Fiziol. rast. genet. 2021, vol. 53, no. 5, 371-386, doi:

Bacterial signaling molecules of acyl-homoserine lactone type: effect on plant growth and stress resistance

Babenko L.M., Kosakivska I.V., Voytenko L.V., Romanenko K.O.

  • M.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine 2 Tereshchenkivska St., Kyiv, 01601, Ukraine

The latest literature data on bacterial signaling molecules acyl-homoserine lactones (AHLs) role in regulation of plant growth and development, and enhancing of stress resistance to biotic and abiotic stressors are reviewed. AHLs synchronize individual cellular genomes, provide remote signaling between bacteria-colonizers of the phytosphere, which allows the population to respond to external signaling and establish a symbiotic or antagonistic relationship with the host plant. AHLs regulation of rhizosphere functions, the most dynamic site of plant and associated microflora interaction, is especially important in the development of new biotechnological approaches aimed at increasing yields and stress resistance of crops. Recent studies have shown direct (plant-specific) and indirect (rhizosphere microflora-specific) effects of AHLs. It has been proved that AHL-priming induces an intensification of plant growth, an increase in the content of photosynthetic pigments, changes in the balance of endogenous phytohormones, affects the protective mechanisms formation, changes the architecture of roots, influences stomatal conductance, and callose deposition. Since AHLs comply intensive organic farming, they are regarded as promising biostimulants and phytomodulators that can improve the quantity and quality of crop plants production.

Keywords: acyl homoserine lactones, quorum sensing, AHL-signaling, priming, resistance, biotechnology

Fiziol. rast. genet.
2021, vol. 53, no. 5, 371-386

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