The phylogeny of Ayenia, Byttneria, and Rayleya (Malvaceae s. l.) and its implications for the evolution of growth forms

Barbara A Whitlock, Amanda M. Hale

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Tropical plants show a diversity of growth forms, yet few phylogenies are available to examine the transitions between trees, shrubs, and lianas. Here, we reconstruct relationships among 37 species of Ayenia, Byttneria, and Rayleya with cpDNA sequences, and use the resulting phylogeny to test hypotheses on the evolution of climbing plants and to examine biogeography of these plants. Results show that Rayleya is sister to a combined clade of Ayenia and Byttneria; Byttneria is paraphyletic with Ayenia nested within it. The common ancestor of the combined Ayenia/Byttneria/Rayleya clade is reconstructed as a neotropical tree or shrub. Within the Ayenia/Byttneria clade, there is a single transition to unarmed lianas, with subsequent radiations into the Asian and African tropics. A second independent transition from trees or shrubs to spiny, semi-scandent shrubs occurred in the neotropics. We found no evidence of transitions from lianas to any other growth form; however, we recovered a reversal from semi-scandent shrubs to fully upright plants. Within the neotropics, there are two independent radiations into seasonal, open habitats. Additional sampling of African species of Byttneria may yield more complicated scenarios in both biogeography and the evolution of growth forms.

Original languageEnglish
Pages (from-to)129-136
Number of pages8
JournalSystematic Botany
Volume36
Issue number1
DOIs
StatePublished - Jan 1 2011

Fingerprint

Malvaceae
growth form
Phylogeny
phylogeny
shrub
shrubs
lianas
Growth
biogeography
Radiation
climbing plant
Ecosystem
common ancestry
chloroplast DNA
vines
tropics
ancestry
sampling
habitat
habitats

Keywords

  • Biogeography
  • Byttnerieae
  • Byttnerioideae
  • cpDNA
  • Lianas
  • Tropical plants

ASJC Scopus subject areas

  • Plant Science
  • Ecology, Evolution, Behavior and Systematics
  • Genetics

Cite this

The phylogeny of Ayenia, Byttneria, and Rayleya (Malvaceae s. l.) and its implications for the evolution of growth forms. / Whitlock, Barbara A; Hale, Amanda M.

In: Systematic Botany, Vol. 36, No. 1, 01.01.2011, p. 129-136.

Research output: Contribution to journalArticle

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