The origin and evolution of lignin biosynthesis.

@article{Weng2010TheOA,
  title={The origin and evolution of lignin biosynthesis.},
  author={Jing‐Ke Weng and Clint Chapple},
  journal={The New phytologist},
  year={2010},
  volume={187 2},
  pages={
          273-85
        }
}
SUMMARY Lignin, a phenolic polymer derived mainly from hydroxycinnamyl alcohols, is ubiquitously present in tracheophytes. The development of lignin biosynthesis has been considered to be one of the key factors that allowed land plants to flourish in terrestrial ecosystems. Lignin provides structural rigidity for tracheophytes to stand upright, and strengthens the cell wall of their water-conducting tracheary elements to withstand the negative pressure generated during transpiration. In this… 

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