Algebraical summation of geotropic and phototropic effects: Experiment 194.
The procumbent stem curved up and attained a state of equilibrium under the action of geotropic stimulus.
Experiments will be described in a subsequent chapter which show that geotropic stimulus also induces similar torsional response.
geotropic response of flower stalk of Tuberose: Experiment 164.
The intensity of geotropic reaction is, moreover, modified by the excitability of the responding tissue.
According to this test, the geotropic response of the stem is positive.
Under symmetrical conditions, the intensity of geotropic reaction is found proportional to the sine of the angle of inclination.
This has even led to assumption that there are phototropic particles which function like statoliths in geotropic organs.
The geotropic curvature and torsion are increased by lowering of temperature, and decreased by rise of temperature.
The recorder shown in figure 157 is very convenient for study of geotropic movement.