Renner, Tanya , Specht, Chelsea .
The Evolution of Plant Carnivory in the Caryophyllales.
The carnivorous plants of the angiosperm order Caryophyllales (core eudicot) have a unique evolutionary history, encompassing taxa that have diverse morphologies and including genera that have lost the ability to digest prey. Recently grouped within the order Caryophyllales by APG II, Droseraceae and Nepenthaceae were once classified by Cronquist in the subclass Dillenideae under the Nepenthales, along with Sarraceniaceae, because of the production of pitcher-like traps. Today, the closest relatives to the carnivorous Caryophyllales are hypothesized to be found within the families Polygonaceae and Plumbaginaceae. Interestingly, not all families in Caryophyllales that include carnivorous genera are entirely carnivorous. Sister families to Nepenthaceae have either lost the ability to catch and digest prey (Ancistrocladaceae) or only exhibit part-time carnivory (Dioncophyllaceae, Triphyophyllum). Past phylogenies for the Caryophyllales carnivorous plants and closely related non-carnivores included a variety of sampling limitations: phylogenies were produced for either one family only, with a single molecular marker, or with taxon sampling that did not include all genera. In this study, nuclear (ITS) and chloroplast (psbA-trnH) molecular markers were used to build a multi-locus phylogeny that encompasses all Caryophyllales carnivorous plant genera, helps resolve species relationships and contributes substantially to the Caryophyllales phylogeny.
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1 - University of California, Berkeley, Plant and Microbial Biology, 111 Koshland Hall MC 3102, Berkeley, CA, 94720-3102, USA
Presentation Type: Oral Paper:Papers for BSA Sections
Location: Magpie A/Cliff Lodge - Level B
Date: Tuesday, July 28th, 2009
Time: 8:00 AM