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The influence of gravity on the formation of amyloplasts in columella cells of Zea mays LColumella (i.e., putative graviperceptive) cells of Zea mays seedlings grown in the microgravity of outer space allocate significantly less volume to putative statoliths (amyloplasts) than do columella cells of Earth-grown seedlings. Amyloplasts of flight-grown seedlings are significantly smaller than those of ground controls, as is the average volume of individual starch grains. Similarly, the relative volume of starch in amyloplasts in columella cells of flight-grown seedlings is significantly less than that of Earth-grown seedlings. Microgravity does not significantly alter the volume of columella cells, the average number of amyloplasts per columella cell, or the number of starch grains per amyloplast. These results are discussed relative to the influence of gravity on cellular and organellar structure.
Document ID
20040089828
Document Type
Reprint (Version printed in journal)
Authors
Moore, R. (Baylor University Waco, Texas 76798, United States)
Fondren, W. M.
Koon, E. C.
Wang, C. L.
Date Acquired
August 21, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Plant physiology
Volume: 82
ISSN: 0032-0889
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Number 40-10
NASA Discipline Plant Biology
Flight Experiment
STS-61C Shuttle Project
NASA Program Space Biology
manned
Non-NASA Center
short duration