Comparison of Two Bacillus Strains Isolated from the Coastal Zone in Barley (Hordeum vulgare L.) Under Salt Stress

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dc.authoridACAR, OKAN/0000-0002-9818-8827
dc.contributor.authorYildiz, Muge Teker
dc.contributor.authorAcar, Okan
dc.date.accessioned2025-05-29T02:57:21Z
dc.date.available2025-05-29T02:57:21Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractSalt stress is one of the most important abiotic stress factors that negatively affects sustainable crop production, agricultural productivity, and microbial life. Increasing salt stress negatively affects the growth and development of barley, posing a threat to global food security. It is now known that inoculation of plant growth-promoting rhizobacteria (PGPR) has significant potential in increasing stress tolerance and yield in agricultural products. This study focused on the effects of Bacillus cereus CUN6 and Bacillus thuringiensis SIRB2, isolated from the coastal zone and tested for their PGPR capacities, on physiological (root length, shoot length, biomass, dry weight) and biochemical (total chlorophyll, total protein, hydrogen peroxide, lipid peroxidation, peroxidase activity (POX), catalase activity (CAT)) analyses in Hordeum vulgare L. seedlings under salt stress. The results showed that the two bacterial inoculations alleviated the negative effects of salt stress by increasing the root-shoot length, biomass, dry weight, chlorophyll content, and total protein content in barley plants. However, B. thuringiensis increased growth and development especially in root length, biomass, and dry weight compared to B. cereus. On the other hand, B. cereus significantly increased root length, biomass, and chlorophyll content under salt stress; these increases were 17%, 5%, and 7%, respectively. B. thuringiensis chlorophyll content increased by 4% in 300 mM NaCl compared to the control. When compared in terms of the antioxidant defense system, B. thuringiensis inoculation was more effective on CAT activity, while B. cereus inoculation was more effective on POX activity. Under salt stress, B. cereus and B. thuringiensis inoculation significantly decreased H2O2 content in barley; these decreases were 16% and 10%, respectively. Additionally, TBARs content was significantly decreased by B. cereus and B. thuringiensis inoculation under salt stress; these decreases were determined as 8% and 9%, respectively, compared to the control. These results indicated that both bacterial inoculations can alleviate the salt tolerance of barley seedlings by regulating antioxidant metabolism. This research focused on the potential of B. cereus and B. thuringiensis as biofertilizers against salt stress in barley based on physiological and biochemical analysis.
dc.description.sponsorshipCanakkale Onsekiz Mart University project [FDK-2021-3684]; Scientific and Technological Research Councilof Turkiye (TUEBITAK) [2211-A]
dc.description.sponsorshipWe would like to thank the Canakkale Onsekiz Mart University project (FDK-2021-3684) for their support. We would like to thank the Scientific and Technological Research Councilof Turkiye (TUEBITAK 2211-A National Doctoral Scholarship Program) and the Council of Higher Education (YOEK100/2000 Priority Fields Doctoral Scholarship Program) for their support.
dc.identifier.doi10.3390/plants14050723
dc.identifier.issn2223-7747
dc.identifier.issue5
dc.identifier.pmid40094622
dc.identifier.scopus2-s2.0-86000531272
dc.identifier.scopusqualityN/A
dc.identifier.urihttps://doi.org/10.3390/plants14050723
dc.identifier.urihttps://hdl.handle.net/20.500.12428/30028
dc.identifier.volume14
dc.identifier.wosWOS:001442306800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherMDPI
dc.relation.ispartofPlants-Basel
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250529
dc.subjectbarley
dc.subjectsalt stress
dc.subjectplant growth-promoting rhizobacteria
dc.subjectantioxidant defense system
dc.titleComparison of Two Bacillus Strains Isolated from the Coastal Zone in Barley (Hordeum vulgare L.) Under Salt Stress
dc.typeArticle

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