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Bücher Englische Bücher Wissen & Bildung Naturwissenschaft, Medizin, Informatik, Technik Biologie Botanik Orchid seed diversity: A scanning electron microscopy survey
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Orchid seed diversity: A scanning electron microscopy survey
Wilhelm Barthlott, Bernadette Große-Veldmann, Nadja Korotkova (Broschiert, Englisch)
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Beschreibung
The Orchidaceae with some 22 000 species is one of the two largest plant families. Despite of the vast literature on orchids, rather little is known about their seeds, which are generally considered as wind dispersed, small and reduced “dust seeds”.
Based on some 1400 collections of orchid seeds analysed by SEM and other methods over the last four decades, about 7000 micrographs of some… 1100 species from 352 (out of c. 880) genera were evaluated for this first monograph on orchid seeds.
Orchid seeds exhibit an astonishing diversity. This is not only reflected in their sizes (between 0.1 mm in Oberonia and 6 mm in Epidendrum) and shapes, but especially in the complexity of their lightweight seed-coat architecture and hierarchical surface sculpturing. A consistent terminology for characters of the orchid seed coat is proposed.
Taxa at subtribal to tribal levels are often well characterized by seed-coat characters. Fifteen selected characters were mapped on well-supported molecular phylogenetic trees and were found to be largely consistent with the major clades. Combinations of characters classified into 17 seed types often delimit tribes (e.g. Cymbidieae, Epidendreae, Vandeae). Highly specialized features like polyembryony (up to 12 embryos per seed in Thecostele) or highly adaptive (with respect to dispersal biology) seed-coat features (e.g. in Galeola, or the sophisticated seed-attachment mechanism of Chiloschista) are restricted to only a few genera.
This monograph provides a first atlas (624 micrographs) and data to identify the major groups of orchid seeds and a terminology for taxonomic purposes. The first character reconstruction of seed characters based on modern molecular phylogenetic hypotheses allows an application for further systematic studies of the family. Dieses Produkt haben wir gerade leider nicht auf Lager.
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Technische Daten
Erscheinungsdatum
02.12.2014
Sprache
Englisch
EAN
9783921800928
Herausgeber
Freie Universität Bln Botanischer Garten
Serien- oder Bandtitel
Englera
Sonderedition
Nein
Autor
Wilhelm Barthlott, Bernadette Große-Veldmann, Nadja Korotkova
Seitenanzahl
245
Einbandart
Broschiert
Bandzählung
32
Schlagwörter
dispersal biology, Orchidaceae, seeds, surface, phylogeny, orchids, SEM, taxonomy, micromorphology, testa
Thema-Inhalt
P - Mathematik und Naturwissenschaften
PDC - Naturwissenschaftliche Nomenklatur und Klassifikation
PST - Botanik und Pflanzenwissenschaften
PSA - Biowissenschaften, allgemein
PSAB - Taxonomie und Systematik
PD - Naturwissenschaften, allgemein
PS - Biologie, Biowissenschaften
Höhe
250 mm
Breite
17.6 cm
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