. The power of movement in plants . Plants; Botany. A. B. Pisutn sativum: deflection produced within 24 hours in the growth of vertically dependent radicles, by little squares of card afiixed with shellac to one side of apex : A, bent at right angles ; B, hooked. interval of 5 h. 30 m.; and we merely record in our notes " almost all bent slightly from the perpendicular, and away from the squares; the deflection amounting in one or two instances to nearly a ; These two sets of cases, especially the first one, prove that the apex of the radicle is sensitive to slight contact
. The power of movement in plants . Plants; Botany. A. B. Pisutn sativum: deflection produced within 24 hours in the growth of vertically dependent radicles, by little squares of card afiixed with shellac to one side of apex : A, bent at right angles ; B, hooked. interval of 5 h. 30 m.; and we merely record in our notes " almost all bent slightly from the perpendicular, and away from the squares; the deflection amounting in one or two instances to nearly a ; These two sets of cases, especially the first one, prove that the apex of the radicle is sensitive to slight contact and that the upper part bends from the touching object. Nevertheless, on June 1st and 4th, 8 other radicles were tried in the same manner at a tempera- ture of 58°-60° F., and after 24 h. only 1 was decidedly bent from the card, 4 slightly, 2 doubtfully, and 1 not in the least. The amount of curvature was unaccount- ably small; but all the radicles which were at all bent, were bent away from the cards. We now tried the effects of widely different tempera- tures on the sensitiveness of these radicles with squares. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925. New York : D. Appleton
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
