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AOBPreview originally published online on August 9, 2006
Annals of Botany 2006 98(4):835-844; doi:10.1093/aob/mcl164
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© The Author 2006. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Relative Extents of Preformation and Neoformation in Tree Shoots: Analysis by a Deconvolution Method

YANN GUÉDON1, J. G. PUNTIERI2,*, S. SABATIER1 and D. BARTHÉLÉMY1

1 Unité Mixte de Recherche (UMR) Cirad-Cnrs-Inra-Ird-Université Montpellier 2, ‘botAnique et bioinforMatique de l'Architecture des Plantes’ (AMAP) TA40/PS2, Boulevard de la Lironde, 34398 Montpellier Cedex 5, France2 Departamento de Botánica, Universidad Nacional del Comahue, and CONICET, Quintral 1250, 8400 Bariloche, Argentina

* For correspondence. E-mail jpuntier{at}crub.uncoma.edu.ar

Received: 20 April 2006    Returned for revision: 24 May 2006    Accepted: 8 June 2006    Published electronically: 9 August 2006

• Background and Aims Neoformation is the process by which organs not preformed in a bud are developed on a growing shoot, generally after preformation extension. The study of neoformation in trees has been hindered due to methodological reasons. The present report is aimed at assessing the relative importance of preformation and neoformation in the development of shoots of woody species.

• Methods A deconvolution method was applied to estimate the distribution of the number of neoformed organs for eight data sets corresponding to four Nothofagus species and a Juglans hybrid.

• Key Results The number of preformed organs was higher and less variable than the number of neoformed organs. Neoformation contributed more than preformation to explain full-size differences between shoots developed in different positions within the architecture of each tree species.

• Conclusions Differences between the distributions of the numbers of preformed and neoformed organs may be explained by alluding to the duration of differentiation and extension for each of these groups of organs. The deconvolution of distributions is a useful tool for the analysis of neoformation and shoot structure in trees.

Key words: Preformation, neoformation, shoot, leaf primordia, deconvolution, Nothofagus, Juglans


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