What is "radicles"

Usage examples of "radicles".

Circumnutation was observed in the above specified cases, either by means of extremely fine filaments of glass affixed to the radicles in the manner previously described, or by their being allowed to grow downwards over inclined smoked glassplates, on which they left their tracks.

We next experimented on nearly a score of radicles by allowing them to grow downwards over inclined plates of smoked glass, in exactly the same manner as with Aesculus and Phaseolus.

Thin slips of wood were cemented on more or less steeply inclined glassplates, at right angles to the radicles which were gliding down them.

Manner in which radicles bend when they encounter an obstacle in the soil--Vicia faba, tips of radicles highly sensitive to contact and other irritants--Effects of too high a temperature--Power of discriminating between objects attached on opposite sides--Tips of secondary radicles sensitive--Pisum, tips of radicles sensitive--Effects of such sensitiveness in overcoming geotropism--Secondary radicles--Phaseolus, tips of radicles hardly sensitive to contact, but highly sensitive to caustic and to the removal of a slice--Tropaeolum--Gossypium--Cucurbita--Raphanus--Aesculus, tip not sensitive to slight contact, highly sensitive to caustic--Quercus, tip highly sensitive to contact--Power of discrimination--Zea, tip highly sensitive, secondary radicles--Sensitiveness of radicles to moist air--Summary of chapter.

All these observations are liable to several causes of error, but we believe, from what will hereafter be shown with respect to the movements of the radicles of other plants, that they may be largely trusted.

Even the stems of seedlings before they have broken through the ground, as well as their buried radicles, circumnutate, as far as the pressure of the surrounding earth permits.

The solution was allowed to evaporate, until it became so thick that it set hard in two or three seconds, and it never injured the tissues, even the tips of tender radicles, to which it was applied.

The tips of the radicles were placed so as just to touch the upper end of the glassplates, and, as they grew downwards they pressed lightly, owing to geotropism, on the smoked surfaces, and left tracks of their course.

Aesculus, and the tracks left by the tips of four radicles of the present plant, whilst growing downwards, were photographed as transparent objects.

In those cases in which radicles with attached filaments were placed so as to stand up almost vertically, they curved downwards through the action of geotropism, circumnutating at the same time, and their courses were consequently zigzag.

The petioles are clothed with roothairs like those on a true radicle, and they likewise resemble radicles in becoming brown when immersed in a solution of permanganate of potassium.

Secondly, with the radicles of seedlings, the tip is sensitive to various stimuli, especially to very slight pressure, and when thus excited, transmits an influence to the upper part, causing it to bend from the pressed side.

These radicles therefore were continually moving in all directions--that is, they circumnutated.

These radicles were so delicate that they rarely had the power to sweep the glasses quite clean.

This was shown by the tracks often being alternately a little broader and narrower, due to the radicles having alternately pressed with greater and less force on the plates.