The Translocation of 2,4-D-1-C[superscript fourteen] in Potamogeton pectinatus, a Submersed Aquatic Plant

Aldrich, F. D.; Otto, N. E.

doi:10.2307/4040337

Cited by 4 publications

(1 citation statement)

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“…A considerable amount of time was spent initially in constructing and testing chambers suitable for isolating root and shoot systems of intact hydrophytes. Several investigators have devised chambers for this purpose (Aldrich and Otto 1959, Funderburk and Lawrence 1963, Frank and Hodgson 1964, but each of their systems was tried and rejected as unacceptable for our purposes. · A method modified from Littlefield and Forsberg ( 1965) was finally used to isolate the root and shoot systems of our experimental plants for laboratory studies.…”

Section: Methodsmentioning

confidence: 99%

Studies of Absorption of 32P, 59FE, and 45CA by Water-Milfoil (Myriophyllum Exalbescens Fernald)

DeMarte¹,

Hartman²

1974

Ecology

102

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A method was developed for determining uptake and translocation of mineral elements by intact submersed aquatic vascular plants in laboratory and field studies. Autoradiographs and radioactivity measurements provided direct evidence that 32P, 59Fe, and 45Ca were absorbed by the roots of Myriophyllum exalbescens and translocated to the shoot tissues. Similar evidence was obtained for absorption of 32P by the shoots and translocation to the roots. Data from experiments designed to compare the effect of substrate type (sand or muck) and the presence or absence of light showed no significant difference in the amounts of 32P absorbed by roots. Translocation of 59Fe from root to shoot tissues occurred mainly when plants were rooted in muck. 45Ca translocation from roots to shoots was greatest for plants rooted in sand and maintained in the light. 32P was generally distributed throughout Myriophyllum as revealed by autoradiography, with some accumulation occurring at the nodal and building regions. 59Fe and 45Ca were not translocated as readily but some accumulation of each occurred in the stem. 32P absorbed by the roots of Myriophyllum was translocated to the shoot system and released to the surrounding water. Experimental evidence showed that injury to submersed hydrophytes can result in additional release of phosphate to the water. The rate of release is increased as a result of physical damage to the shoot. This provides an additional pathway for the cycling of phosphorus in freshwater environments.

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Section: Methodsmentioning

confidence: 99%

Studies of Absorption of 32P, 59FE, and 45CA by Water-Milfoil (Myriophyllum Exalbescens Fernald)

DeMarte¹,

Hartman²

1974

Ecology

102

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Absorption and Translocation of Radioactive Herbicides in Submersed and Emersed Aquatic Weeds*

Funderburk

Lawrence

1963

Weed Research

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Absorption and translocation of labelled herbicides by a submersed weed, waterstargrass [Heteranthera dubia (Jacq.) MacM.) were studied. Autoradiographs showed that simazine (or the labelled carbon atom) and 2,4-D-butoxyethyl ester moved both from roots to shoots and from shoots to roots. Ametryne, prometryne, fenac and 2,4-D (acid) moved to a slight extent from shoot to root, but no movement from root to shoot could be detected in the autoradiographs. However, counting data indicated that small amounts of these four compounds, not recorded on autoradiographs, may move from root to shoot. Radioassay did not detect diquat or paraquat movement to the roots or to the upper portions ofthe shoots, but the autoradiograph of one plant receiving a root application of paraquat showed slight movement into the lower portion ofthe stem.Absorption and translocation of labelled herbicides by an emersed weed, alligatorweed {Alternanthera philoxeroides (Mart.) Griseb.), were also studied. Darkening of film indicated that relative mobility of root-applied herbicides was as follows: ametryne = fenac = prometryne = simazine>diquat = paraquat>2,4-D (acid) = 2,4-D-butoxyethyl ester. There was little movement of foliage-applied simazine, ametryne and prometryne. There was slight downward movement of foliage-applied fenac, diquat and paraquat, and considerable downward movement of 2,4-D (acid) and 2,4-D-butoxyethyl ester, which accumulated in the nodal regions ofthe stem.Radiolabelled phosphorus moved in both directions in both plants and there was more movement in an upward direction in both species. Absorption et migration d'herbicides radio-actifs dans des mauvaises herbes aquatiques immerge'es et e'mergentesResume. L'absorption et la migration d'herbicides par une mauvaise herbe immergfe {Heteranthera dubia (Jacq.) MacM.) ont 6t6 dtudi^es au moyen de produits marquis. Les autoradiographies ont montr6 que la simazine (ou l'atome de carbone marqu^) et Tester butoxy6thylique du 2,4-D se diplayaient tous deux dans le sens racines-•feuilles et dans le sens feuilles->-racines. L'amitryne, la prometryne, le f^nac et le 2,4-D (acide) se d^placferent dans une faible mesure dans le sens feuilles->racines, mais aucun mouvement dans le sens racines-)-feuilles ne put etre d6tect6 dans les autoradiographies. Toutefois, des mesures indiquerent que de petites quantitis de ces quatre produits non enregistris par les autoradiographies pouvaient migrer dans le sens racines-•feuilles. L'utilisation d'^liments marques ne permit pas de d^tecter un mouvement du diquat ou du paraquat vers les racines ou vers les regions sup^rieures de la plante, mais l'autoradiographie d'une plante ayant re^u une application de paraquat sur les racines montra une faible migration dans les parties inf^rieures de la tige. L'absorption et la migration d'herbicides marquis dans une mauvaise herbe imergente {Alternanthera philoxeroides (Mart.) Griseb.) a iti aussi itudiie. Le noircissement du film indiqua que la mobility relative des herbicides appliques aux racines s'itabliss...

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Solute Movement in Submerged Angiosperms

Denny

1980

Biological Reviews

129

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The Translocation of 2,4-D-1-C[superscript fourteen] in Potamogeton pectinatus, a Submersed Aquatic Plant

Cited by 4 publications

References 0 publications

Studies of Absorption of 32P, 59FE, and 45CA by Water-Milfoil (Myriophyllum Exalbescens Fernald)

Studies of Absorption of 32P, 59FE, and 45CA by Water-Milfoil (Myriophyllum Exalbescens Fernald)

Absorption and Translocation of Radioactive Herbicides in Submersed and Emersed Aquatic Weeds*

Solute Movement in Submerged Angiosperms

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