Word: heteroauxin
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Growth hormones have been discovered in plants. The major ones are "Auxin A," "Auxin B" and "Heteroauxin." Academic research on plant-growth hormones, mainly done within the past decade, has plowed its ground so well that commercial hormone preparations are now available to nurserymen to stimulate root growth in cuttings...
...method is called parthenocarpy (Greek parthenos, virgin; carpos, fruit). The chemical is indoleacetic acid, or heteroauxin, a famed plant hormone which has been used to stimulate root-sprouting and growth (TIME, Oct.11). Heteroauxin can be made synthetically at a cost of about $3 per ounce. One ounce in very dilute solution is enough to treat hundreds of plants. At the Department of Agriculture's experiment station in Beltsville, Md., Frank Easter Gardner and Ezra Jacob Kraus of the University of Chicago sprayed holly blooms with heteroauxin, obtained berries. These parthenocarpic fruits contained no trace of embryo, but the plant...
Colchicine. The major plant hormones already known are Auxins A and B and heteroauxin (TIME, Oct.11). Dr. Albert Francis Blakeslee, distinguished geneticist of the Carnegie Institution, reported discovery of a new plant hormone which he calls colchicine. It increases the growth rate of tobacco, phlox, onions, pumpkins, cosmos, radishes, portulaca, digitalis, jimson weed. The growth acceleration seems to be related to a doubling of certain segments of the chromosomes, heredity carriers in the germplasm. Colchicine also renders hybrid plants-which are normally sterile-fertile. Dr. Blakeslee pointed out that this action is as important in plant science as it would...
...distinguished father, got enough of one auxin in high concentration to measure its molecular weight. Three years later Kögl and his associates identified an auxin in urine, isolated it in pure form. This is called Auxin A. In 1934 the Utrecht researchers followed with Auxin B and heteroauxin. Heteroauxin has the astonishing effect of making roots sprout from the stem in shaggy masses like beards. It also produces elongation and swelling in stems, stimulates normal root formation, inhibits buds...
...Boyce Thompson Institute for Plant Research investigators had been observing the effect on plants of certain gases such as ethylene, acetylene, carbon monoxide. These effects in some ways were similar to those produced by the plant hormones. Eastman Kodak Co. was selling a near chemical kin of heteroauxin-indole-3n-propionic acid. The Boyce Thompson chemist thought he might be able to convert one to the other. Before he started, however, Drs. P. W. Zimmerman and A. E. Hitchcock tried out the indole-3n-propionic acid itself. To their unbounded delight, it produced nearly the same phenomena as a plant...