Activation of Basal Cells of the Apical Meristem during Sepal Formation in Tomato

Fleming, Andrew J; Kuhlemeier, Cris (1994). Activation of Basal Cells of the Apical Meristem during Sepal Formation in Tomato. The Plant Cell, 6(6), pp. 789-798. American Society of Plant Biologists 10.2307/3869958

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Although great advances have been made in research on the regulation of primordium fate in the floral meristem, our understanding of the molecular events occurring during the floral transition remains incomplete. Via a careful analysis of the expression patterns of five genes encoding housekeeping functions during the floral transition in tomato (using both in situ hybridization and enzyme histochemistry), we identified a particular phase of floral development (sepal initiation) at which cells located toward the base of the meristem show a high level of cellular metabolism, whereas cells at the tip of the meristem dome show little activity. At other stages of floral development, the probes used showed gene-specific patterns of expression generally consistent with our previous investigation of the vegetative apical meristem. Our data, in conjunction with other reports in the literature, enabled us to postulate that relative activation of basal cells of the meristem may be of general occurrence during the transition to flowering. Such a hypothesis could account for recent observations using periclinal chimeras on the effect of L3 genotypes on flower development and have a bearing on the expected mechanism by which the number of primordia generated by a floral meristem is regulated.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Development
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Kuhlemeier, Cris

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

1040-4651

Publisher:

American Society of Plant Biologists

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

04 Jul 2017 11:20

Last Modified:

04 Jul 2017 11:20

Publisher DOI:

10.2307/3869958

BORIS DOI:

10.7892/boris.97868

URI:

https://boris.unibe.ch/id/eprint/97868

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