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@plantcellphysiol.bsky.social Sep 30, 2026, 9:07 AM

How do plant-soil feedbacks & defense pathways differ if they are induced by exogenous #phytohormones or #herbivory?

These are some of the questions posed by PCP budding Editor, Merissa Huei-Hsuan Tsai @hueihsuantsai.bsky.social

🆓 doi.org/10.1093/pcp/...

#PlantScience
#PlantImmunity

Schematic overview showing defense-induced rhizosphere shifts and density-gated plant-soil feedback systems in B. oleracea.The diagram is split into the initial 'Conditioning phase' (left) where both the JA and SA pathways are induced by either phytohormone application (MeJA, SA) or herbivory (M. brassicae caterpillars; M. persicae aphids). The JA-pathway induction depleted Proteobacteria, mainly the genus Massilia, in the rhizosphere, while both pathways enriched a shared set of general stress-responsive microbes, including Planctomycetota (bacteria) and Mortierellomycota (fungi). The 'Feedback phase' is shown in the right panel: second-generation plants grown in conditioned soils were challenged with caterpillars or aphids; for clarity, only the SA-conditioned soil under aphid challenge is illustrated, as this was the only combination for which a soil-legacy effect on herbivore performance was detected. The soil legacy effect was not detectable under high aphid density, but became apparent under low aphid density. The diagram concludes that SA-conditioned soil from the conditioning phase is passed into the feedback phase. Figure taken from Huei-Hsuan Merissa Tsai, Not whether, but when: contextual rules for defense-induced plant–soil feedbacks, Plant and Cell Physiology, Volume 67, Issue 9, September 2026, Pages 1458–1460, https://doi.org/10.1093/pcp/pcag116

@miguelmatilla.bsky.social Sep 14, 2026, 11:58 AM

How do bacterial #sensor #domains #evolve? Our new study in reveals how sensor domains evolve in #bacteria to sense #phytohormones. 🧬🌱🦠 @eezcsic.bsky.social @canalugr.bsky.social @csicdivulga.bsky.social @blastmeetings.bsky.social @jouline.bsky.social

See: pubmed.ncbi.nlm.nih.gov/42617770/

@plantcellphysiol.bsky.social Sep 8, 2026, 11:37 AM

How is leaf size regulated?🥬

Monden et al. reveal a novel mechanism by which an AHK3–CKX4 module governs root to shoot #xylem transport of trans-zeatin-type cytokinins, thereby fine-tuning leaf size according to root nitrate status

doi.org/10.1093/pcp/...

#PlantScience
#Phytohormones
#RootBiology