TY - JOUR
T1 - Straightening out the screw-pines
T2 - A first step in understanding phylogenetic relationships within Pandanaceae
AU - Buerki, Sven
AU - Callmander, Martin W.
AU - Devey, Dion S.
AU - Chappell, Lauren
AU - Gallaher, Timothy
AU - Munzinger, Jérôme
AU - Haevermans, Thomas
AU - Forest, Félix
PY - 2012/10
Y1 - 2012/10
N2 - The Paleotropical monocot family Pandanaceae includes ca. 700 species assigned to four genera: Pandanus (ca. 500 spp.), Freycinetia (ca. 200 spp.), Martellidendron (6 spp.) and Sararanga (2 spp.). The most speciose genus, Pandanus, was classically subdivided into eight subgenera. Previous cladistic analyses revealed that several key morphological characters might have evolved independently several times, thus highlighting the need for a robust molecular phylogenetic framework to elucidate phylogenetic relationships and infrafamilial and infrageneric classification within this group. In this study, three plastid DNA regions (matK, trnQ-rps16, trnL-trnF) and 200 individuals (representing 134 species and 609 newly produced sequences)-spanning the taxonomic and biogeographic diversity of the family-are analyzed to test the monophyly at the familial and generic levels, and to infer phylogenetic relationships within the family. Particular emphasis is devoted to Pandanus with the aim of recognizing key morphological characters that reflect the evolutionary history of the genus. Phylogenetic inferences support the monophyly of Pandanaceae and establish Sararanga as sister to the rest of the family, with Freycinetia as sister to the Pandanus-Martellidendron pair. Although relationships are not well-resolved within the latter clade, three supported lineages are retrieved: (1) the Acrostigma clade comprising taxa of P. subg. Acrostigma, (2) the Martellidendron clade including taxa assigned to the genus Martellidendron and (3) the core Pandanus clade including taxa of all other subgenera of Pandanus. Morphological and biogeographic evidence supporting clade definitions are discussed in detail. This study provides the first phylogenetic backbone for Pandanaceae, which is sufficiently robust to serve as a springboard for future research into the evolutionary history of this neglected family.
AB - The Paleotropical monocot family Pandanaceae includes ca. 700 species assigned to four genera: Pandanus (ca. 500 spp.), Freycinetia (ca. 200 spp.), Martellidendron (6 spp.) and Sararanga (2 spp.). The most speciose genus, Pandanus, was classically subdivided into eight subgenera. Previous cladistic analyses revealed that several key morphological characters might have evolved independently several times, thus highlighting the need for a robust molecular phylogenetic framework to elucidate phylogenetic relationships and infrafamilial and infrageneric classification within this group. In this study, three plastid DNA regions (matK, trnQ-rps16, trnL-trnF) and 200 individuals (representing 134 species and 609 newly produced sequences)-spanning the taxonomic and biogeographic diversity of the family-are analyzed to test the monophyly at the familial and generic levels, and to infer phylogenetic relationships within the family. Particular emphasis is devoted to Pandanus with the aim of recognizing key morphological characters that reflect the evolutionary history of the genus. Phylogenetic inferences support the monophyly of Pandanaceae and establish Sararanga as sister to the rest of the family, with Freycinetia as sister to the Pandanus-Martellidendron pair. Although relationships are not well-resolved within the latter clade, three supported lineages are retrieved: (1) the Acrostigma clade comprising taxa of P. subg. Acrostigma, (2) the Martellidendron clade including taxa assigned to the genus Martellidendron and (3) the core Pandanus clade including taxa of all other subgenera of Pandanus. Morphological and biogeographic evidence supporting clade definitions are discussed in detail. This study provides the first phylogenetic backbone for Pandanaceae, which is sufficiently robust to serve as a springboard for future research into the evolutionary history of this neglected family.
KW - Freycinetia
KW - Martellidendron
KW - Pandanaceae
KW - Pandanus
KW - Phylogenetic inference
KW - Sararanga
UR - http://www.scopus.com/inward/record.url?scp=84867791107&partnerID=8YFLogxK
U2 - 10.1002/tax.615008
DO - 10.1002/tax.615008
M3 - Article
AN - SCOPUS:84867791107
SN - 0040-0262
VL - 61
SP - 1010
EP - 1020
JO - Taxon
JF - Taxon
IS - 5
ER -