The Podostemad Puzzle: The Evolution of Unusual Morphology in the Podostemaceae

@article{Eckardt2010ThePP,
  title={The Podostemad Puzzle: The Evolution of Unusual Morphology in the Podostemaceae},
  author={N. Eckardt and D. Baum},
  journal={Plant Cell},
  year={2010},
  volume={22},
  pages={2104 - 2104}
}
The family Podostemaceae is a family of aquatic eudicots known as river weeds that grow on rocks in rapids and waterfalls, mostly in tropical and subtropical regions. They have a unique body plan (see [figure][1]) that appears specialized for clinging to rocks in moving water. In the subfamily 
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Expression of SHOOT MERISTEMLESS, WUSCHEL, and ASYMMETRIC LEAVES1 Homologs in the Shoots of Podostemaceae: Implications for the Evolution of Novel Shoot Organogenesis[W]
TLDR
The results suggest that the leaf of Podostemoideae is initiated as a SAM and differentiates into a single apical leaf/bract, resulting in the evolution of novel shoot-leaf mixed organs in Podostemaceae. Expand
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Another aspect of KNOX1 regulation via a protein–protein interaction network involved in the natural variation in leaf shape could be utilized for fine-tuning leaf morphology during evolution without affecting the essential function of K NOX genes in the shoot. Expand