Bioeffectors as Biotechnological Tools to Boost Plant Innate Immunity: Signal Transduction Pathways Involved

The use of beneficial rhizobacteria (bioeffectors) and their derived metabolic elicitors are efficient biotechnological alternatives in plant immune system elicitation. This work aimed to check the ability of 25 bacterial strains isolated from the rhizosphere of , and selected for their biochemical...

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Bibliographic Details
Published in:Plants (Basel) 2020-12, Vol.9 (12), p.1731
Main Authors: Martin-Rivilla, Helena, Garcia-Villaraco, Ana, Ramos-Solano, Beatriz, Gutierrez-Mañero, Francisco Javier, Lucas, Jose Antonio
Format: Article
Language:English
Subjects:
Acetic acid
Bacteria
beneficial rhizobacteria
bioeffector
Biotechnology
Butanol
Chitinase
Ethyl acetate
Experiments
Flowers & plants
Gene expression
Genes
Gram-negative bacteria
Gram-positive bacteria
Hexanes
Immune response
Immune system
induced systemic resistance (ISR)
Innate immunity
Jasmonic acid
metabolic elicitors
Metabolism
n-Hexane
Pathogenesis
Pathogens
Phosphates
Phylogenetics
Plant immunity
Plant resistance
Pseudomonas syringae pv. tomato DC3000
Rhizosphere
SA and JA/ET signal transduction pathways
Salicylic acid
Seedlings
Signal transduction
Strains (organisms)
Tomatoes
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Summary:The use of beneficial rhizobacteria (bioeffectors) and their derived metabolic elicitors are efficient biotechnological alternatives in plant immune system elicitation. This work aimed to check the ability of 25 bacterial strains isolated from the rhizosphere of , and selected for their biochemical traits from a group of 175, to trigger the innate immune system of seedlings against the pathogen pv. DC3000. The five strains more effective in preventing pathogen infection were used to elucidate signal transduction pathways involved in the plant immune response by studying the differential expression of Salicylic acid and Jasmonic acid/Ethylene pathway marker genes. Some strains stimulated both pathways, while others stimulated either one or the other. The metabolic elicitors of two strains, chosen for the differential expression results of the genes studied, were extracted using n-hexane, ethyl acetate, and n-butanol, and their capacity to mimic bacterial effect to trigger the plant immune system was studied. N-hexane and ethyl acetate were the most effective fractions against the pathogen in both strains, achieving similar protection rates although gene expression responses were different from that obtained by the bacteria. These results open an amount of biotechnological possibilities to develop biological products for agriculture.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants9121731