You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effects of Indoleacetic Acid and Gibberellic Acid on Normal and Dwarf Tomatoes
T. H. Plummer and M. L. Tomes
Vol. 119, No. 3 (Mar., 1958), pp. 197-200
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/2473445
Page Count: 4
You can always find the topics here!Topics: Plants, Plant growth, Insulin antibodies, Seedlings, Auxins, Genotypes, Indoleacetic acids, Dwarfing, Corn, Seedling growth
Were these topics helpful?See something inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
1. Four normal tomato varieties and four dwarf strains homozygous for the genetic factor dd were studied. Indoleacetic acid (IAA) applied to the foliage of young plants gave no significant growth stimulation of either the normal or the dwarf type. When IAA was supplied to etiolated hypocotyl segments in straight growth tests, the only differential response was the greater sensitivity of one of the dwarf types. This sensitivity was not associated with the d locus. 2. Dwarf plants treated with gibberellic acid (GA) exceeded in height the untreated normal plants, but significant increases in growth occurred in all varieties treated, regardless of genotype. Two varieties, one dwarf and one normal, showed a significant sensitivity to GA at low concentrations which failed to stimulate the other varieties studied. 3. Light intensity was found to influence both the normal and the dwarf types similarly. In temperature studies the dwarf varieties appeared to be less responsive to temperature increases.
Botanical Gazette © 1958 The University of Chicago Press