Brachytic2/ZmABCB1 functions in IAA export from intercalary meristems

  title={Brachytic2/ZmABCB1 functions in IAA export from intercalary meristems},
  author={Anne Sophie Kn{\"o}ller and Joshua J. Blakeslee and Elizabeth L. Richards and Wendy Ann Peer and Angus S Murphy},
  booktitle={Journal of experimental botany},
Dwarfism traits in Zea mays are regulated by multiple factors including the hormone auxin. Dwarf brachytic2 (br2) mutants harbour lesions in the gene encoding an orthologue of Arabidopsis thaliana ABCB1 which functions in auxin efflux out of meristematic regions in the shoot and root. br2 mesocotyls and coleoptiles exhibit reduced auxin transport. However, the dwarf stature of br2 derives from shortened lower internodes whilst the upper portion of the plant is completely normal. As such, it is… CONTINUE READING
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