A modified Agrobacterium-mediated transformation for two oomycete pathogens.

Area of Science:

• Plant Pathology
• Microbiology
• Molecular Biology

Background:

• Oomycetes pose significant threats to food security and ecosystems.
• Limited genetic manipulation methods hinder understanding of oomycete pathogenesis and development.

Purpose of the Study:

• To develop improved genetic transformation and genome editing methods for oomycetes.
• To enhance molecular studies in Phytophthora infestans and Plasmopara viticola.

Main Methods:

• Modified Agrobacterium-mediated transformation (AMT) using Arabidopsis AtVIP1.
• CRISPR/Cas12a genome editing for targeted mutagenesis.
• Analysis of gene function through loss-of-function mutations.

Main Results:

• Increased transformation efficiency in Phytophthora infestans strains.
• Successful generation of GFP transformant in Plasmopara viticola.
• Generated loss-of-function mutations in MADS-box and Avr8 genes in P. infestans, revealing roles in sporulation, virulence, and host immune evasion.

Conclusions:

• The developed methods significantly advance genetic manipulation capabilities in oomycetes.
• This system provides a powerful tool for accelerating research into oomycete molecular biology and pathogenicity.
• Facilitates deeper understanding of oomycete-plant interactions and development of control strategies.