The manner by which plant organs gain their shape is a longstanding question in developmental biology. Leaves, as typical lateral organs, are initiated from the shoot apical meristem that harbors stem cells. Leaf morphogenesis is accompanied by cell proliferation and specification to form the specific 3D shapes, with flattened lamina being the most common. Here, we briefly review the mechanisms controlling leaf initiation and morphogenesis, from periodic initiation in the shoot apex to the formation of conserved thin-blade and divergent leaf shapes. We introduce both regulatory gene patterning and biomechanical regulation involved in leaf morphogenesis. How phenotype is determined by genotype remains largely unanswered. Together, these new insights into leaf morphogenesis resolve molecular chains of events to better aid our understanding.
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The cover of this edition of Biochemical Society Transactions features a super-resolution image of mouse heart mitochondria. Shammas, Huang and Narendra discuss the present understanding of neurodegeneration and myopathy caused by mutations in the mitochondrial proteins CHCHD2 and CHCHD10, and putting forth potential therapeutic strategies to combat these diseases in ‘CHCHD2 and CHCHD10-related neurodegeneration: molecular pathogenesis and the path to precision therapy’ on pp 797-809.
Morphogenesis of leaves: from initiation to the production of diverse shapes
Ziyuan Peng, Yuling Jiao, Ying Wang; Morphogenesis of leaves: from initiation to the production of diverse shapes. Biochem Soc Trans 26 April 2023; 51 (2): 513–525. doi: https://doi.org/10.1042/BST20220678
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