Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-5240
Authors: | Claßen-Bockhoff, Regine Frankenhäuser, Hebert |
Title: | The ‘male flower’ of Ricinus communis (Euphorbiaceae) interpreted as a multi-flowered unit |
Online publication date: | 21-Oct-2020 |
Year of first publication: | 2020 |
Language: | english |
Abstract: | One of the most exciting questions in botany refers to the nature of the angiosperm flower. While most flowering structures are easily identified as flowers, there are few examples lying in-between flowers and inflorescences. Such an example is the staminate unit (‘male flower’) in Ricinus communis (Euphorbiaceae) famous for its branched ‘staminal trees.’ The units were controversially interpreted in the past. Today, they are seen as flowers with multiple branched stamen-fascicles. In the present paper, the recently described floral unit meristem is used to reinterpret the staminate units in Ricinus. This meristem shares almost all characteristics with a flower meristem, but differs from it in the number of fractionation steps resulting in multi-flowered units. Reinvestigation of the development confirms previous studies illustrating up to six fractionation steps before the meristem merges into anther-formation. Fractionation starts early at a naked meristem, covers simultaneously its whole surface, shows an all-side instead of unidirectional splitting pattern and continues repeatedly. Based on the present knowledge, it is plausible to interpret the ‘male flower’ as a floral unit with multiple staminate flowers each reduced to a single anther. This interpretation is in accordance with the many examples of reduced flowers in the Euphorbiaceae. |
DDC: | 570 Biowissenschaften 570 Life sciences |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 10 Biologie |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-5240 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/4.0/ |
Journal: | Frontiers in cell and developmental biology 8 |
Pages or article number: | Art. 313 |
Publisher: | Frontiers Media |
Publisher place: | Lausanne |
Issue date: | 2020 |
ISSN: | 2296-634X |
Publisher URL: | https://doi.org/10.3389/fcell.2020.00313 |
Publisher DOI: | 10.3389/fcell.2020.00313 |
Appears in collections: | JGU-Publikationen |
Files in This Item:
File | Description | Size | Format | ||
---|---|---|---|---|---|
claßen_bockhoff_regine-the_‘male_flow-20201021094129518.pdf | 3.52 MB | Adobe PDF | View/Open |