From EM to AI: Multiscale imaging of the secretory pathway with insights from plant cells.
Pain C, Farley E
Plant Signaling
Every tomato that sets fruit, every root that absorbs nutrients, every seed that germinates depends on microscopic cellular delivery networks—and understanding how plant cells manage these highways is what allows breeders to grow crops that thrive under drought or disease pressure.
Inside every plant cell there's an intricate internal postal system that ships proteins and fats to the right places at the right times—this is how roots know to absorb minerals, how leaves know to make chlorophyll, how flowers know to produce pollen. For decades scientists could only photograph this system in frozen, dead cells, but new microscopes and AI tools can now watch it move in living plants in real time. This review maps how our picture of this cellular machinery went from a blurry sketch to a high-definition movie, with plant cells playing a starring role in revealing details that animal cells couldn't show.
Key Findings
Electron microscopy established the foundational structural map of the cell's secretory organelles and confirmed the directional flow of cargo between compartments, but could only capture static snapshots of dead tissue.
Fluorescence and super-resolution microscopy bridged the gap between light and electron microscopes, making it possible to watch protein traffic and organelle movements in living plant cells at nanoscale resolution for the first time.
AI-driven image segmentation, denoising, and adaptive imaging now enable high-throughput, quantitative analysis of the secretory pathway—turning what was once a labor-intensive manual process into scalable, automated discovery.
chevron_right Technical Summary
Scientists review how decades of microscopy advances—from electron microscopes to AI-powered imaging—have transformed our understanding of how plant and animal cells move proteins and fats to where they're needed, revealing this internal delivery system to be far more dynamic and complex than once thought.
Abstract Preview
The secretory pathway is a central and evolutionarily conserved feature of eukaryotic cells, responsible for protein and lipid trafficking, membrane biogenesis, signalling, and cellular homeostasis...
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