What does the published scientific research say about Paenibacillus durus?

Paenibacillus durus (formerly Clostridium durum; type strains ATCC 35681 and DSM 1735) is a soil bacterium in the genus Paenibacillus. Five PubMed articles reference it in a plant-input context, primarily as a reference taxon in phylogenetic studies of related nitrogen-fixing species.

The literature also shows that nitrogen fertilization level influenced the structure of the broader nifH-bearing Paenibacillus community in those rhizospheres, though the specific ecological role of P. durus in nitrogen supply to plants was not quantified in the indexed studies.

Research on Paenibacillus durus biosafety classification, EPA registration precedent, or AAPFCO biostimulant claim status is not present in these five records. The indexed data establishes rhizosphere detection and nifH carriage only — no efficacy or regulatory endorsement is implied.