Touch me not! Jasmonic acid and ethylene converge on gibberellins breakdown to regulate touch-induced morphogenesis

Article Plant Sciences

Ethylene and jasmonate signaling converge on gibberellin catabolism during thigmomorphogenesis in Arabidopsis

Lei Wang et al.

Summary: Touch induces ethylene production in Arabidopsis, which regulates GA metabolism through the ET and JA pathways to fine-tune GA4 content during thigmomorphogenesis.

PLANT PHYSIOLOGY (2023)

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Article Multidisciplinary Sciences

Mechanosensory trichome cells evoke a mechanical stimuli-induced immune response in Arabidopsis thaliana

Mamoru Matsumura et al.

Summary: Perceiving pathogen signals and environmental cues is crucial for plant immunity. This study reveals that trichomes in plants can sense external mechanical forces, such as raindrops, and induce the expression of defense-related genes through the propagation of intercellular calcium waves, providing early protection against microbial infections.

NATURE COMMUNICATIONS (2022)

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Article Multidisciplinary Sciences

Touch signaling and thigmomorphogenesis are regulated by complementary CAMTA3-and JA-dependent pathways

Essam Darwish et al.

Summary: Plants respond to mechanical stimuli by regulating their growth and defense mechanisms. This study identifies the molecular mechanisms of touch signaling and reveals that Piezo ion channels do not play a major role in touch-induced gene expression and thigmomorphogenesis. Instead, the receptor-like kinase Feronia acts as a strong negative regulator of the touch signaling pathway dependent on jasmonic acid. Furthermore, the calmodulin-binding transcriptional activators CAMTA1/2/3 are key regulators of the touch signaling pathway independent of jasmonic acid.

SCIENCE ADVANCES (2022)

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Article Multidisciplinary Sciences