Physics
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996adspr..18..255t&link_type=abstract
Advance in Space Research, Volume 18, Issue 4-5, p. 255-258.
Physics
1
Scientific paper
An axis clinostat was constructed to create micro and negative gravity also a rotated flat disk was constructed with different rotation rates to give increased gravity, by centrifugal force up to 48g. Rice seeds were grown on agar in tubes at the constant air temperature of 20 degC under an average light condition of 110 mumol/m^2/sec(PPF). Humidity was not controlled but was maintained above 90%. Since the tube containers were not large enough for long cultivation, shoot and root growth were observed every 12 hours until the sixth day from seeding. The lengths of shoots and roots for each individual plant were measured on the last day. The stem lengths were increased by microgravity but the root lengths were not. Under the negative gravity, negative orthogeotropism and under micro gravity, diageotropism was observed. No significant effect of increased gravity was observed on shoot and root growth.
Goto E.
Takakura Tastuo
Tanaka Masao
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