Diversity, distribution, development, and evolution of medullary bundles in Nyctaginaceae.

  title={Diversity, distribution, development, and evolution of medullary bundles in Nyctaginaceae.},
  author={Israel L da Cunha Neto and Marcelo R. Pace and Norman A. Douglas and Michael H. Nee and Cyl Farney C de S{\'a} and Michael J. Moore and Veronica Angyalossy},
  journal={American journal of botany},
PREMISE Medullary bundles, i.e., vascular units in the pith, have evolved multiple times in vascular plants. However, no study has ever explored their anatomical diversity and evolution within a phylogenetic framework. Here, we investigated the development of the primary vascular system within Nyctaginaceae showing how medullary bundles diversified within the family. METHODS Development of 62 species from 25 of the 31 genera of Nyctaginaceae in stem samples was thoroughly studied with light… 
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