How Nitrogen Supply Affects Lettuce Resistance to Botrytis cinerea and Sclerotinia minor

Introduction:
Nitrogen is a crucial element in plant nutrition, influencing both growth and disease resistance. A recent study explores how different nitrogen levels impact lettuce’s susceptibility to fungal pathogens Botrytis cinerea and Sclerotinia minor. Researchers found that lower nitrogen concentrations improve resistance by reducing oxidative stress and enhancing polyphenol content.

For more groundbreaking research on plant science, visit https://www.plantsciencejournal.org/jpsp.

Study Overview:
The research investigated how three nitrogen regimes—low (2 mM), normal (10 mM), and high (20 mM)—affect lettuce susceptibility to fungal infections. Key findings include:

• Lower nitrogen (2 mM) led to increased resistance against both pathogens.
• Plants with high nitrogen levels (20 mM) exhibited larger lesion areas and greater oxidative stress.
• Increased polyphenol concentration correlated with enhanced disease resistance.

Nitrogen and Fungal Susceptibility:
Excess nitrogen fertilization can create a dense canopy, limiting ventilation and fostering fungal growth. Studies from external sources, such as the American Phytopathological Society, highlight how plant nutrition impacts disease resistance in various crops.

Key Findings & Implications:

• Low Nitrogen (2 mM): Higher phenolic content, lower oxidative stress, and reduced fungal lesions.
• High Nitrogen (20 mM): Increased oxidative damage and susceptibility to fungal infections.
• Optimal Nitrogen Management: Balancing nitrogen supply can enhance crop resilience and minimize post-harvest losses.

For a detailed analysis, read the full study at https://doi.org/10.29328/journal.jpsp.1001116.

Practical Applications:
Farmers and agronomists can optimize nitrogen application to:

• Reduce fungal diseases in lettuce and other leafy greens.
• Improve post-harvest quality and storage life.
• Maintain sustainable agricultural practices while ensuring high yield.

Conclusion & Call to Action:
This study underscores the importance of nitrogen management in sustainable agriculture. Implementing controlled nitrogen application can enhance plant resilience while reducing chemical inputs.

Explore more plant science studies at https://www.plantsciencejournal.org/jpsp and share your thoughts in the comments below!

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