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Enhancing Fruit Resistance against Fungal Pathogens Using a Pathogen-Associated Molecular Pattern PdEIX
1Key Laboratory of Plant Hormones and Molecular Breeding of Chongqing, School of Life Sciences, Chongqing University, Chongqing 401331, China.
Journal of Agricultural and Food Chemistry
|December 24, 2024
Summary
Researchers identified a microbial protein, PdEIX, that triggers plant immunity. Applying this pathogen-associated molecular pattern (PAMP) enhances fruit resistance against fungal diseases, offering a new strategy for reducing postharvest losses.
Area of Science:
- Plant Pathology
- Molecular Biology
- Biochemistry
Background:
- Postharvest fungal diseases cause significant global fruit losses.
- Pathogen-associated molecular patterns (PAMPs) are microbial molecules recognized by plants, initiating PAMP-triggered immunity.
- Understanding PAMPs is crucial for developing strategies against plant pathogens.
Purpose of the Study:
- To identify and characterize a novel PAMP from *Penicillium digitatum* with plant immunity-inducing activity.
- To investigate the role of PdEIX in plant immune responses and its potential application in controlling postharvest fruit diseases.
Main Methods:
- Identification of PdEIX protein from *Penicillium digitatum*.
- Assaying PdEIX apoplastic localization and its interaction with plant immune components (NbEIX2, BAK1) in *Nicotiana benthamiana*.
- Evaluating PdEIX-induced immune responses and disease resistance in citrus and other fruits.
Main Results:
- PdEIX was identified as a protein elicitor with plant immunity-inducing activity.
- PdEIX requires plant receptor-like protein NbEIX2 and receptor-like kinase BAK1 for triggering plant cell death.
- PdEIX application enhanced resistance in citrus and other fruits against fungal pathogens.
Conclusions:
- PdEIX is a functional PAMP that elicits plant immune responses.
- Utilizing microbial PAMPs like PdEIX is a promising strategy for controlling postharvest fungal diseases in fruits.
- This approach offers a novel method to enhance fruit shelf-life and reduce economic losses.
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