Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 55 (1948) > Annual Issue
Document Type
Research
Abstract
Soon after the discovery and use of synthetic plant hormones it became apparent that the degree and type of response of plants treated with such hormones depend upon a number of factors. Individual plants of the same species may not react the same, even though subjected to similar environmental conditions. Early investigations were characterized by the use of very low concentrations and minute amounts of hormonal material in an attempt, primarily, to induce root formation (Zimmerman and Hitchcock, 1942). When the economic value of such compounds as herbicides was discovered it caused the investigators to shift attention to quantities and concentrations which were toxic. The responses of a large number of plants to toxic doses of such compounds have been reported. In view of the variable responses exhibited by plants of the same species to different concentrations of growth-regulating substances, it seems desirable to determine the pattern of responses to concentrations below or near the threshold of toxicity.
Publication Date
1948
Journal Title
Proceedings of the Iowa Academy of Science
Volume
55
Issue
1
First Page
205
Last Page
211
Copyright
©1948 Iowa Academy of Science, Inc.
Language
en
File Format
application/pdf
Recommended Citation
Postlethwait, S. N.
(1948)
"External Responses of Galinsoga Ciliata (Raf.) Blake to Treatment With Low Concentrations of 2,4-Dichlorophenoxyacetic Acid,"
Proceedings of the Iowa Academy of Science, 55(1), 205-211.
Available at:
https://scholarworks.uni.edu/pias/vol55/iss1/26