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Type of publication: Journal Article
Type of document: Full Paper

Year: 2021

Authors: Bayle, V; Fiche, JB; Burny, C; Platre, MP; Nollmann, M; Martinière, A; Jaillais, Y

Title: Single-particle tracking photoactivated localization microscopy of membrane proteins in living plant tissues.

Source: Nat Protoc. 2021; 16(3):1600-1628

Authors Vetmeduni Vienna:

Burny Claire Delphine

Vetmed Research Units
Institute of Population Genetics

Project(s): Population Genetics

Super-resolution microscopy techniques have pushed the limit of optical imaging to unprecedented spatial resolutions. However, one of the frontiers in nanoscopy is its application to intact living organisms. Here we describe the implementation and application of super-resolution single-particle tracking photoactivated localization microscopy (sptPALM) to probe single-molecule dynamics of membrane proteins in live roots of the model plant Arabidopsis thaliana. We first discuss the advantages and limitations of sptPALM for studying the diffusion properties of membrane proteins and compare this to fluorescence recovery after photobleaching (FRAP) and fluorescence correlation spectroscopy (FCS). We describe the technical details for handling and imaging the samples for sptPALM, with a particular emphasis on the specificity of imaging plant cells, such as their thick cell walls or high degree of autofluorescence. We then provide a practical guide from data collection to image analyses. In particular, we introduce our sptPALM_viewer software and describe how to install and use it for analyzing sptPALM experiments. Finally, we report an R statistical analysis pipeline to analyze and compare sptPALM experiments. Altogether, this protocol should enable plant researchers to perform sptPALM using a benchmarked reproducible protocol. Routinely, the procedure takes 3-4 h of imaging followed by 3-4 d of image processing and data analysis.

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