The diageotropica mutant of tomato lacks high specific activity auxin binding sites.

@article{Hicks1989TheDM,
  title={The diageotropica mutant of tomato lacks high specific activity auxin binding sites.},
  author={Glenn R Hicks and David L. Rayle and Terri L. Lomax},
  journal={Science},
  year={1989},
  volume={245},
  pages={52-4}
}
Tomato plants homozygous for the diageotropica (dgt) mutation exhibit morphological and physiological abnormalities which suggest that they are unable to respond to the plant growth hormone auxin (indole-3-acetic acid). The photoaffinity auxin analog [3H]5N3-IAA specifically labels a polypeptide doublet of 40 and 42 kilodaltons in membrane preparations from stems of the parental variety, VFN8, but not from stems of plants containing the dgt mutation. In roots of the mutant plants, however… CONTINUE READING

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