期刊
NEW PHYTOLOGIST
卷 216, 期 2, 页码 401-418出版社
WILEY
DOI: 10.1111/nph.14449
关键词
blastozone; computational model; directional growth; Hofmeister's rule; leaf development; PIN convergence point; shape diversity; vascular system
资金
- Human Frontiers Science Program
- Natural Sciences and Engineering Research Council of Canada
- BBSRC Research Development Fellowship [BB/G023905/1]
- Max Planck Society
- Plant Phenotyping and Imaging Research Centre
- Cluster of Excellence on Plant Sciences
- BBSRC [BB/G023905/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/G023905/1] Funding Source: researchfish
Eudicot leaves have astoundingly diverse shapes. The central problem addressed in this paper is the developmental origin of this diversity. To investigate this problem, we propose a computational model of leaf development that generalizes the largely conserved molecular program for the reference plants Arabidopsis thaliana, Cardamine hirsuta and Solanum lycopersicum. The model characterizes leaf development as a product of three interwoven processes: the patterning of serrations, lobes and/or leaflets on the leaf margin; the patterning of the vascular system; and the growth of the leaf blade spanning the main veins. The veins play a significant morphogenetic role as a local determinant of growth directions. We show that small variations of this model can produce diverse leaf shapes, from simple to lobed to compound. It is thus plausible that diverse shapes of eudicot leaves result from small variations of a common developmental program.
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