NDLI: Verhuellia is a segregate lineage in Piperaceae: more evidence from flower, fruit and pollen morphology, anatomy and development.

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Verhuellia is a segregate lineage in Piperaceae: more evidence from flower, fruit and pollen morphology, anatomy and development.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Samain, Marie-Stéphanie Vrijdaghs, Alexander Hesse, Michael Goetghebeur, Paul Jiménez Rodríguez, Francisco Stoll, Alexandra Neinhuis, Christoph Wanke, Stefan
Description	Country affiliation: Belgium Author Affiliation: Samain MS ( Ghent University, Department of Biology, Research Group Spermatophytes, B-9000 Gent, Belgium. MarieStephanie.Samain@UGent.be)
Abstract	BACKGROUND AND AIMS: The perianthless Piperales, i.e. Saururaceae and Piperaceae, have simple reduced flowers strikingly different from the other families of the order (e.g. Aristolochiaceae). Recent molecular phylogenies proved Verhuellia to be the first branch in Piperaceae, making it a promising subject to study the detailed structure and development of the flowers. Based on recently collected material, the first detailed study since 1872 was conducted with respect to morphology, anatomy and development of the inflorescence, pollen ultrastructure and fruit anatomy. METHODS: Original scanning electron microscopy (SEM), transmission electron microscopy (TEM) and light microscopy (LM) observations on Verhuellia lunaria were compared with those of Piperaceae, Saururaceae and fossils. KEY RESULTS: The inflorescence is an indeterminate spike with sessile flowers, each in the axil of a bract, developing in acropetal, helical succession. Flowers consist of two (occasionally three) stamens with basifixed tetrasporangiate anthers and latrorse dehiscence by a longitudinal slit. The gynoecium lacks a style but has 3-4 stigma branches and a single, basal orthotropous and unitegmic ovule. The fruit is a drupe with large multicellular epidermal protuberances. The pollen is very small, inaperturate and areolate, with hemispherical microechinate exine elements. CONCLUSIONS: Despite the superficial similarities with different genera of Piperaceae and Saururaceae, the segregate position of Verhuellia revealed by molecular phylogenetics is supported by morphological, developmental and anatomical data presented here. Unitegmic ovules and inaperturate pollen, which are synapomorphies for the genus Peperomia, are also present in Verhuellia.
File Format	HTM / HTML
ISSN	03057364
e-ISSN	10958290
DOI	10.1093/aob/mcq031
Journal	Annals of Botany
Issue Number	5
Volume Number	105
Language	English
Publisher	Oxford University Press
Publisher Date	2010-05-01
Publisher Place	Great Britain (UK)
Access Restriction	Open
Subject Keyword	Microscopy, Electron, Transmission Research Support, Non-u.s. Gov't Microscopy, Electron, Scanning Discipline Botany Anatomy & Histology Piperaceae Growth & Development Microscopy Ultrastructure Classification Pollen Angiosperms
Content Type	Text
Resource Type	Article
Subject	Plant Science

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Verhuellia is a segregate lineage in Piperaceae: more evidence from flower, fruit and pollen morphology, anatomy and development.

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Verhuellia is a segregate lineage in Piperaceae: more evidence from flower, fruit and pollen morphology, anatomy and development.