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Review

Auxin transport-dependent, stage-specific dynamics of leaf vein formation

Megan G. Sawchuk, Tyler J. Donner and Enrico Scarpella

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For centuries, the formation of vein patterns in the leaf has intrigued biologists, mathematicians and philosophers. In leaf development, files of vein-forming procambial cells emerge from seemingly homogeneous subepidermal tissue through the selection of anatomically inconspicuous preprocambial cells. Although the molecular details underlying the orderly differentiation of veins in the leaf remain elusive, gradually restricted transport paths of the plant hormone auxin have long been implicated in defining sites of vein formation. Several recent advances now appear to converge on a more precise definition of the role of auxin flow at different stages of vascular development. The picture that emerges is that of vein formation as a self-organizing, reiterative, auxin transport-dependent process.

Authors

Megan G. Sawchuk

Department of Biological Sciences; University of Alberta; Edmonton AB, Canada

Tyler J. Donner

Department of Biological Sciences; University of Alberta; Edmonton AB, Canada

Enrico Scarpella

Department of Biological Sciences; University of Alberta; Edmonton AB, Canada

Purchase article for $19

Subscribe to this journal for $79/year