Further Evidence of Persistence Of the 2,4-D Stimulus in Cotton.

Although several reports in the literature indicate that 2,4-dichlorophenoxyacetic acid (2,4-D) or the stimulus therefrom does not normally persist in plants (3, 4, 5, 6,15), it has been demonstrated by the authors that cotton is an exception to this generalization (8,11,13). This fact became apparent upon demonstration of a transmission of the stimulus into seed embryos formed subsequent to 2,4-D application. In studies (7,11,12) dealing with the effects of 2,4-D on the vegetative characters of the cotton plant, it appears that persistence is also shown. This paper deals with further experiments designed to show the continuing activity of 2,4-D in vegetative organs of the cotton plant as evidenced by (a) malformation and (b) recovery of the growth substance.

[1]  W. J. Mcilrath,et al.  Developmental Stages of the Cotton Plant as Related to the Effects of 2,4-D , 1953, Botanical Gazette.

[2]  A. J. Eames.  A correlation of severity of 2,4-D injury with stage of ontogeny in monocot stems. , 1951, Science.

[3]  W. J. Mcilrath.  Cotton-Leaf Malformations Induced by Organic Phosphate Insecticides , 1950, Botanical Gazette.

[4]  H. Tukey.  On the persistence of 2,4-D in plant tissue. , 1950, Science.

[5]  J. W. Brown,et al.  Recovery of growth regulator from plants treated with 2,4-dichlorophenoxyacetic acid. , 1950, Science.

[6]  Daniel F. Burton.  Anatomy of the Cotton Leaf and Effects Induced by 2,4-Dichlorophenoxyacetic Acid , 1950, Botanical Gazette.

[7]  W. Davis,et al.  Persistence of 2,4-D in plant tissues. , 1950, Science.

[8]  A. J. Eames.  COMPARATIVE EFFECTS OF SPRAY TREATMENTS WITH GROWTH–REGULATING SUBSTANCES ON THE NUT GRASS, CYPERUS ROTUNDUS L., AND ANATOMICAL MODIFICATIONS FOLLOWING TREATMENT WITH BUTYL 2,4–DICHLOROPHENOXYACETATE , 1949 .

[9]  A. J. Eames.  Histological Effects of Treatments with Growth-regulating Substances of the 2,4-D Group. , 1949, Science.

[10]  A. A. Dunlap,et al.  Responses of Cotton to 2,4-D. , 1949 .

[11]  D. P. Watson.  AN ANATOMICAL STUDY OF THE MODIFICATION OF BEAN LEAVES AS A RESULT OF TREATMENT WITH 2,4‐D , 1948 .

[12]  E. L. Rice.  Absorption and Translocation of Ammonium 2,4-Dichlorophenoxyacetate by Bean Plants , 1948, Botanical Gazette.

[13]  U. R. Gore.  Morphogenetic Studies on the Inflorescence of Cotton , 1935, Botanical Gazette.