{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,26]],"date-time":"2026-10-26T01:13:06Z","timestamp":1792977186125,"version":"4.5.0"},"reference-count":86,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,12,15]],"date-time":"2022-12-15T00:00:00Z","timestamp":1671062400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Microbiol."],"abstract":"<jats:p>Morocco holds the vast majority of the world\u2019s phosphate reserves, but due to the processes involved in extracting and commercializing these reserves, large quantities of de-structured, nutritionally deficient mine phosphate wastes are produced each year. In a semi-arid climate, these wastes severely hamper plant growth and development leading to huge unvegetated areas. Soil indigenous Plant Growth-Promoting Bacteria (PGPB) play a pivotal role in restauration of these phosphate mining wastes by revegetation, by increasing plants development, soil functioning, and nutrient cycling. The development of a vegetative cover above the degraded phosphate wastes, could stabilize and reintegrate these wastes in the surrounding environment. The current study\u2019s objectives were to isolate, characterize, and identify indigenous bacterial strains, and test their PGP activity <jats:italic>in vitro<\/jats:italic> and, for the best-performing strains <jats:italic>in planta<\/jats:italic>, in order to assess their potential for acting as biofertilizers. A quantitative test for the synthesis of auxin and the production of siderophores as well as a qualitative test for the solubilization of phosphate were performed on all isolated bacterial strains. The production of hydrogen cyanide (HCN), exopolysaccharides (EPS), and enzymes were also examined. Three bacteria, selected among the best PGPB of this study, were tested <jats:italic>in planta<\/jats:italic> to determine whether such indigenous bacteria could aid plant growth in this de-structured and nutrient-poor mining soil. Using 16S rRNA gene sequencing, 41 bacterial strains were isolated and 11 genera were identified: <jats:italic>Acinetobacter, Agrococcus, Bacillus, Brevibacterium, Microbacterium, Neobacillus, Paenibacillus, Peribacillus, Pseudarthrobacter, Stenotrophomonas<\/jats:italic>, and <jats:italic>Raoultella<\/jats:italic>. Among the three best performing bacteria (related to <jats:italic>Bacillus paramycoides, Brevibacterium anseongense<\/jats:italic>, and <jats:italic>Stenotrophomonas rhizophila<\/jats:italic>), only <jats:italic>Stenotrophomonas rhizophila<\/jats:italic> and <jats:italic>Brevibacterium anseongense<\/jats:italic> were able to significantly enhance <jats:italic>Lupinus albus<\/jats:italic> L. growth. The best inoculation results were obtained using the strain related to <jats:italic>Stenotrophomonas rhizophila<\/jats:italic>, improving the plant\u2019s root dry weight and chlorophyll content. This is also, to our knowledge, the first study to show a PGP activity of <jats:italic>Brevibacterium anseongense<\/jats:italic>.<\/jats:p>","DOI":"10.3389\/fmicb.2022.1026991","type":"journal-article","created":{"date-parts":[[2022,12,15]],"date-time":"2022-12-15T08:56:20Z","timestamp":1671094580000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":18,"title":["Characterization of plant growth promoting activities of indigenous bacteria of phosphate mine wastes, a first step toward revegetation"],"prefix":"10.3389","volume":"13","author":[{"given":"Najoua","family":"Mghazli","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Odile","family":"Bruneel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rahma","family":"Zouagui","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rachid","family":"Hakkou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laila","family":"Sbabou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2022,12,15]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"84","DOI":"10.12691\/ijebb-2-2-6","article-title":"Assessment of heavy metals bioremediation potential of microbial consortia from poultry litter and spent oil contaminated site.","volume":"2","author":"Adams","year":"2014","journal-title":"Int. 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