Host microenvironment in potato-Phytophthora infestans interaction revealed by single-cell spatiotemporal...

Area of Science:

• Plant Pathology
• Molecular Biology
• Genomics

Background:

• Late blight, caused by Phytophthora infestans, is a major threat to potato production.
• Understanding potato-pathogen interactions at a cellular level is crucial for disease resistance.
• Previous studies lacked single-cell and spatial resolution of this interaction.

Purpose of the Study:

• To create a spatiotemporal transcriptome atlas of potato leaves infected with P. infestans at single-cell resolution.
• To elucidate the cellular and spatial heterogeneity of plant immune responses.
• To understand the infection strategies of P. infestans and potato's defense mechanisms.

Main Methods:

• Utilized Stereo-seq technology for spatiotemporal transcriptome analysis.
• Inoculated potato leaves with P. infestans.
• Retrieved major potato leaf cell types and analyzed transcriptional profiles.

Main Results:

• Identified distinct potato cell types and their specialized immune responses.
• Characterized P. infestans infection strategies.
• Differentiated pathogen-targeted cells (PTCs) and surrounding PTC cells (SPCs), revealing differential immune responses (cell wall reinforcement, redox homeostasis in PTCs; systemic signaling in SPCs).

Conclusions:

• Potato immune responses are heterogeneous and cell-type-specific during P. infestans infection.
• PTCs and SPCs integrate pathogen dynamics and host responses to modulate the microenvironment.
• Findings offer insights into plant-pathogen interactions and strategies for enhancing crop disease resistance.