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Asymmetric distribution of glucose and indole-3-acetyl-myo-inositol in geostimulated Zea mays seedlingsIndole-3-acetyl-myo-inositol occurs in both the kernel and vegetative shoot of germinating Zea mays seedlings. The effect of a gravitational stimulus on the transport of [3H]-5-indole-3-acetyl-myo-inositol and [U-14C]-D-glucose from the kernel to the seedling shoot was studied. Both labeled glucose and labeled indole-3-acetyl-myo-inositol become asymmetrically distributed in the mesocotyl cortex of the shoot with more radioactivity occurring in the bottom half of a horizontally placed seedling. Asymmetric distribution of [3H]indole-3-acetic acid, derived from the applied [3H]indole-3-acetyl-myo-inositol, occurred more rapidly than distribution of total 3H-radioactivity. These findings demonstrate that the gravitational stimulus can induce an asymmetric distribution of substances being transported from kernel to shoot. They also indicate that, in addition to the transport asymmetry, gravity affects the steady state amount of indole-3-acetic acid derived from indole-3-acetyl-myo-inositol.
Document ID
20040090282
Document Type
Reprint (Version printed in journal)
Authors
Momonoki, Y. S. (Michigan State University East Lansing 48824-1312, United States)
Bandurski, R. S.
Date Acquired
August 21, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Plant physiology
Volume: 87
ISSN: 0032-0889
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: PCM 82-04017
CONTRACT_GRANT: NAGW-97
CONTRACT_GRANT: ORD 25796
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Number 40-10
NASA Discipline Plant Biology
Non-NASA Center
NASA Program Space Biology