Floral Development ofNelumbo nucifera(Nelumbonaceae)

The floral development ofNelumbo nuciferawas compared with that noted in previous studies ofNelumbo, Nymphaeaceae, and other basal angiosperms. Important features include developmental evidence of only two sepals, development of an androecial ring meristem, and an apocarpous gynoecium composed of as... Ausführliche Beschreibung

1. Person: Hayes, Virginia
Weitere Personen: Schneider, Edward L. verfasserin; Carlquist, Sherwin verfasserin
Quelle: in International journal of plant sciences : IJPS Vol. 161, No. S6 (2000), p. S183-S191
Weitere Artikel
Format: Online-Artikel
Sprache: English
Veröffentlicht: 2000
Beschreibung: Online-Ressource
Schlagworte: research-article
Nelumbo
flower development
androecial ring meristem
basal angiosperms
eudicots
Nymphaeales
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Anmerkung: 1 Author for correspondence. Current address: Ganna Walska Lotusland Foundation, 695 Ashley Road, Santa Barbara, California 93108, U.S.A.; e‐mail vahayes@lotusland.org .
Copyright: © 2000 by The University of Chicago. All rights reserved.
Zusammenfassung: The floral development ofNelumbo nuciferawas compared with that noted in previous studies ofNelumbo, Nymphaeaceae, and other basal angiosperms. Important features include developmental evidence of only two sepals, development of an androecial ring meristem, and an apocarpous gynoecium composed of ascidiate carpels that become embedded in an expanded receptacle. Secretory papillate trichomes cover the stigma and line the stylar canal. The unique apocarpous gynoecium, which lacks a conical residual floral apex, and a greatly expanded receptacle distinguish Nelumbonaceae from the Nymphaeaceae, as does the distinctive androecial ring.Nelumbois characterized by polysymmetric floral development, with some organs originating spirally (petals) and some in simultaneous whorls (stamens and carpels). This pattern of floral development, as well as the pattern of carpel closure by secretion, is common in several paleoherbs and eudicots and indicates phylogenetic affinity between Nelumbonaceae and basal angiosperms. Because of its unique floral development and anatomy,Nelumboappears to be an isolated member of the eudicot clade.
ISSN: 1537-5315

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