Metabolic fate of herbicides in plants /

Swanson, Charles R.

doi:10.5962/bhl.title.70295

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…Tolerance studies and extraction analyses in corn {^ea mays L.) pro\ide evidence of a direct relationship between tolerance and the degree of simazine metabolism (Montgomery & Freed, 1964). The main pathway in this metabolism is found to be a hydrolysis of simazine by which the non-toxic hydroxysimazine is formed (Swanson, 1965). This hydrolysis is considered to be noncnzytnatic (Muller & Payot, 1966), and catalysed by the plant constituent 2,4-dibydroxy-7-methoxy-I,4-benzoxazine-3-one (benzoxazinone) or its glucoside (Hamilton, 1964).…”

Section: Simazine Metabolismmentioning

confidence: 99%

UPTAKE, TRANSLOCATION AND METABOLISM OF SIMAZINE IN NORWAY SPRUCE (PICEA ABIES)

Lund‐Höie¹

1969

Weed Research

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Summary. Uptake, distribution and fate simazine (2‐chioro‐4,6‐biserthylamino‐s‐triazine) in 4‐year‐old seedlings of Norway spruce (Picea abies) are discussed. Simazine was found to be readily absorbed and distributed in the spruce seedlings. A positive relationship between the amount of simazine absorbed and the growth intensities of the plants indicates an active mechanism of uptake. A fixation of simazine in roots and sterm was observed. Simazine was degraded by roots and stem to hydroxysimazine and two other unknown metabolites. No simazine and only metabolites could be traced in the needles, indicating a very rapid rate of metabolism in the root system. The glucose derivative of benzoxazinone was extracted from all parts of the spruce seedlings and is probably responsible for the hydrolysis of simazine. The results indicate a very slow degradation of the metabolites to CO2 as one of the final products.

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Section: Simazine Metabolismmentioning

confidence: 99%

UPTAKE, TRANSLOCATION AND METABOLISM OF SIMAZINE IN NORWAY SPRUCE (PICEA ABIES)

Lund‐Höie¹

1969

Weed Research

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“…Crafts and Yamaguchi (10) showed that foliarly-applied 2,4-D is accumulated by living leaf cells, thus restricting translocation and limiting the amount that moves from the leaves to stems and roots. Swanson (24) quoted work of several workers which shows that 2,4-D forms complexes with sugars, amino acids, and proteins as well as forming several unknown complexes. These complexes are possible means by which 2,4-D translocation is restricted.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Metabolic Inhibitors on Herbicide Movement in Plants

Taylor¹,

Warren²

1970

Weed sci.

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Pretreatment of bean (Phaseolus vulgarisL.) petiole sections with one of several metabolic inhibitors greatly stimulated the movement of 3-amino-2,5-dichlorobenzoic acid (amiben) and (2,4-dichlorophenoxy)acetic acid (2,4-D). However, the movement of 3-amino-s-triazole (amitrole), 3-(3,4-dichlorophenyl)-1-methylurea (linuron), and isopropylm-chlorocarbanilate (chlorpropham) was stimulated only slightly or not at all. The basipetal movement of indole-3-acetic acid (IAA) was inhibited by concentrations of 2-sec-butyl-4,6-dinitrophenol (dinoseb) which stimulated respiration (5 × 10−7M to 5 × 10−8M). Acropetal movement was stimulated by dinoseb concentrations greater than 10−5M. Translocation of root-applied amiben and 2,4-D to the stems and leaves of whole plants of bean, squash (Curcurbita pepoL.), and cucumber (Cucumis sativusL.) was stimulated by dinoseb root applications only at concentrations which were highly injurious to the plants. Amiben, 2,4-D, and their metabolites were extracted from dinosebtreated and untreated tissues. The stem exudate from cucumber plants fed amiben and 2,4-D via the roots contained primarily the parent compounds, which indicates that the parent compounds are the primary components translocated through the xylem.

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“…Six years after stem injection 2,4-D was still present in high concentration in the wood near the incision. These findings seem to be contradictory to the general belief that 2,4-D is metabolized to inactive compounds in plant tissues in a few days or weeks (Swanson, 1965). However, in the literature there are several reports on a relatively long persistence of 2,4-D in certain plant tissues.…”

Section: Discussionmentioning

confidence: 73%

“…While 2,4-D is said to disappear in a few days or weeks in the tissues of certain species (Swanson, 1965), appreciable amounts of 2,4-D were found in the dead tissues of sprayed aspen a year after treatment. A factor of importance may be the fact that the plants in the experiment described in Table 1 were kept protected against rain all the time after treatment.…”

Section: Leaf-spraying Experimentsmentioning

confidence: 99%

TRANSLOCATION AND PERSISTENCE OF 2,4‐D IN POPULUS TREMULA L.

Eliasson

1973

Weed Research

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Treatment of aspen [Populus tremula L.) with 2,4-dichIorophenoxyacetic acid (2,4-D), using a leaf spray, basal bark spray or a stem injection method of application, resulted in some reduction of stump regrowth although downward translocation of 2,4-D was slight. Persistence of 2,4-D in dead leaf tissue and in woody tissue near the injection sites was observed. This persistence could in certain circumstances be noted 6 years after treatment. Migration et persistance du 2,4-D chez Populus tremula L. Resume. Le traitement du tremble {Populus tremula L.) avec de I'acide 2,4-dichIoroph^n-oxyac^tique (2,4-D) appliqu6 soit en pulverisation foliaire, en pulverisation sur l'^corce basale ou en injection dans les tiges provoque une reduction des repousses k partir de la souche, bien que la migration du 2,4-D vers le bas soit faible. La persistance du 2,4-D dans les tissus des feuilles mortes et dans le tissu ligneux au voisinage des lieux d'injection a €x.€ observ6e. Cette persistance peut etre, dans certain cas, constat^e six ann^es apres le traitement. Translokation und Persistenz von 2,4-D in Populus tremula L. Zusammenfassung. Die Behandlung von Espe {Populus tremula L.) mit 2,4-Dichlorphenoxyessigsaure (2,4-D) in Form einer Blattspritzung, der unteren Rindenpartien oder mittels Stamminjektion hatte eine gewisse Reduktion des Stockausschlags zur Folge, wenngleich die Translokation von 2,4-D nach unten gering war. 2,4-D war im Gewebe von totem Laub und im Holzgewebe nahe der Injektionsstellen persistent. Diese Persistenz konnte unter bestimmten Umstanden sechs Jahre nach der Behandlung beobachtet werden.• Present address:

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Metabolic fate of herbicides in plants /

Cited by 5 publications

References 23 publications

UPTAKE, TRANSLOCATION AND METABOLISM OF SIMAZINE IN NORWAY SPRUCE (PICEA ABIES)

UPTAKE, TRANSLOCATION AND METABOLISM OF SIMAZINE IN NORWAY SPRUCE (PICEA ABIES)

The Effect of Metabolic Inhibitors on Herbicide Movement in Plants

TRANSLOCATION AND PERSISTENCE OF 2,4‐D IN POPULUS TREMULA L.

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