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Effects of Temperature on the Dual Rhythmicity of Growth Rate in the Rice Embryo

Yasuo Nagato
Botanical Gazette
Vol. 146, No. 3 (Sep., 1985), pp. 341-346
Stable URL: http://www.jstor.org/stable/2474539
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effects of Temperature on the Dual Rhythmicity of Growth Rate in the Rice Embryo
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Abstract

Effects of temperature on the dual rhythmicity of the growth rate in the rice embryo were examined. At constant 20 C the periods of both rhythms of growth rate were longer than at ca. 29.3 C in a glasshouse. Although the periods were altered by temperatures, the number of cells at the onset of both rhythms was not affected. The dual rhythmicity started at the ca. 100-cell stage in the embryo at each temperature. The stability of the number of cells at the start of the rhythms indicates that the appearance of a dual rhythmicity is essential for embryonic development.

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