Related Experiment Video
Updated: Feb 24, 2026
Comprehensive Spatial Profiling of Species-agnostic Transcriptomes via Stereo-seq
Published on: October 31, 2025
Integrating scRNA-seq and snRNA-seq with spatial transcriptomics to unlock the xylem puzzle
Mingke Wei1, Jo-Wei Allison Hsieh2,3, Jr-Fong Dang4
1National Key Laboratory for Development and Utilization of Forest Food Resources, Zhejiang Key Laboratory of Forest Genetics and Breeding, International Research Center for Plant Cell Wall, College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou, China.
Single-nucleus RNA sequencing complements single-cell RNA sequencing to map the full xylem development process in Populus, revealing coordinated gene expression for secondary cell wall formation and cell death.
Area of Science:
- Plant Biology
- Molecular Biology
- Developmental Biology
Background:
- Xylem development is crucial for plant growth and biomass, but late-stage processes like secondary cell wall deposition are poorly understood.
- Single-cell RNA sequencing (scRNA-seq) has limitations in capturing late-stage xylem cells due to protoplast isolation.
- Key phases such as secondary cell wall deposition and programmed cell death remain undercharacterized.
Purpose of the Study:
- To reconstruct a comprehensive developmental landscape of xylem formation in Populus.
- To overcome the limitations of scRNA-seq by incorporating single-nucleus RNA sequencing (snRNA-seq).
- To characterize late-stage xylem cells, including those with thickened secondary cell walls.
Main Methods:
- Performing single-nucleus RNA sequencing (snRNA-seq) on Populus stem-developing xylem.
- Integrating snRNA-seq data with existing scRNA-seq datasets.
- Utilizing anatomical validation, lignin autofluorescence, laser capture microdissection, differential gene expression, gene ontology analysis, unsupervised clustering, and support vector machine classification.
Main Results:
- snRNA-seq successfully enriched for deeper xylem layers involved in secondary cell wall deposition, complementing scRNA-seq's focus on early stages.
- A spatially and transcriptionally defined secondary cell wall zone was identified, linked to lignin biosynthesis.
- Gene expression patterns suggest coordinated regulation of secondary cell wall formation and programmed cell death initiation.
- Early-stage xylem cells exhibit greater transcriptomic heterogeneity than late-stage cells.
Conclusions:
- scRNA-seq and snRNA-seq platforms are highly compatible and complementary for studying plant development.
- The integrated approach overcomes individual technology limitations, providing a scalable framework for complex developmental trajectories.
- The study successfully reconstructed the complete xylem developmental continuum, from progenitor cells to programmed cell death.
