What question did this study set out to answer?

The research aims to elucidate the mechanisms by which Harpin Ea protein confers disease resistance in Rosa roxburghii.

March 16, 2026

Harpin Ea protein confers top rot resistance in Rosa roxburghii Tratt. through synergistic activation of structural defenses and the phenylpropanoid–flavonoid pathway

TWTingting WeiGuizhou Academy of Agricultural Sciences QWQiong WuGuizhou Institute of Plant Protection HZHandinghong ZhengGuizhou University

Key Points

The research aims to elucidate the mechanisms by which Harpin Ea protein confers disease resistance in Rosa roxburghii.
Investigated the role of Harpin Ea in enhancing physical barriers against pathogens.
Analyzed the activation of phenylpropanoid-flavonoid metabolic pathways.
Examined structural defenses in R. roxburghii post Harpin Ea treatment.
Harpin Ea significantly increased physical barriers to pathogens.
Activation of phenylpropanoid-flavonoid pathways was observed after treatment.
Elicitor application showed a clear molecular basis for improved disease resistance.

Abstract

Harpin Ea-induced resistance in R. roxburghii is mediated by a synergistic enhancement of physical barriers and systemic activation of phenylpropanoid-flavonoid metabolism. This work provides the first mechanistic evidence linking this dual-layer defense to Harpin Ea-induced disease resistance and establishes a molecular basis for the sustainable application of protein elicitors in fruit crop protection. © 2026 Society of Chemical Industry.

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