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After the book - Progress in parasitic plant research since Kuijt's Biology of Parasitic Flowering Plants (1969)

Nickrent, Daniel [1], Der, Joshua [1].

Santalaceae: phylogeny, taxonomy, and biogeography.

Santalaceae s. l. (sandalwoods plus Viscaceae) are a monophyletic group in Santalales that includes 44 genera and over 1000 species of herbaceous and woody perennial hemiparasites. Trophic modes encompass both root parasites and stem parasites (mistletoes). Molecular phylogenetic studies of Santalaceae s. l. have been conducted using nuclear small-subunit rDNA and chloroplast rbcL and matK. In combination, these sequences provide strong support for the following monophyletic groups: the Pyrularia clade (6 genera), the Thesium clade (6 genera), the Santalum clade (12 genera), the Amphorogyne clade (9 genera), and the Viscum clade (6 genera). Less support is obtained for a clade including Comandra (5 genera). Three monophyletic groups within the Santalum clade are resolved: the Osyris clade, the Anthobolus clade and the Antidaphne clade; the latter clade corresponds to the previously named family Eremolepidaceae. A number of morphological synapomorphies exist supporting the above clades. Alternate taxonomic classifications for Santalaceae s. l. that do or do not incorporate rank will be discussed. The molecular phylogenetic data can also be used to address biogeographic patterns. For example, the distributions of genera within the Pyrularia and Santalum clades show replicated track patterns with similar ages for trans-Atlantic (or trans-Pacific) divergences, thus suggesting similar responses to major global tectonic and climatic changes during the Cretaceous and Tertiary periods.


Related Links:
The Parasitic Plant Connection
The Parasitic Plant Connection


1 - Southern Illinois University, Department of Plant Biology, 1125 Lincoln Drive, Carbondale, Illinois, 62901-6509, USA

Keywords:
26S rDNA
18S rDNA
matK
rbcL
biogeography
Classification
mistletoe
parasitic plants.

Presentation Type: Symposium
Session: 16-1
Location: Ballroom 2 (Cliff Lodge)
Date: Monday, August 2nd, 2004
Time: 1:00 PM
Abstract ID:645


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