منابع مشابه
The Geotropic Response in Asterina
Upon a surface inclined at angle alpha Asterina gibbosa orients upward during negatively geotropic creeping until the average angle (theta) of the path is such that Delta sin theta/Delta sin alpha = const. This is true also in positively geotropic movement. The direction of orientation may be temporarily reversed by mechanical disturbance. The variation of theta is greater at low slopes. Tests ...
متن کاملRed Light and the Geotropic Response of the Avena Coleoptile.
rung auf den. Wuchsstoffgehalt, das Langenwachstum und die geotropische Krimmungsfahigkeit von Helianthus hypokotylen. Planta 60: 109-30. 3. BRAY, G. A. 1960. A simple efficient liquid scintillator for counting aqueous solutions in a liquid scintillation counter. Anal. Biochem. 1: 279-85. 4. DIJKMNAN, M. J. 1934. Wuchsstoff und geotrop)ische Kriimmung bei Lupinus. Rec. tray, bot. n~erland. 31: ...
متن کاملGeotropic Response of Wheat Coleoptiles in Absence of Amyloplast Starch
Young coleoptiles of wheat (Triticum durum var. Henry), depleted of amyloplast starch by incubation at 30 degrees C with gibberellin plus kinetin, retained their geotropic responsiveness. Depleted coleoptiles curved upward more slowly than controls, but this was commensurate with their slower growth. The ratio of curvature to growth was about 50 degrees per mm of elongation in both cases. Newly...
متن کاملGeotropic Excitation in Helix
Rotation of an inclined surface on which Helix is creeping straight upward, such that the axis of the animal is turned at a right angle to its previous position, but in the same plane, leads to negatively geotropic orientation after a measurable latent period or reaction time. The duration of the latent period is a function of the slope of the surface. The magnitude of the standard deviation of...
متن کاملGeotropic Response of Coleoptiles under Anaerobic Conditions ' Malcolm B . Wilkins
It has been reported recently that coleoptiles of Zea mays develop a geotropic response under anaerobic conditions (2). The geotropic response of a coleoptile arises from the differential growth of the upper and lower halves of the organ. At least 3 independent investigations have shown that in Avena sativa coleoptiles growth is totally arrested in the absence of 02 (1,6, 9). It is therefore di...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1935
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.18.5.729