Rice Lectin Protein r40c1 Interacts With Magnaporthe oryzae Sho1 Protein to Regulate Leaf Blast Resistance

Area of Science:

• Plant pathology
• Molecular biology
• Biochemistry

Background:

• Lectins are crucial for plant stress tolerance.
• Osr40c1 confers osmotic stress tolerance in rice.
• The role of Osr40c1 in biotic stress resistance was previously unknown.

Purpose of the Study:

• To investigate the role of Osr40c1 in rice's defense against leaf blast disease.
• To elucidate the molecular mechanism underlying Osr40c1-mediated biotic stress resistance.

Main Methods:

• Gene expression analysis of Osr40c1 during infection.
• Generating and testing Osr40c1 overexpressing rice plants.
• In silico and in-depth analysis of Osr40c1-MoSho1 interaction.
• Assessing disease resistance in plants overexpressing Osr40c1 domains.

Main Results:

• Osr40c1 gene expression increased post-inoculation, then decreased.
• Osr40c1 overexpression enhanced resistance to Magnaporthe oryzae.
• Osr40c1 interacts with MoSho1 via its C-terminal ARG-201 residue.
• Overexpression of the Osr40c1 C-terminal domain boosted disease resistance.

Conclusions:

• Osr40c1 plays a significant role in rice's defense against leaf blast.
• The interaction between Osr40c1 and MoSho1 is critical for disease resistance.
• Osr40c1 represents a potential target for improving crop resilience.