophore production, and cell-wall-degrading enzymes. PGPR disease-control trials against late leaf spot of peanut showed some reduction in single greenhouse experiments, though results were not consistently repeatable across trials.
1AAPFCO-accepted claims
Listing details- Nitrogen fixing; nif gene was identified.
Accepted wording, shown verbatim · source: AAPFCO Plant Biostimulant list
2Potential claims from the literature
Reported to fix atmospheric nitrogen, as evidenced by acetylene-reduction activity and detection/sequencing of the nifH gene in Paenibacillus macerans
Reported to be a diazotroph (nitrogen-fixing bacterium) isolated from the rhizosphere and endorhizosphere of desert plants, referred to under the name Bacillus macerans
Noted as known for nitrogen fixation in the context of plant growth promotion and metal phytoextraction studies
Noted as known for solubilization of phosphorus in the context of plant growth promotion and metal phytoextraction studies
Two strains of Paenibacillus macerans isolated from orchid meristem were reported to promote plant growth (increased total biomass and number of leaves) under greenhouse conditions during seedling acclimatization
A consortium including Paenibacillus macerans NBRFT5 was reported to promote plant growth, attributed to utilization of ACC, synthesis of phytohormones, and solubilization of essential metals
Paenibacillus macerans NBRFT5 in combination with Bacillus pumilus NBRFT9 was reported to enhance accumulation of Pb, Mn, Zn, Cr, and Ni in Brassica juncea grown in fly ash, with plant growth promotion attributed in part to N2 fixation and phosphorus solubilization
A consortium including Paenibacillus macerans NBRFT5 was reported to enhance phytoextraction of metals (Fe, Cd, Pb, Cr, Ni, Cu, Zn) from fly ash by Typha latifolia through increased metal bioavailability
Paenibacillus macerans is listed among antagonistic rhizobacteria reported to compete with and inhibit the growth of Ralstonia solanacearum, the causal agent of bacterial wilt in Solanaceous crops, through mechanisms including competition for nutrients and space, plant-mediated systemic resistance, siderophore production, and production of extracellular cell wall-degrading enzymes
Strains of Paenibacillus macerans were among PGPR evaluated for eliciting systemic disease control; some strains showed significant disease reduction in single greenhouse experiments against late leaf spot of peanut, though results were not consistently repeatable
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