Polyethylene Glycols as Carriers for Growth-Regulating Substances

@article{Mitchell1944PolyethyleneGA,
  title={Polyethylene Glycols as Carriers for Growth-Regulating Substances},
  author={John William Mitchell and Charles L. Hamner},
  journal={Botanical Gazette},
  year={1944},
  volume={105},
  pages={474 - 483}
}
1. Addition of Carbowax compounds to aqueous solutions of 2,4-dichlorophenoxyacetic acid increased the effectiveness of the acid in bringing about growth responses and form changes in kidney bean plants as measured on a quantitative basis. 2. Marked form changes occurred in roots, hypocotyl, first internode, and terminal and lateral buds as the result of application of 4 γ of the acid to one primary leaf of seedling bean plants. Application of 1 γ of the acid in a like manner resulted in… Expand
Observations on the Growth of Certain Plants in Nutrient Solutions Containing Synthetic Growth-Regulating Substances I. Some Effects of 2,4- Dichlorophenoxyacetic Acid
TLDR
Young vegetative red kidney bean, soybean, cowpea, wheat, and corn plants were grown for from 2 to 3 weeks in nutrient-solution cultures which contained various concentrations of 2,4-dichlorophenoxyacetic acid, a growth-regulator that proved toxic to all species tested, reducing or inhibiting growth and causing distinct morphological changes in these plants. Expand
Effects of Growth-regulating Substances on the Carbon Dioxide Evolution and Post-harvest Ripening of Tomatoes.
TLDR
Of the two widely studied growth regulators, 2,4-dichlorophenoxyacetic acid and 2,3,5-triiodobenzoic acid, only the latter was found to be capable of interference with the geotropic response. Expand
2,4-Dichlorophenoxyacetic Acid as a Differential Herbicide
1. 2,4-Dichlorophenoxyacetic acid was effective as a differential herbicide when applied as an aqueous spray in concentrations of from 250 to 1000 p.p.m. or more. 2. Plants killed by these spraysExpand
Plant-Growth Substances as Selective Weed-Killers: Differential Effect of Flant-Growth Substances on Plant Species
TLDR
It was found in August 1940 that applications at the rate of 25 lb. Expand
Effects of 2,4-Dichlorophenoxyacetic Acid on the Growth of Grass Plants
TLDR
The detrimental effects of the acid in the soil were only temporary, since redtop, fescue, and bluegrass seeds germinated and the seedlings became established in treated soil as readily as in untreated soil, when the seeds were planted 5 weeks after the soil was sprayed. Expand
Movement of 2,4-Dichlorophenoxyacetic Acid Stimulus and Its Relation to the Translocation of Organic Food Materials in Plants
TLDR
The stimulus resulting from treatment with 2,4-dichlorophenoxyacetic acid was not readily translocated from leaves of bean plants whose sugar content was relatively low, such as those exposed to extended periods of darkness or to CO2-free air in light. Expand
EFFECT OF 2,4-DICHLOROPHENOXYACETIC ACID ON THE CONTENT OF THIAMINE, RIBOFLAVIN, NICOTINIC ACID, PANTOTHENIC ACID AND CAROTENE IN STEMS AND LEAVES OF RED KIDNEY BEAN PLANTS.
Mitchell, Ezell and Wilcox (4) have shown that when snap bean fruits are sprayed with a water mixture of Tween 20 and p-chlorophenoxyacetic acid, the vitamin C content is increased during storage. ItExpand
The Response of Kidney-Bean and Soybean Plants to Aqueous-Spray Applications of 2,4-Dichlorophenoxyacetic Acid With and Without Carbowax
TLDR
The addition of any of three Carbowaxes to aqueous-spray solutions of 2,4-dichlorophenoxyacetic acid enhanced its activity in inhibiting growth of kidney-bean plants but did not aid in inducing inhibitory responses in soybean plants. Expand
CHANGES IN CHEMICAL COMPOSITION OF THE STEMS OF RED KIDNEY BEAN PLANTS TREATED WITH 2, 4-DICHLOROPHENOXYACETIC ACID.
TLDR
Chemical analyses for amino acids, ether extract, carbohydrates, ash and crude fiber are presented for the stems of untreated red kidney bean plants and for those treated with 2, 4-D. Expand
Relation of Temperature to the Selective Herbicidal Effects of 2,4- Dichlorophenoxyacetic Acid
TLDR
Field experiments have demonstrated that dormant Plantago lanceolata in frozen ground, having some living leaves, when treated with the acid or its sodium salt is killed when the plants are placed under temperature conditions favorable for growth. Expand
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