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Long-Term Effects of Weightlessness on a Biological System (COS 1129-6)
Principal Investigators
Research Area:
Plant biology
Species Studied
Scientific Name: Daucus carota Species: Carrot


Plants orient to the direction of the gravitational field and contain supporting structures made necessary by the presence of gravity. Even so, only two gross responses of plants to gravity are known. The first is geotropism; the second is related to the increased metabolic activity associated with gravity compensation. This experiment undertook the development of a biological system with the capacity to investigate the long-term effects of weightlessness on plant metabolism, cellular and tissue morphology, and physiology.

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Baker, R. et al.: Long-Term Effects of Weightlessness on a Biological System. Final Report of U.S. Plant and Radiation Dosimetry Experiments Flown on the Soviet Satellite Cosmos 1129. M.R. Heinrich and K.A. Souza, eds., NASA TM-81288, 1981, pp. 29-44.

Growth and development
Plant tumors
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Data Information
Data Availability
Archive is complete. No data sets are available for this experiment. Please Contact LSDA if you know of available data for this investigation.

Activity, metabolism, Carbohydrate, crown gall tumor, carrot, Differential carbohydrate analysis
Content, Carbohydrate, crown gall tumor, carrot, Analysis
Damage, Developmental abnormalities, carrot tissue, plant, Microscopy
Growth, rate, Crown gall tumor, carrot, Weight, histology
Morphology, Carrot gall tumor, plant, Microscopy (descriptive)
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Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Cosmos 1129 09/25/1979 10/14/1979 19 days

Additional Information
Managing NASA Center
Ames Research Center (ARC)
Responsible NASA Representative
Ames Research Center LSDA Level 3
Project Manager: Sylvain Costes
Institutional Support
National Aeronautics and Space Administration (NASA)
Alternate Experiment Name
Protocol / Approach