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Updated: Jun 14, 2026

Direct Observation and Automated Measurement of Stomatal Responses to Pseudomonas syringae pv. tomato DC3000 in Arabidopsis thaliana

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Plant mediator: mediating the jasmonate response.

Brendan N Kidd¹, Elizabeth A Aitken, Peer M Schenk

¹Commonwealth Scientific and Industrial Research Organization, Plant Industry, Queensland Bioscience Precinct, St Lucia, QLD, Australia.

Plant Signaling & Behavior

|April 13, 2010

Summary

Phytochrome and flowering time 1 (PFT1) protein regulates jasmonate (JA) signaling, impacting plant defense and development. The pft1 mutant shows reduced JA-responsive gene expression and altered fungal pathogen resistance.

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Area of Science:

Plant molecular biology
Plant signaling pathways
Gene regulation in plants

Background:

Jasmonate (JA) signaling is crucial for plant defense and development.
The phytochrome and flowering time 1 (PFT1) gene encodes the MED25 subunit of the plant Mediator complex.
Previous studies identified PFT1 as a regulator of JA-responsive transcription.

Discussion:

This study investigates the precise role of PFT1/MED25 within the JA signaling pathway.
Examines how PFT1/MED25 functions in mediating the plant's response to JA.
Connects PFT1/MED25's function to observed phenotypes in the pft1 mutant.

Key Insights:

The pft1 mutant exhibits attenuated expression of numerous JA-responsive genes.
pft1 mutants display altered resistance to fungal pathogens, indicating a role in plant immunity.
PFT1/MED25 is positioned as a key mediator in the JA signaling cascade.

Outlook:

Further elucidation of PFT1/MED25's molecular mechanisms in JA response.
Exploring the broader implications of PFT1/MED25 in plant development and defense strategies.
Investigating potential applications in crop improvement for enhanced pathogen resistance.