Soil bacteria elevate essential oil accumulation and emissions in sweet basil

Journal of Agricultural and Food Chemistry
Erika BanchioPaul W Paré

Abstract

Plant growth-promoting rhizobacteria ameliorate environmental conditions for plants by facilitating nutrient uptake and mitigating disease susceptibility. While volatile chemicals from certain soil microbes are sufficient to elicit growth and defense responses in Arabidopsis, whether such volatile signals can induce essential oil accumulation and chemical emissions has yet to be reported. Here, we provide biochemical evidence that the plant growth-promoting soil bacterium Bacillus subtilis GB03 releases volatile chemicals that elevate fresh weight essential oil accumulation and emissions along with plant size in the terpene-rich herb sweet basil (Ocimum basilicum). The two major essential oil components from sweet basil, alpha-terpineol and eugenol, increased ca. 2- and 10-fold, respectively, in plants exposed to GB03 volatiles or with root inoculation as compared to water controls. On a fresh and dry weight basis, shoot and root biomass increases of ca. 2-fold were observed with GB03 volatile exposure or GB03 media inoculation as compared with controls. In testing the efficacy of GB03 volatiles to trigger plant growth and secondary compound production, a physical partition separating roots from bacterial media was provided to ...Continue Reading

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Citations

Jul 25, 2013·Journal of Chemical Ecology·Robert R Junker, Dorothea Tholl
Oct 13, 2009·Plant Signaling & Behavior·Randy Ortíz-CastroJosé López-Bucio
Apr 10, 2019·Biochemistry and Molecular Biology Education : a Bimonthly Publication of the International Union of Biochemistry and Molecular Biology·Lorena Del Rosario CappellariErika Banchio
Apr 12, 2019·Pest Management Science·Elisa Korenblum, Asaph Aharoni
Jun 24, 2017·Plant, Cell & Environment·Birgit PiechullaMarco Kai
Jan 12, 2021·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Sivasankari Ramadurai, Usha Balasundaram
Dec 17, 2009·Journal of Agricultural and Food Chemistry·Erika BanchioWalter Giordano
Jun 21, 2021·Trends in Plant Science·Antonio CelliniJoseph W Kloepper

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