. Absorption and excretion of salts by roots, as influenced by concentration and composition of culture solutions. Roots (Botany); Peas. 28 ABSORPTION AND EXCRETION OF SALTS BY ROOTS. entirely overcomes the harmful effect on root growth of magnesium alone. The duration of cultures was eight days; temperature at the beginning °, at the end °. The influence of calcium on root development in the cultures of this series was extremely interesting. In experiment C, as in experi- ment 5, calcium nitrate was substituted for magnesium nitrate by increments of a hundredth of the total salt conce
. Absorption and excretion of salts by roots, as influenced by concentration and composition of culture solutions. Roots (Botany); Peas. 28 ABSORPTION AND EXCRETION OF SALTS BY ROOTS. entirely overcomes the harmful effect on root growth of magnesium alone. The duration of cultures was eight days; temperature at the beginning °, at the end °. The influence of calcium on root development in the cultures of this series was extremely interesting. In experiment C, as in experi- ment 5, calcium nitrate was substituted for magnesium nitrate by increments of a hundredth of the total salt concentration of the solution. In the former case, however, the salt concentration was. Fig. 16.—Seedlings of culture 14, experiment 3. such that magnesium nitrate alone killed the roots, whereas in the latter case it was such that magnesium nitrate alone retarded the growth of lateral roots and did not kill the primary. In experiment C the lateral roots did not attain as perfect a development as in dis- 92 tilled water until the ratio of magnesium to calcium reached -^-. In experiment 5, on the other hand, the first increment of calcium 99 (making the ratio of magnesium to calcium -=-) permitted laterals to develop as well as in distilled water. The concentration of calcium 231. 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 True, Rodney H. (Rodney Howard), 1866-1940; Bartlett, Harley Harris, 1886-1960; United States. Bureau of Plant Industry. Washington, D. C. : Government Printing Office
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrootsbo, bookyear1912
