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The diageotropica mutant of tomato lacks high specific activity auxin binding sitesTomato 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, labeling is indistinguishable from that in VFN8. These data suggest that the two polypeptides are part of a physiologically important auxin receptor system, which is altered in a tissue-specific manner in the mutant.
Document ID
20040090424
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Hicks, G. R.
(Oregon State University Corvallis 97331-2902)
Rayle, D. L.
Lomax, T. L.
Date Acquired
August 21, 2013
Publication Date
July 7, 1989
Publication Information
Publication: Science
Volume: 245
ISSN: 0036-8075
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-230
CONTRACT_GRANT: NAGW-1253
CONTRACT_GRANT: DCB-8718731
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Number 29-20
NASA Program Space Biology
Non-NASA Center
NASA Discipline Plant Biology

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