Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by PAOLILLO, D. J.
Right arrow Articles by KEYES, G. J.
Right arrow Search for Related Content
PubMed
Right arrow Articles by PAOLILLO, D. J., JR.
Right arrow Articles by KEYES, G. J.
Agricola
Right arrow Articles by PAOLILLO, D. J.
Right arrow Articles by KEYES, G. J.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Annals of Botany 67: 479-485, 1991
© 1991 Annals of Botany Company

RESEARCH-ARTICLE

Gibberellic Acid Sensitivity Determines the Length of the Extension Zone in Wheat Leaves

D. J. PAOLILLO, JR.*,§, M. E. SORRELLS{dagger} and G. J. KEYES{ddagger}

*Section of Plant Biology, Cornell University Ithaca, NY 14853
{dagger}Department of Plant Breeding and Biometry, Cornell University Ithaca, NY 14853
{ddagger}Monsanto Company, St Louis MO 63167, USA

§For correspondence at: Section of Plant Biology, 228 Plant Science Building, Cornell University, Ithaca, NY 14853, USA.

Accepted: 14 January 1991   

To test the hypothesis that gibberellic acid (GA) sensitivity affects the length of the extension zone (LEZ) of leaf No. 1 of wheat seedlings, we performed a gene dosage experiment using Rht dwarfing genes that condition GA insensitivity. We utilized nearly isogenic lines, at Rht-dosage levels of 0, 2 and 4 alleles. Anatomical markers (distances between successive stomates) were used to infer the distribution of growth along the axis of the leaf. Interstomatal distance (ISD) and LEZ were inverse linear functions of Rht-dosage. The number of stomates matured per hour was independent of Rht-dosage. The relationship between ISD and distance along the axis within the extension zone (EZ) was indistinguishable from linear. Rht-dosage did not affect the slope of the regression of ISD against distance along the EZ. A-REST (AR; ancymidol, a potent GA synthesis inhibitor) reduced LEZ. Wild type was more sensitive to AR than double dwarf. AR affected growth of leaf No. 1 more than length of the coleoptile, regardless of Rht-dosage. AR-dosage affected cell division, whereas Rht-dosage did not.

Extension zone, elongation, gibberellic acid, Rht, wheat, Triticum aesiivum L.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Crop Sci.Home page
J. D. Klein and Y. Hebbe
Tetcyclacis and Abscisic Acid Differentially Affect Growth of Wheat (Triticum aestivum L.) Seedlings Isogenic for Reduced-Height Genes
Crop Sci., November 1, 2000; 40(6): 1702 - 1705.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
C. L. Wenzel, R. E. Williamson, and G. O. Wasteneys
Gibberellin-Induced Changes in Growth Anisotropy Precede Gibberellin-Dependent Changes in Cortical Microtubule Orientation in Developing Epidermal Cells of Barley Leaves. Kinematic and Cytological Studies on a Gibberellin-Responsive Dwarf Mutant, M489
Plant Physiology, October 1, 2000; 124(2): 813 - 822.
[Abstract] [Full Text]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.