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FOLIAR SCLEREIDS IN DIONYSIA (PRIMULACEAE) FROM A PHYLOGENETIC PERSPECTIVE

Published online by Cambridge University Press:  04 August 2006

I. TRIFT  and
A. A. ANDERBERG
I. TRIFT
Affiliation:
Department of Phanerogamic Botany, Swedish Museum of Natural History, PO Box 50007, 104 05 Stockholm, Sweden
A. A. ANDERBERG
Affiliation:
Department of Phanerogamic Botany, Swedish Museum of Natural History, PO Box 50007, 104 05 Stockholm, Sweden
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Abstract

Sclereid presence and distribution were studied in leaves from 50 species of Dionysia (Primulaceae). Of 16 species not previously investigated, 11 were shown to possess sclereids. The sclereids are dermal, terminal or diffused (according to the position in the leaf) and develop from different tissues, and hence are not homologous structures. The presence of different types of sclereids in different species is discussed. Sclereid characters are optimized on a cladogram based on an analysis of three DNA regions. Some clades are associated with certain types of sclereids. Terminal sclereids are most common in Iran, and diffused sclereids in Afghanistan. The evolution of sclereids in the genus is discussed, and a redefinition of what can be called a sclereid in Dionysia is presented.

Keywords

Dionysialeaf sclereidsphylogenyPrimulaPrimulaceaestone cells
Type
Articles
Information
Edinburgh Journal of Botany , Volume 63 , Issue 1 , March 2006 , pp. 21 - 48
Copyright
2006, Trustees of the Royal Botanic Garden, Edinburgh

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