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Leaf growth - complex regulation of a seemingly simple process

Journal

PLANT JOURNAL
Volume -, Issue -, Pages -

Publisher

WILEY
DOI: 10.1111/tpj.16558

Keywords

leaf growth; cell division; Arabidopsis thaliana; evolutionary conservation; DA1; PEAPOD; KLU; GRF; SWI/SNF; DELLA

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This article focuses on the genetic networks governing leaf cell proliferation and discusses the evolutionary conservation among species. It also explores the interconnectedness between these genetic pathways.
Understanding the underlying mechanisms of plant development is crucial to successfully steer or manipulate plant growth in a targeted manner. Leaves, the primary sites of photosynthesis, are vital organs for many plant species, and leaf growth is controlled by a tight temporal and spatial regulatory network. In this review, we focus on the genetic networks governing leaf cell proliferation, one major contributor to final leaf size. First, we provide an overview of six regulator families of leaf growth in Arabidopsis: DA1, PEAPODs, KLU, GRFs, the SWI/SNF complexes, and DELLAs, together with their surrounding genetic networks. Next, we discuss their evolutionary conservation to highlight similarities and differences among species, because knowledge transfer between species remains a big challenge. Finally, we focus on the increase in knowledge of the interconnectedness between these genetic pathways, the function of the cell cycle machinery as their central convergence point, and other internal and environmental cues.

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