Plants perceive ethylene through a family of receptors located on the endoplasmic reticulum membrane. In the absence of ethylene, these receptors inhibit a downstream signaling cascade; when ethylene binds, the inhibition is lifted, allowing a signal to propagate that ultimately stabilizes specific transcription factors and alters gene expression.
Ethylene Function in Pathogen Defense Activation
Cross-talk between ethylene and brassinosteroids or gibberellins fine-tunes growth adjustments, ensuring that developmental decisions balance resource allocation and environmental cues. These fruits generate a burst of ethylene during ripening, which initiates a cascade of biochemical changes including starch conversion to sugars, softening of cell walls, and development of characteristic color and aroma.
From seed germination to fruit ripening and response to stress, this simple two-carbon molecule coordinates complex developmental programs that determine crop yield and quality. In mature plants, ethylene influences leaf abscission, flower senescence, and root initiation.
Ethylene Function in Pathogen Defense Activation
Response to Biotic and Abiotic Stress Under stress conditions such as drought, flooding, or pathogen attack, ethylene function becomes a critical coordinator of defense and adaptation. In some species, it can trigger the transition from vegetative to reproductive growth, ensuring that flowering coincides with favorable environmental conditions.
More About Ethylene function
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