What is "apheliotropic"

Usage examples of "apheliotropic".

Phalaris, manner of bending--Results of the exclusion of light from their tips--Effects transmitted beneath the surface of the ground--Lateral illumination of the tip determines the direction of the curvature of the base--Cotyledons of Avena, curvature of basal part due to the illumination of upper part--Similar results with the hypocotyls of Brassica and Beta--Radicles of Sinapis apheliotropic, due to the sensitiveness of their tips--Concluding remarks and summary of chapter--Means by which circumnutation has been converted into heliotropism or apheliotropism.

Any kind of movement in relation to light will obviously be much facilitated by each part circumnutating or bending successively in all directions, so that an already existing movement has only to be increased in some one direction, and to be lessened or stopped in the other directions, in order that it should become heliotropic, apheliotropic, etc.

Both tracings showed that the apheliotropic movement was a modified form of circumnutation.

It appears, therefore, that light does not determine the growth of apheliotropic parts in any uniform manner.

Some tendrils which consist of modified leaves--organs in all ordinary cases strongly diaheliotropic--have been rendered apheliotropic, and their tips crawl into any dark crevice.

Wiesner were all apheliotropic, and this, no doubt, is of use in bringing them into contact with trunks of trees or surfaces of rock, as is their habit.

Of the 54 cauterised radicles one case was doubtful, 25 curved themselves from the light in the normal manner, and 28, or more than half, were not in the least apheliotropic.

Both tracings showed that the apheliotropic movement was a modified form of circumnutation.

Any kind of movement in relation to light will obviously be much facilitated by each part circumnutating or bending successively in all directions, so that an already existing movement has only to be increased in some one direction, and to be lessened or stopped in the other directions, in order that it should become heliotropic, apheliotropic, etc.

Bignonia capreolata: apheliotropic movement of a tendril, traced on a horizontal glass from 6.

Ivy and Tecoma radicans, are likewise apheliotropic, and they thus find a support.

It appears, therefore, that light does not determine the growth of apheliotropic parts in any uniform manner.

Dahlia, circumnutation of young leaves, 244246 Dalea alopecuroides, leaflets depressed at night, 354 Darkness, effect of, on the movement of leaves, 407 Darlingtonia Californica, its leaves or pitchers apheliotropic, 450, n.