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Local expression of expansin induces the entire process of leaf development and modifies leaf shape

Pien, S, Wyrzykowska, J, McQueen-Mason, S (orcid.org/0000-0002-6781-4768), Smart, C and Fleming, A (2001) Local expression of expansin induces the entire process of leaf development and modifies leaf shape. Proceedings of the National Academy of Sciences of the United States of America. pp. 11812-11817. ISSN 1091-6490

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Expansins are a family of extracellular proteins proposed to play a key role in wall stress relaxation and, thus, in cell and tissue growth. To test the possible function of expansins in morphogenesis, we have developed a technique that allows transient local microinduction of gene expression in transgenic plants. We have used this system to manipulate expansin gene expression in various tissues. Our results indicate that local expansin expression within the meristem induces a developmental program that recapitulates the entire process of leaf formation. Moreover, local transient induction of expansin expression on the flank of developing primordia leads to the induction of ectopic lamina tissue and thus modulation of leaf shape. These data describe an approach for the local manipulation of gene expression and indicate a role for expansin in the control of both leaf initiation and shape. These results are consistent with the action of cell division-independent mechanisms in plant morphogenesis.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2002 by the National Academy of Sciences.
Institution: The University of York
Academic Units: The University of York > Biology (York) > Centre for Novel Agricultural Products (CNAP) (York)
Depositing User: Repository Officer
Date Deposited: 29 Jun 2005
Last Modified: 24 Jul 2016 00:17
Published Version: http://dx.doi.org/10.1073/pnas.191380498
Status: Published
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/533

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