Abstract
DURING a study of the inter-relationships between light intensity, temperature and the biological effects of 2 : 4 dichlorophenoxyacetic acid, it was found in the case of Lemna minor (duckweed) that when the concentration of the growth regulator in the external water culture solution was sufficiently high to kill some of the fronds at the end of three days exposure, then the mortality increased with decreasing light intensity over the range of continuous illumination 700–180 ft. candles. It was further observed that, whereas the degree of toxicity was markedly dependent on the light intensity received by the fronds prior to treatment with the dichlorophenoxyacetic acid (‘pre-treatment period’), yet similar variations in the intensity during the following short ‘treatment period’ of three days had no effect.
Similar content being viewed by others
Article PDF
References
Blackman, G. E., J. Exp. Bot., 3, 1 (1952).
Sampford, M. R., J. Exp. Bot., 3, 28 (1952).
Simon, E. W., Roberts, H. A., and Blackman, G. E., J. Exp. Bot., 3, 99 (1952).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
ROBERTSON-CUNINGHAME, R., BLACKMAN, G. Effects of Preliminary Treatment on the Subsequent Variation in the Resistance of Lemna minor to the Phytotoxic Action of 2 : 4 Dichlorophenoxyacetic Acid. Nature 170, 459 (1952). https://doi.org/10.1038/170459a0
Issue Date:
DOI: https://doi.org/10.1038/170459a0
This article is cited by
-
The Lemnaceae, or duckweeds
The Botanical Review (1961)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.