. Principles of modern biology. Biology. 262 - Multicellular Plants. Fig. 14-3. Sleep movements in Oxa/is stricta. Left, doy position of leaflets; right, night position of leaflets. Another example of turgor movement. Holland and the United States, the nature growth substances began to become clearer. The early experiments showed that replacing the decapitated tip of meristem tissue re- stores the growth of the cells of the stump. Moreover, Went found that this effect was still obtained even when a fairly thick (2 mm) layer of agar was interposed between the cut surfaces, which proved that som
. Principles of modern biology. Biology. 262 - Multicellular Plants. Fig. 14-3. Sleep movements in Oxa/is stricta. Left, doy position of leaflets; right, night position of leaflets. Another example of turgor movement. Holland and the United States, the nature growth substances began to become clearer. The early experiments showed that replacing the decapitated tip of meristem tissue re- stores the growth of the cells of the stump. Moreover, Went found that this effect was still obtained even when a fairly thick (2 mm) layer of agar was interposed between the cut surfaces, which proved that some diffusible substance—rather than a wave of excitation —is responsible for the growth effect. Phytohormones, Especially the Auxins. Since these early experiments, three natural growth substances, or auxins, have been identified; and a variety of synthetic prod-. 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 Marsland, Douglas, 1899-. New York, Holt, Rinehart and Winston
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