Sawchuk MG, Donner TJ, Scarpella E. Auxin transport-dependent, stage-specific dynamics of leaf vein formation.
PLANT SIGNALING & BEHAVIOR 2008;
3:286-9. [PMID:
19513220 PMCID:
PMC2634260 DOI:
10.4161/psb.3.5.5345]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2007] [Accepted: 11/28/2007] [Indexed: 05/18/2023]
Abstract
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.
Collapse