SPL13 controls a root apical meristem phase change by triggering oriented cell divisions

• 成果类型: Article
• 署名作者: Yang, Baojun; Sun, Yanbiao; Minne, Max; Ge, Yanhua; Yue, Qianru; Goossens, Vera; Mor, Eliana; Callebaut, Brenda; Bevernaege, Kevin; Winne, Johan M.; Audenaert, Dominique; De Rybel, Bert
• 署名单位: Ghent University; Flanders Institute for Biotechnology (VIB); Chinese Academy of Sciences; Institute of Genetics & Developmental Biology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Flanders Institute for Biotechnology (VIB); Ghent University; Ghent University; University of Munich
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-12190
• DOI: 10.1126/science.ado4298
• 发表日期: 2024-11-15
• 关键词: middle cortex formation; arabidopsis root; ground tissue; transcription factors; temporal regulation; gibberellin; scarecrow; gene; networks; differentiation

摘要

Oriented cell divisions are crucial for determining the overall morphology and size of plants, but what controls the onset and duration of this process remains largely unknown. Here, we identified a small molecule that activates root apical meristem (RAM) expression of SQUAMOSA PROMOTER BINDING PROTEIN-LIKE13 (SPL13) a known player in the shoot's juvenile-to-adult transition. This expression leads to oriented cell divisions in the RAM through SHORT ROOT (SHR) and cell cycle regulators. We further show that the RAM has distinct juvenile and adult phases typed by morphological and molecular characteristics and that SPL factors are crucially required for this transition in Arabidopsis and rice (Oryza sativa). In summary, we provide molecular insights into the age-dependent morphological changes occurring in the RAM during phase change.