Isolation and identification of a new Bacillus glycinifermentans strain from date palm rhizosphere and its effect on barley seeds under heavy metal stress.
B. glycinifermentans
Heavy metals
Hordeum vulgare L.
Plant growth promoting rhizobacteria (PGPR)
Rhizosphere
Journal
Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]
ISSN: 1678-4405
Titre abrégé: Braz J Microbiol
Pays: Brazil
ID NLM: 101095924
Informations de publication
Date de publication:
25 Jan 2024
25 Jan 2024
Historique:
received:
25
08
2023
accepted:
14
01
2024
medline:
25
1
2024
pubmed:
25
1
2024
entrez:
25
1
2024
Statut:
aheadofprint
Résumé
Soil contamination by heavy metals is one of the major problems that adversely decrease plant growth and biomass production. Inoculation with the plant growth-promoting rhizobacteria (PGPR) can attenuate the toxicity of heavy metals and enhancing the plant growth. In this study, we evaluated the potential of a novel extremotolerant strain (IS-2 T) isolated from date palm rhizosphere to improve barley seedling growth under heavy metal stress. The species-level identification was carried out using morphological and biochemical methods combined with whole genome sequencing. The bacterial strain was then used in vitro for inoculating Hordeum vulgare L. exposed to three different Cr, Zn, and Ni concentrations (0.5, 1, and 2 mM) in petri dishes and different morphological parameters were assessed. The strain was identified as Bacillus glycinifermentans species. This strain showed high tolerance to pH (6-11), salt stress (0.2-2 M), and heavy metals. Indeed, the minimum inhibitory concentrations at which bacterium was unable to grow were 4 mM for nickel, 3 mM for zinc, more than 8 mM for copper, and 40 mM for chromium, respectively. It was observed that inoculation of Hordeum vulgare L. under metal stress conditions with Bacillus glycinifermentans IS-2 T stain improved considerably the growth parameters. The capacity of the IS-2 T strain to withstand a range of abiotic stresses and improve barley seedling development under lab conditions makes it a promising candidate for use as a PGPR in zinc, nickel, copper, and chromium bioremediation.
Identifiants
pubmed: 38270795
doi: 10.1007/s42770-024-01263-8
pii: 10.1007/s42770-024-01263-8
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Partnership for Research and Innovation in the Mediterranean Area
ID : BENEFIT-Med
Informations de copyright
© 2024. The Author(s) under exclusive licence to Sociedade Brasileira de Microbiologia.
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