Translocation of Exogenous Growth-Regulators in the Bean Seedling

Weintraub, Robert L.; Brown, James W.

doi:10.1104/pp.25.1.140

Cited by 43 publications

(13 citation statements)

References 10 publications

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“…Splitting off of the side chain will in general lead to its oxidation. This probably accounts for the results of Weintraub and others which demonstrate that when 2,4-D with C14 in the side chain is given to plants, the C14 comes off in CO2 (7,15,26) or is converted into numerous compounds other than 2,4-D (14,15,16,28 THE AUXIN ASSAY: The slit-pea test is the most convenient assay for the 2,4-D extracted from treated plants, both becauise it is relatively quick and simple, and because it is highly sensitive to 2,4-D and much less so to indole-acetic acid (IAA). As noted above, the relative activity of 2,4-D is from 8 to 12 times that of IAA in this test (22).…”

supporting

confidence: 71%

“…The early methods which were widely used in studying the transport of 2,4-dichlorophenoxyacetic acid (2,4-D) in bean seedlings depended on the growth response of the plants after the application of the auxin (4,11,18,20,21,25,26). Most auxins when applied to the primary leaf of a bean seedling will cause curvature of the elongating epicotyl and will inhibit the development of the terminal bud.…”

mentioning

confidence: 99%

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The Fate of 2,4-Dichlorophenoxyacetic Acid in Bean Seedlings. I. Recovery of 2,4-Dichlorophenoxyacetic Acid and Its Breakdown in the Plant

Hay¹,

Thimann²

1956

Plant Physiol.

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confidence: 71%

mentioning

confidence: 99%

The Fate of 2,4-Dichlorophenoxyacetic Acid in Bean Seedlings. I. Recovery of 2,4-Dichlorophenoxyacetic Acid and Its Breakdown in the Plant

Hay¹,

Thimann²

1956

Plant Physiol.

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“…When bean seedlings were kept in the dark before and after the application of 2,4-D to the primary leaf, the growth response of the epicotyl was not observed. If, however, sugar was applied to the leaves with the 2,4-D the epicotyl did curve (15,20). Unfortunately the result is inconclusive, for while the sugar may indeed have brought about the translocation of the auxin, it could equallv well have exerted its effect by making it possible for the growth response to be exhibited.…”

mentioning

confidence: 86%

The Fate of 2,4-Dichlorophenoxyacetic Acid in Bean Seedlings. II. Translocation.

Hay¹,

Thimann²

1956

Plant Physiol.

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“…The report by WEINTRAUB and BROWN (6) that stem elongation of Phaseolus vulgaris var. Black Valentine was directly proportional, within the range of 0 to .75 M, to the concentration of sugar supplied to the leaves suggested that this relationship could be used as a basis of approach for studying the effect of temperature on translocation of carbohydrates.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Petiole Temperature on the Translocation of Carbohydrates From Bean Leaves

Swanson

Böhning

1951

Plant Physiol.

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The present controversial status of the problem of transport rate as related to temperature is briefly summarized in a recent paper by WENT and HULL (8). As pointed out by these authors, the reported Qlo values for translocation range from less than 1 (7,8), to essentially 1 (5), to values greater than 1 (3, 4).The effects of temperature are multiple and greatly complicate an analysis of this problem. It is to be expected, though little data exist for its substantiation, that the effect of temperature on rate of conduction of carbohydrate materials through petioles, will be influenced by temperature effects on numerous other processes occurring in various parts of the plant, such as respiration and assimilation, and the effect these processes have on concentration gradients between regions of export and import. Studies, therefore, in which the entire plant is subjected to different temperatures (4), although contributing much data of value, do not permit a clear analysis of the temperature effect on the process of translocation per se. In the present experiments, therefore, only the petiole temperature was varied, the rest of the plant in all treatments being maintained at a temperature of 20 ± 10 C. Materials and methodsThe report by WEINTRAUB and BROWN (6) that stem elongation of Phaseolus vulgaris var. Black Valentine was directly proportional, within the range of 0 to .75 M, to the concentration of sugar supplied to the leaves suggested that this relationship could be used as a basis of approach for studying the effect of temperature on translocation of carbohydrates. If temperature has an effect on the rate of movement of sugar through the petiole then the amount of sugar reaching the growing tip will vary with temperature and the rate of elongation should vary accordingly. Stem elongation may then be used as an index to the effect of temperature on translocation of sugar. The basic features of the method, therefore, consisted of jacketing the petiole of one primary leaf, immersing the blade in sugar solution and measuring the subsequent elongation of the plant occurring in the dark. Seeds of Phaseolus vulgaris, variety Burpee's Stringless Greenpod (in

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Translocation of Exogenous Growth-Regulators in the Bean Seedling

Cited by 43 publications

References 10 publications

The Fate of 2,4-Dichlorophenoxyacetic Acid in Bean Seedlings. I. Recovery of 2,4-Dichlorophenoxyacetic Acid and Its Breakdown in the Plant

The Fate of 2,4-Dichlorophenoxyacetic Acid in Bean Seedlings. I. Recovery of 2,4-Dichlorophenoxyacetic Acid and Its Breakdown in the Plant

The Fate of 2,4-Dichlorophenoxyacetic Acid in Bean Seedlings. II. Translocation.

The Effect of Petiole Temperature on the Translocation of Carbohydrates From Bean Leaves

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