Recent Posts

Arabidopsis seeds delay germination in the presence of pathogens (eLIFE)

The rhizosphere represents a complex and dynamic environment that poses many challenges for seed germination and seedling establishment. While a number of well-characterized abiotic factors and hormone signaling pathways are known to contribute to the initiation of seed germination, our current understanding…

Agrobacterium tumefaciens enhances biosynthesis of two distinct auxins in crown galls ($) (Plant Cell Physiol.)

Kiyoshi et al. investigated auxin biosynthesis during the formation of crown galls by Agrobacterium tumefaciens. Agrobacterium introduces into the plant T-DNA containing two auxin biosynthesis genes iaaM (TRYPTOPHAN-2-MONOOXYGENASE) and iaaH (INDOLE-3-ACETAMIDE HYDROLASE). The authors used LC-MS/MS to…

A rationally designed JAZ subtype-selective agonist of jasmonate perception (Nature Comms.)

Many plant hormones have pleiotropic effects, switching on and off multiple, seemingly unrelated processes. As an example, jasmonates both turn on herbivore defense responses and suppress growth. Takaoka et al. have elegantly separated these, by developing a jasmonate mimic that only activates defences.…

CLASP sustains cell proliferation through a brassinosteroid signaling negative feedback loop ($) (Curr. Biol.)

Brassinostreroid (BR) regulates the development of the root apical meristem. High levels of BR have inhibitory effects on cell production rates in the meristem and low levels show the opposite effect. Ruan, Halat et al. showed that BR regulates microtubule-associated CLASP (CLIP-Associated Protein) expression…

Review: Harnessing synthetic chemistry to probe and hijack auxin signaling (New Phytol)

Auxin has been studied since Charles Darwin observed the phototropic response. More recently, chemical genetic approaches using auxin agonists and antagonists have been applied to studies of auxin. Torii et al. review how synthetic chemistry and chemical genetics have provided insights into and new tools…

Three auxin response factors promote hypocotyl elongation (Plant Physiol.)

By now we’re probably all familiar with the central dogma of auxin signalling; that the interaction between auxin and auxin receptors (e.g., TIR1) leads to degradation of Aux/IAA proteins, freeing up ARF transcription factors to do their things. The complexity of this simple system arises in part due…

Evolution and diversification of the plant gibberellin receptor GID1 (PNAS)

Giberellins (GA) are plant hormones that have diverse role in plant growth and development. Although many GAs have been identified, only few of them show functional activity in plants. GAs are perceived by the GID1 receptor, which is widespread in vascular plants and structuraly similar to carboxylesterases…

New Teaching Tool, "Small and mighty, peptide hormones in plant biology"

We're excited to annouce the publication of The Plant Cell's latest Teaching Tool, "Small and mighty: Peptide hormones in plant biology," by Sonali Roy, Peter Lundquist, Michael Udvardi, and Wolf-Rüdiger Scheible, available without subscription at Plantae.org. A phytohormone (plant hormone) is defined…

CDL1-OST1 Interaction as a Focal Point of Brassinosteroid-Abscisic Acid Hormone Signaling Crosstalk

Plants integrate signals in the form of light, humidity, temperature, CO2 concentrations and daily circadian rhythms. In addition, plants encounter pathogens, pests, herbivores and other stressors. Physiological processes like responding to stimuli, plant growth and development are usually governed and…