Publications

Authors:

Lara, Reale; Andrea, Porceddu; Luisa, Lanfaloni; Chiaraluce, Moretti; Zenoni, Sara; Pezzotti, Mario; Bruno, Romano; Francesco, Ferranti

Title:

Patterns of cell division and expansion in developing petals of Petunia hybrida

Year:

2002

Type of item:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Language:

Inglese

Referee:

Sì

Name of journal:

SEXUAL PLANT REPRODUCTION

ISSN of journal:

0934-0882

N° Volume:

15

:

Springer Verlag Germany:Tiergartenstrasse 17, D 69121 Heidelberg Germany:011 49 6221 3450, EMAIL: g.braun@springer.de, INTERNET: http://www.springer.de, Fax: 011 49 6221 345229

Page numbers:

123-132

Keyword:

Cell division; Petal development; Petunia hybrida

Short description of contents:

The definition of the patterns of cell division and expansion in plant development is of fundamental importance in understanding the mechanics of morphogenesis. By studying cell division and expansion patterns, we have assembled a developmental map of Petunia hybrida petals. Cycling cells were labelled with in situ markers of the cell cycle, whereas cell expansion was followed by assessing cell size in representative regions of developing petals. The outlined cell division and expansion patterns were related to organ asymmetry. Initially, cell divisions are uniformly distributed throughout the petal and decline gradually, starting from the basal part, to form a striking gradient of acropetal polarity. Cell areas, in contrast, increased first in the basal portion and then gradually towards the petal tip. This growth strategy highlighted a cell size control model based on cell-cycle departure time. The dorso-ventral asymmetry can be explained in terms of differential regulation of cell expansion. Cells of the abaxial epidermis enlarged earlier to a higher final extent than those of the adaxial epidermis. Epidermal appendage differentiation contributed to the remaining asymmetry. On the whole our study provides a sound basis for mutant analyses and to investigate the impact of specific (environmental) factors on petal growth.

Product ID:

34712

Handle IRIS:

11562/233512

Deposited On:

July 28, 2007

Last Modified:

November 13, 2022

Bibliographic citation:

Lara, Reale; Andrea, Porceddu; Luisa, Lanfaloni; Chiaraluce, Moretti; Zenoni, Sara; Pezzotti, Mario; Bruno, Romano; Francesco, Ferranti, Patterns of cell division and expansion in developing petals of Petunia hybrida «SEXUAL PLANT REPRODUCTION» , vol. 15 , 2002 , pp. 123-132

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