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Asymmetric cell division in plant development

Journal of Integrative Plant Biology 2023年第2期65卷 343-370页

作者： Yi Zhang Tongda Xu Juan Dong Plant Synthetic Biology Center Haixia Institute of Science and Technologyand College of Life SciencesFujian Agriculture and Forestry UniversityFuzhou 350002 China The Waksman Institute of Microbiology Rutgersthe State University of New JerseyPiscatawayNJ 08854USA Department of Plant Biology Rutgersthe State University of New JerseyNew BrunswickNJ 08891USA

Asymmetric cell division(ACD) is a fundamental process that generates new cell types during development in eukaryotic species.In plant development,post-embryonic organogenesis driven by ACD is universal and more important than in animals,in which organ pattern is preset during embryogenesis.Thus,plant development provides a powerful system to study molecular mechanisms underlying ACD.During the past decade,tremendous progress has been made in our understanding of the key components and mechanisms involved in this important process in plants.Here,we present an overview of how ACD is determined and regulated in multiple biological processes in plant development and compare their conservation and specificity among different model cell systems.We also summarize the molecular roles and mechanisms of the phytohormones in the regulation of plant ACD.Finally,we conclude with the overarching paradigms and principles that govern plant ACD and consider how new technologies can be exploited to fill the knowledge gaps and make new advances in the field.

关键词： asymmetric cell division peptide signaling phytohormonal signaling polarity proteins plant development transcription factors

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Dual roles of Crbumbs polarity complex during epithelial apical lumen formation in zebrafish

Dual roles of Crbumbs polarity complex during epithelial api...

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第二届全国发育生物学大会

作者： Jian Zou Xiangyun Wei Institute of Translational Medicine Zhejiang University

Apical lumen is a common and key step in the organogenesis of many organs,such as neural tube and intestines.However,the cellular and molecular mechanisms remain to be fully understood.In this study,we show that early-onset Cadherins mediate"self-organization"of a bilateral symmetrical neural rod by adhering apical cell surfaces at the midline through two distinct types of apical adhesion:Parallel adhesion coheres neighbor cells of the same orientations;and opposing adhesion coheres cells of opposite orientations.Subsequently,Crumbs complexes are required to down-regulate the opposing adhesion but enhance the parallel adhesion via Pard3-Pard6-aPKC-Cdc42 complex.Finally,late-onset Na/KATPase which localization is controlled by Crbumbs complex inflates a lumen by ion-transporting activity.This rod-to-tube stepwise construction of a bilateral symmetrical cytoarchitecture also underlies the morphogenesis of the intestines and possibly other tubular tissues.

关键词： polarity proteins Cell-cell adhesion Tubulogenesis Crbumbs complex Zebrafish

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