Rhizosphere: Role of bacteria to manage plant diseases and sustainable agriculture—A review

Benaissa, Asmaa

doi:10.1002/jobm.202300361

Cited by 7 publications

(3 citation statements)

References 110 publications

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“…The increase in the world population, global warming and the reduction in the efficiency of chemical fertilizers and pesticides necessitate the building of sustainable food systems 1 .…”

Section: Introductionmentioning

confidence: 99%

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Salmonella exploits the reactive oxygen species generated by the plant immune system to enhance colonization

Aldin,

Tzipilevich

2024

Preprint

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Understanding bacterial interaction with the plant immune system is essential for building a sustainable food system. Discouraging pathogens enhancing beneficial bacteria and preventing food spoilage and contamination by human enteric pathogens. Immune system activation triggers a burst of reactive oxygen species (ROS). We discovered that the food-poisoning bacterium Salmonella exploits the plant ROS to enhance biofilm formation and colonization. Scavenging the ROS with antioxidants reduces colonization. Further, combining the antioxidant vitamin C and immune system activation with salicylic acid inhibits Salmonella colonization synergistically of the plant model Arabidopsis and edible plants. This safe-to-use combination is an eco-friendly method to prevent plant contamination by Salmonella, Listeria and enteropathogenic E. coli. The exploitation of plant immunity for enhancing colonization is not exclusive to Salmonella. It is exhibited by pseudomonas species isolated from plants, suggesting it is a general plant colonization strategy.

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“…The increase in the world population, global warming and the reduction in the efficiency of chemical fertilizers and pesticides necessitate the building of sustainable food systems 1 .…”

Section: Introductionmentioning

confidence: 99%

“…The increase in the world population, global warming and the reduction in the efficiency of chemical fertilizers and pesticides necessitate the building of sustainable food systems 1 . Understanding plant microbe interaction at the molecular level is an avenue to reach this goal.…”

Section: Introductionmentioning

confidence: 99%

Salmonella exploits the reactive oxygen species generated by the plant immune system to enhance colonization

Aldin,

Tzipilevich

2024

Preprint

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“…It also hosts significant physiological, chemical, and biological activities. Many bacteria penetrate the rhizosphere and can boost plant growth and health [ 17 ]. Species of Bacillus are Gram-positive sporeformers, and many of these species are known for their adaptable metabolic capacities and profound effects on soil ecosystems and plant health [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Whole-Genome Sequencing of Two Potentially Allelopathic Strains of Bacillus from the Roots of C. equisetifolia and Identification of Genes Related to Synthesis of Secondary Metabolites

Wang,

Chen,

Lin

et al. 2024

Microorganisms

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The coastal Casuarina equisetifolia is the most common tree species in Hainan’s coastal protection forests. Sequencing the genomes of its allelopathic endophytes can allow the protective effects of these bacteria to be effectively implemented in protected forests. The goal of this study was to sequence the whole genomes of the endophytes Bacillus amyloliquefaciens and Bacillus aryabhattai isolated from C. equisetifolia root tissues. The results showed that the genome sizes of B. amyloliquefaciens and B. aryabhattai were 3.854 Mb and 5.508 Mb, respectively. The two strains shared 2514 common gene families while having 1055 and 2406 distinct gene families, respectively. The two strains had 283 and 298 allelochemical synthesis-associated genes, respectively, 255 of which were shared by both strains and 28 and 43 of which were unique to each strain, respectively. The genes were putatively involved in 11 functional pathways, including secondary metabolite biosynthesis, terpene carbon skeleton biosynthesis, biosynthesis of ubiquinone and other terpene quinones, tropane/piperidine and piperidine alkaloids biosynthesis, and phenylpropanoid biosynthesis. NQO1 and entC are known to be involved in the biosynthesis of ubiquinone and other terpenoid quinones, and rfbC/rmlC, rfbA/rmlA/rffH, and rfbB/rmlB/rffG are involved in the biosynthesis of polyketide glycan units. Among the B. aryabhattai-specific allelochemical synthesis-related genes, STE24 is involved in terpene carbon skeleton production, atzF and gdhA in arginine biosynthesis, and TYR in isoquinoline alkaloid biosynthesis. B. amyloliquefaciens and B. aryabhattai share the genes aspB, yhdR, trpA, trpB, and GGPS, which are known to be involved in the synthesis of carotenoids, indole, momilactones, and other allelochemicals. Additionally, these bacteria are involved in allelochemical synthesis via routes such as polyketide sugar unit biosynthesis and isoquinoline alkaloid biosynthesis. This study sheds light on the genetic basis of allelopathy in Bacillus strains associated with C. equisetifolia, highlighting the possible use of these bacteria in sustainable agricultural strategies for weed management and crop protection.

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Biological Control of Microbial Pectinolytic Plant Pathogens Causing Soft Rot of Fruits and Vegetables

Asmaa,

Merdia,

Kheira

et al. 2024

Journal of Basic Microbiology

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It is crucial to implement appropriate measures to prevent the spread of plant pathogens that lead to the decay of fruits and vegetables. From this perspective, we evaluated the biocontrol potential of five Bacillus‐plant growth promoting rhizobacteria (PGPR) strains against twenty‐one pectinolytic phytopathogens causing soft rot in fruits and vegetables. These phytopathogens had been previously studied. Three in vitro methods were utilized to accomplish this objective: competition, extraction of bioactive substances, and direct confrontation. The inhibitory effect of the direct confrontation method resulted in a slower growth of 11 microbial plant pathogens. In addition, it was noted that 11 strains of plant pathogens generated inhibitory constituents, while 15 plant pathogens produced inducible inhibitory substances. Furthermore, volatile inhibitory compounds were detected in the six tested strains. Overall, strains of PGPR‐Bacillus demonstrated strong antifungal and antibacterial properties against phytopathogens. These PGPR can be regarded as potential biocontrol agents for soft microbial rot in fruits and vegetables as well as producers of substances that effectively suppress plant diseases.

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Rhizosphere: Role of bacteria to manage plant diseases and sustainable agriculture—A review

Cited by 7 publications

References 110 publications

Salmonella exploits the reactive oxygen species generated by the plant immune system to enhance colonization

Salmonella exploits the reactive oxygen species generated by the plant immune system to enhance colonization

Whole-Genome Sequencing of Two Potentially Allelopathic Strains of Bacillus from the Roots of C. equisetifolia and Identification of Genes Related to Synthesis of Secondary Metabolites

Biological Control of Microbial Pectinolytic Plant Pathogens Causing Soft Rot of Fruits and Vegetables

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