Exploiting the role of plant growth promoting rhizobacteria in reducing heavy metal toxicity of pepper (Capsicum annuum L.)

El-Saadony, Mohamed T.; Desoky, El-Sayed M.; El-Tarabily, Khaled A.; AbuQamar, Synan F.; Saad, Ahmed M.

doi:10.1007/s11356-024-32874-1

Cited by 6 publications

(2 citation statements)

References 127 publications

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“…It could also bind to proteins containing SH in chloroplasts, inhibit the synthesis of chlorophyll precursors, destroy chloroplast structure, and ultimately reduce chlorophyll content [ 30 , 31 ]. El-Saadony et al [ 32 ] found that inoculation with PGPR increased the chlorophyll content of pepper ( Capsicum annuum L.) in Cd-contaminated soil. In this work, the inoculation of Cd-tolerant bacteria increased the chlorophyll content of ryegrass leaves, which could be attributed to the fact that Cd-tolerant bacteria enhanced the absorption of K and Fe in ryegrass and promoted the synthesis of chlorophyll.…”

Section: Discussionmentioning

confidence: 99%

Investigating the Mechanism of Cadmium-Tolerant Bacterium Cellulosimicrobium and Ryegrass Combined Remediation of Cadmium-Contaminated Soil

Li,

Xu,

Song

et al. 2024

Plants

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Cadmium (Cd) pollution has been rapidly increasing due to the global rise in industries. Cd not only harms the ecological environment but also endangers human health through the food chain and drinking water. Therefore, the remediation of Cd-polluted soil is an imminent issue. In this work, ryegrass and a strain of Cd-tolerant bacterium were used to investigate the impact of inoculated bacteria on the physiology and biochemistry of ryegrass and the Cd enrichment of ryegrass in soil contaminated with different concentrations of Cd (4 and 20 mg/kg). The results showed that chlorophyll content increased by 24.7% and 41.0%, while peroxidase activity decreased by 56.7% and 3.9%. In addition, ascorbic acid content increased by 16.7% and 6.3%, whereas glutathione content decreased by 54.2% and 6.9%. The total Cd concentration in ryegrass increased by 21.5% and 10.3%, and the soil’s residual Cd decreased by 86.0% and 44.1%. Thus, the inoculation of Cd-tolerant bacteria can improve the antioxidant stress ability of ryegrass in Cd-contaminated soil and change the soil’s Cd form. As a result, the Cd enrichment in under-ground and above-ground parts of ryegrass, as well as the biomass of ryegrass, is increased, and the ability of ryegrass to remediate Cd-contaminated soil is significantly improved.

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Section: Discussionmentioning

confidence: 99%

Investigating the Mechanism of Cadmium-Tolerant Bacterium Cellulosimicrobium and Ryegrass Combined Remediation of Cadmium-Contaminated Soil

Li,

Xu,

Song

et al. 2024

Plants

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“…is a widely used inter-root growth promoter. Certain Bacillus species also exhibit high levels of tolerance to metal cadmium ions [ 6 , 12 ]. It has been reported that, under cadmium stress, Bacillus is able to promote the production of osmoregulatory substances, including proline, amino acids, and betaine, in plants, thereby maintaining osmotic pressure balance.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Two Siderophore-Producing Bacillus Strains on the Growth Promotion of Perennial Ryegrass under Cadmium Stress

Wu,

Xie,

et al. 2024

Microorganisms

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Cadmium (Cd) is a highly toxic and cumulative environmental pollutant. Siderophores are heavy metal chelators with high affinity to heavy metals, such as Cd. Ryegrass (Lolium perenne L.) has a potential remediation capacity for soils contaminated by heavy metals. Consequently, using ryegrass alongside beneficial soil microorganisms that produce siderophores may be an effective means to remediate soils contaminated with Cd. In this study, the Bacillus strains WL1210 and CD303, which were previously isolated from the rhizospheres of Nitraria tangutorum in Wulan and Peganum harmala L. in Dachaidan, Qinghai, China, respectively, both arid and sandy environments, were evaluated for heavy metal pollution mitigation. Our quantitative analyses have discerned that the two bacterial strains possess commendable attributes of phosphorus (P) solubilization and potassium (K) dissolution, coupled with the capacity to produce phytohormones. To assess the heavy metal stress resilience of these strains, they were subjected to a cadmium concentration gradient, revealing their incremental growth despite cadmium presence, indicative of a pronounced tolerance threshold. The subsequent phylogenetic analysis, bolstered by robust genomic data from conserved housekeeping genes, including 16S rDNA, gyr B gene sequencing, as well as dnaK and recA, delineated a species-level phylogenetic tree, thereby confirming the strains as Bacillus atrophaeus. Additionally, we identified the types of iron-carrier-producing strains as catechol (WL1210) and carboxylic acid ferrophilin (CD303). A genomic analysis uncovered functional genes in strain CD303 associated with plant growth and iron carrier biosynthesis, such as fnr and iscA. Ryegrass seed germination assays, alongside morphological and physiological evaluations under diverse heavy metal stress, underscored the strains’ potential to enhance ryegrass growth under high cadmium stress when treated with bacterial suspensions. This insight probes the strains’ utility in leveraging alpine microbial resources and promoting ryegrass proliferation.

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Endophytic chitinase and antifungal metabolites-producing actinobacteria for biological control of cucumber damping off disease

El-Akshar,

El-Meihy,

Tewfike

et al. 2024

J Plant Pathol

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Exploiting the role of plant growth promoting rhizobacteria in reducing heavy metal toxicity of pepper (Capsicum annuum L.)

Cited by 6 publications

References 127 publications

Investigating the Mechanism of Cadmium-Tolerant Bacterium Cellulosimicrobium and Ryegrass Combined Remediation of Cadmium-Contaminated Soil

Investigating the Mechanism of Cadmium-Tolerant Bacterium Cellulosimicrobium and Ryegrass Combined Remediation of Cadmium-Contaminated Soil

The Effect of Two Siderophore-Producing Bacillus Strains on the Growth Promotion of Perennial Ryegrass under Cadmium Stress

Endophytic chitinase and antifungal metabolites-producing actinobacteria for biological control of cucumber damping off disease

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