ArticleFrontiers in plant science2023
3D cellular morphometrics of ovule primordium development in
Article in Frontiers in plant science, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 7 citations in OpenAlex.
- Review
- 3D Imaging, Segmentation, and Cell Annotation of the Ovule During Megaspore Mother Cell Differentiation in Paspalum spp.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Topological analysis of 3D digital ovules identifies cellular patterns associated with ovule shape diversity.Development (Cambridge, England) · 2024Article
- A deep learning-based toolkit for 3D nuclei segmentation and quantitative analysis in cellular and tissue context.Development (Cambridge, England) · 2024Article
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Authors and funding
9 authors at 4 institutions in 3 countries.
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No grant is acknowledged in the PubMed record.
Abstract
Introduction: Differentiation of spore mother cells marks the somatic-to-reproductive transition in higher plants. Spore mother cells are critical for fitness because they differentiate into gametes, leading to fertilization and seed formation. The female spore mother cell is called the megaspore mother cell (MMC) and is specified in the ovule primordium. The number of MMCs varies by species and genetic background, but in most cases, only a single mature MMC enters meiosis to form the embryo sac. Multiple candidate MMC precursor cells have been identified in both rice and Methods: We generated a collection of 48 three-dimensional (3D) ovule primordium images for five developmental stages, annotated for 11 cell types. Quantitative analysis of ovule and cell morphological descriptors allowed the reconstruction of a plausible developmental trajectory of the MMC and its neighbors. Results: The MMC is specified within a niche of enlarged, homogenous L2 cells, forming a pool of candidate archesporial (MMC progenitor) cells. A prevalent periclinal division of the uppermost central archesporial cell formed the apical MMC and the underlying cell, a presumptive stack cell. The MMC stopped dividing and expanded, acquiring an anisotropic, trapezoidal shape. By contrast, periclinal divisions continued in L2 neighbor cells, resulting in a single central MMC. Discussion: We propose a model where anisotropic ovule growth in maize drives L2 divisions and MMC elongation, coupling ovule geometry with MMC fate.
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