Characterization of plant growth-promoting bacteria from Vicia faba root nodules grown on oasis soils and their potential to enhance soil fertility and crop growth attributes in arid regions

14 Jul 20266 min read0 viewsJournal Feed

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by Oumaima Chaieb, Souhir Abdelkrim, Iris Bertani, Wael Taamalli, Khediri Mannai, Fatma Souissi, Moez Jebara, Vittorio Venturi, Salwa Harzalli Jebara Soil degradation and nutrient depletion are major constraints in arid regions, particularly in fragile oasis ecosystems. Harnessing beneficial plant-bacteria interactions offers a sustainable approach to improving soil fertility and crop productivity. This study aimed to isolate and characterize plant growth-promoting rhizobacteria (PGPR) from root nodules of V. faba L.
var. minor Saber 02 grown on 12 oasis soils, and to evaluate their potential for enhancing plant growth and soil fertility. Sixty bacteria were isolated from V. faba root-nodules.
16S rDNA sequencing revealed seven bacterial orders: Enterobacteriales, Pseudomonodales , Burkholderiales , Xanthomonadales , Rhodospirillales , Hyphomicrobiales , Bacillales . Plant growth promoting (PGP) traits screening identified five of the sixty isolates including Rhizobium laguerreae (Vf19), Bacillus halotolerans (Vf43), Gluconobacter frateurii (Vf47), Pseudomonas reinekei (Vf48), and Kosakonia radicincitans (Vf49) which harbor multiple PGP traits with interesting biocontrol potential as well as high tolerance to osmotic stresses. Eleven inoculums formed by mixing efficient and resistant PGPR to inoculate V. faba L.
minor var.

Clinical Editorial

PLOS ONE (Medicine) published a clinical update in Research Highlights on 14 Jul 2026.

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