ArticleFrontiers in plant science2026
EXO70A1 governs both the timing and patterning of secondary cell wall deposition: evidence from an
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Mechanisms governing secondary cell wall (SCW) deposition during tracheary element (TE) differentiation are poorly understood, largely due to the inaccessibility of deeply embedded TEs within plant tissues. Although the Methods: Here, we establish an Results: We discovered that plasma membrane-localized EXO70A1 puncta undergo a distinct transition from random to linear localization dynamics during TE development. Disruption of EXO70A1 led to disorganized SCW patterns and irregular cell morphologies. Crucially, we observed that Discussion: These findings redefine EXO70A1 as a multifaceted regulator essential for TE development, revealing a previously unrecognized function for EXO70A1 in the temporal regulation of SCW initiation. Consequently, this platform not only offers a robust tool for dissecting targeted secretion but also establishes a critical foundation for future studies with broader downstream applications, such as single-cell omics analysis of TE development.
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