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Anisotropic cell growth at the leaf base promotes age-related changes in leaf shape in Arabidopsis thaliana.
Tang, Hong-Bo; Wang, Juan; Wang, Long; Shang, Guan-Dong; Xu, Zhou-Geng; Mai, Yan-Xia; Liu, Ye-Tong; Zhang, Tian-Qi; Wang, Jia-Wei.
Afiliación
  • Tang HB; National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Shanghai 200032, China.
  • Wang J; University of Chinese Academy of Sciences (UCAS), Shanghai 200032, China.
  • Wang L; School of Statistics and Mathematics, Inner Mongolia University of Finance and Economics, Huhehaote 010070, China.
  • Shang GD; National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Shanghai 200032, China.
  • Xu ZG; National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Shanghai 200032, China.
  • Mai YX; University of Chinese Academy of Sciences (UCAS), Shanghai 200032, China.
  • Liu YT; National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Institute of Plant Physiology and Ecology (SIPPE), Shanghai 200032, China.
  • Zhang TQ; University of Chinese Academy of Sciences (UCAS), Shanghai 200032, China.
  • Wang JW; Core Facility Center of CEMPS, Institute of Plant Physiology and Ecology (SIPPE), Shanghai 200032, China.
Plant Cell ; 35(5): 1386-1407, 2023 04 20.
Article en En | MEDLINE | ID: mdl-36748203
Plants undergo extended morphogenesis. The shoot apical meristem (SAM) allows for reiterative development and the formation of new structures throughout the life of the plant. Intriguingly, the SAM produces morphologically different leaves in an age-dependent manner, a phenomenon known as heteroblasty. In Arabidopsis thaliana, the SAM produces small orbicular leaves in the juvenile phase, but gives rise to large elliptical leaves in the adult phase. Previous studies have established that a developmental decline of microRNA156 (miR156) is necessary and sufficient to trigger this leaf shape switch, although the underlying mechanism is poorly understood. Here we show that the gradual increase in miR156-targeted SQUAMOSA PROMOTER BINDING PROTEIN-LIKE transcription factors with age promotes cell growth anisotropy in the abaxial epidermis at the base of the leaf blade, evident by the formation of elongated giant cells. Time-lapse imaging and developmental genetics further revealed that the establishment of adult leaf shape is tightly associated with the longitudinal cell expansion of giant cells, accompanied by a prolonged cell proliferation phase in their vicinity. Our results thus provide a plausible cellular mechanism for heteroblasty in Arabidopsis, and contribute to our understanding of anisotropic growth in plants.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Arabidopsis / Proteínas de Arabidopsis / MicroARNs Idioma: En Revista: Plant Cell Asunto de la revista: BOTANICA Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Arabidopsis / Proteínas de Arabidopsis / MicroARNs Idioma: En Revista: Plant Cell Asunto de la revista: BOTANICA Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido