Formative Effect of High and Low Temperatures Upon Growth of Barley: A Dissertation (Classic Reprint) - Hardcover
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Excerpt from Formative Effect of High and Low Temperatures Upon Growth of Barley: A Dissertation
Gutzeit (5) repeated aderhold's work and found by a rather extensive set of experiments that exposures to temperatures below zero had no effect on stem or shoot production in kohlrabi, beets, or various other plants. He did find, however, that a period at +4° C. During germination and early growth caused about 30 per cent Of Certain beets to produce shoots very early the first year. Some of the shoots produced only very short stems, and the plants were otherwise normal, while other shoots grew continuously and early produced flowers and seeds. Beets of exactly the same kind when kept at 22° C. During germination and early growth showed no shoot production the first year. Only such beets as were pre disposed to early shoot production could be thus forced by low temperatures, so hereditary characters as well as temperature enter in as determining factors. Gutzeit suggests that this temperature response? Explains Why early seeding of beets causes much premature shoot production, whereas late seeding gives little or none. On the basis of other experiments Conducted by himself, as well as data from the literature, gutzeit concludes that low temperatures during germination and early growth favor stem formation, while high temperatures at this time inhibit stern formation.
Appel and gassner (2) noted in the experimental fields of summer cereals at the Agricultural Experiment Station at Dahlem, Germany, a peculiar sickness, the plants becoming light green, and the older leaves turning yellow. Since neither animal nor plant pests seemed to be attacking the cereals, an explanation for their condition was sought in unfavorable soil and weather relations. Greenhouse experiments conducted by appel and gassner led them to attribute the peculiar conditions of these summer cereals to a too high germination temperature.
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