Divergent leaf shapes among Passiflora species arise from a shared juvenile morphology.

ABSTRACT: Not only does leaf shape vary between Passiflora species, but between sequential nodes of the vine. The profound changes in leaf shape within Passiflora vines reflect the temporal development of the shoot apical meristem from which leaves are derived and patterned, a phenomenon known as heteroblasty. We perform a morphometric analysis of more than 3,300 leaves from 40 different Passiflora species using two different methods: homologous landmarks and Elliptical Fourier Descriptors (EFDs). Changes in leaf shape across the vine are first quantified in allometric terms; that is, changes in the relative area of leaf subregions expressed in terms of overall leaf area. Shape is constrained to strict linear relationships as a function of size that vary between species. Statist

SUBMITTER: Chitwood DH 

PROVIDER: S-EPMC6508542 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature