The movements of pulvinated cotyledons are generally larger in extent than those without a pulvinus; nevertheless some of the latter moved through an angle of 90o.
Pulvinated cotyledons, on the other hand, continue to rise at night for a much longer period, even for more than a month, as we shall now show.
Defn: Curved convexly or swelled; as, a pulvinated frieze.
For example, one immediately notes the mutulary Doric cornice and frieze along the sides, and the pulvinated Ionic entablature across the chancel gable above the Palladian window.
The first floor hall at Mount Pleasant presents the interesting combination of a pulvinated Ionic pediment with a mutulary Doric cornice and frieze about the ceiling.
The investigation has to include the effects exhibited not merely by the pulvinated but also by growing organs.
Time relations of response, the latent period, the apex time, and the period of recovery are of similar order inpulvinated and in growing organs.
From the results given in course of the Paper we are able to formulate the following laws about the effects of Direct and Indirect Stimulus on pulvinated organs:-- 1.
The similarity of contractile responses in growing and pulvinated organs.
And in this connection nothing could be more significant than the discriminative manner in which both the pulvinated and the growing organs respond to certain lights and not to others.
Different modes of electric stimulation act similarly on both growing and pulvinated organs.
In experiments with different pulvinated organs, great difference is noticed as regards their excitability.
It is therefore rational to seek for an explanation of a particular movement in a growing organ from ascertained facts relating to the corresponding movement in a pulvinated organ.
A tabular statement of contractile response of various radial, anisotropic and pulvinated organs will show a continuity in the contractile reaction; the difference exhibited is a question of degree and not of kind.
These effects of indirect stimulation have been fully demonstrated in the case of pulvinated organs (p.
A motile organ, including both the pulvinated and growing, will exhibit no geotropic effect on account of the depression of the power of perception through seasonal or other changes, or in the entire absence of the perceptive organ.
Repeated responses may thus be obtained similar to repeated responses in pulvinated organs.
Pulvinated organs, generally speaking, exhibit a diurnal variation of turgor in consequence of which the position of equilibrium of the leaf or leaflet undergoes a periodic change.
The results of investigations already described, enable us to formulate the general laws of tropic curvature applicable to all forms of stimuli, and to all types of responding organs, pulvinated or growing.
Before describing the effect of unilateral application of an electrical current in inducing tropic curvature, I shall give an account of the polar effect of anode and cathode on the pulvinated and growing organs.
An arbitrary distinction has been made between the responses of pulvinated and of growing organs.
The experimental investigation on the tropic effect of light may therefore be carried out both with pulvinated and growing organs.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pulvinated" in a variety of sentences. We hope that you will now be able to make sentences using this word.
