Rhizobacteria modify plant-aphid interactions: a case of induced systemic susceptibility

Plant Biology
A PinedaM Dicke

Abstract

Beneficial microbes, such as plant growth-promoting rhizobacteria and mycorrhizal fungi, may have a plant-mediated effect on insects aboveground. The plant growth-promoting rhizobacterium Pseudomonas fluorescens can induce systemic resistance in Arabidopsis thaliana against several microbial pathogens and chewing insects. However, the plant-mediated effect of these beneficial microbes on phloem-feeding insects is not well understood. Using Arabidopsis as a model, we here report that P. fluorescens has a positive effect on the performance (weight gain and intrinsic rate of increase) of the generalist aphid Myzus persicae, while no effect was recorded on the crucifer specialist aphid Brevicoryne brassicae. Additionally, transcriptional analyses of selected marker genes revealed that in the plant-microbe interaction with M. persicae, rhizobacteria (i) prime the plant for enhanced expression of LOX2, a gene involved in the jasmonic acid (JA)-regulated defence pathway, and (ii) suppress the expression of ABA1, a gene involved in the abscisic acid (ABA) signalling pathway, at several time points. In contrast, almost no effect of the plant-microbe interaction with B. brassicae was found at the transcriptional level. This study present...Continue Reading

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Citations

Apr 3, 2012·Journal of Chemical Ecology·Roxina SolerT Martijn Bezemer
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Apr 4, 2021·International Journal of Molecular Sciences·Yong-Soon Park, Choong-Min Ryu
Apr 25, 2021·Applied and Environmental Microbiology·Tobias B LöserMonika Maurhofer
Jul 5, 2021·Molecular Plant·Laramy Enders, Kevin Begcy
Aug 21, 2021·The New Phytologist· InderjitT Martijn Bezemer

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