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Response of Crown Gall Tissue to the Space Environment: Tumor Development and Anatomy (COS 782-1)
Principal Investigator
Research Area:
Plant biology
Species Studied
Scientific Name: Daucus carota Species: Carrot


The crown system has been suggested as a model to study the long-term effects of weightlessness on biological systems. Earlier studies show that tumors induced by inoculating cut surfaces of carrot disks with bacterium cells were significantly larger when gravity compensated on clinostats than those developed at 1 g. This study compared tumors developed in the space environment with Earth-based controls.

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Baker, R. et al.: Responses of Crown Gall Tissue to the Space Environment: Tumor Development and Anatomy. Final Reports of U.S. Experiments Flown on the Soviet Satellite Cosmos 782. S.N. Rosenzweig and K.A. Souza, eds., NASA TM-78525, 1978, pp. 45-57.

Kleinschuster, W.A. et al.: Responses of Crown Gall Tissue to Gravity Compensation. Phytopathology, vol. 65, 1975, pp. 931-935.

Wells, T.R. and R. Baker: Gravity Compensation and Crown Gall Development. Nature, vol. 223, 1969, pp. 734-735.

Agrobacterium tumefaciens
Plant tumors

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.

Damage, Developmental abnormalities, carrot tumor (Agrobacterium tumefaciens induced), Microscopy
Damage, Developmental abnormalities, wheat, plant, Microscopy
Growth, rate, Crown gall tumor, carrot, Weight, histology
Morphology, Carrot gall tumor, plant, Microscopy (descriptive)
Morphology, Meristematic ring, carrot gall tumor, plant, Microscopy (radius, CGS)
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Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Cosmos 782 11/25/1975 12/15/1975 20 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