Why biosynthetic genes for chemical defense compounds cluster.

  title={Why biosynthetic genes for chemical defense compounds cluster.},
  author={Adam M. Takos and Fred Rook},
  journal={Trends in plant science},
  volume={17 7},
In plants, the genomic clustering of non-homologous genes for the biosynthesis of chemical defense compounds is an emerging theme. Gene clustering is also observed for polymorphic sexual traits under balancing selection, and examples in plants are self-incompatibility and floral dimorphy. The chemical defense pathways organized as gene clusters are self-contained biosynthetic modules under opposing selection pressures and adaptive polymorphisms, often the presence or absence of a functional… CONTINUE READING
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