Behavior of BAS-9052 OH in Soybean (<i>Glycine max</i>) and Johnsongrass (<i>Sorghum halepense</i>) Plant and Cell Cultures

Swisher, Beth A.; Corbin, F. T.

doi:10.1017/s0043174500041357

Cited by 49 publications

(26 citation statements)

References 12 publications

(17 reference statements)

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“…Penetration and translocation of 14 C-sethoxydim have been evaluated in several crop species (Campbell and Penner, 1980;Hosaka and Takagi, 1987;Nalewaja and Skrzypczark, 1986;Rhodes and Coble, 1984;Swisher and Corbin, 1982;Wills, 1984). Translocation of 14 C was similar in most species {oat (Avena sativa L.), sunflower (Helianthus annuus L.), linseed (Linum usitatissimum L.), soybean [Glycine max (L.) Merr.…”

mentioning

confidence: 99%

Absorption, Translocation, and Metabolism of Sethoxydim in Centipedegrass and Goosegrass

McCarty¹,

Higgins²,

Corbin³

et al. 1990

jashs

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Absorption, translocation, and metabolism of foliar-applied 14C-labeled sethoxydim (14C-sethoxydim) in sethoxydim-tolerant centipedegrass [Eremochloa ophiuroides (Munro) Hack.] and sethoxydim-sensitive goosegrass [Eleusine indica (L.) Gaertn.] were determined. The distribution of 14C in treated leaves indicated that similar amounts (≈ 3%) were found in the epicuticular wax fraction (chloroform wash) of both species after 6 hours. After 2 hours, 16% of the applied 14C-sethoxydim was absorbed in the treated leaf by centipedegrass, but only 2% was absorbed by goosegrass. After 2 hours, centipedegrass also readily translocated greater amounts of 14C than goosegrass (4.3% vs. 0.4%). Six hours after treatment, however, no differences were found in amounts absorbed by the treated leaf and translocated to apical and basal leaves. Because sethoxydim-tolerant centipedegrass absorbed and translocated similar amounts of 14C compared to the sethoxydim-sensitive goosegrass, these two mechanisms do not appear to be a means of tolerance. The major difference found between the two species was in the metabolism of sethoxydim. After 6 hours, 81% to 98% of the 14C in goosegrass extracts remained as 14C-sethoxydim. In contrast, only 1% of the 14C found in apical leaves, basal leaves, and roots of centipedegrass was identified as 14C-sethoxydim. These data indicated that differences in tolerance to sethoxydim between these two species were based on metabolism. Chemical name used: 2-[1-(ethoxyimino) butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2 -cyclohexen-1-one (sethoxydim).

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Absorption, Translocation, and Metabolism of Sethoxydim in Centipedegrass and Goosegrass

McCarty¹,

Higgins²,

Corbin³

et al. 1990

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“…Cyclohexanediones are known to be unstable compounds in both biotic and abiotic systems (Swisher & Corbin, 1982;Hudetz, 1989). Therefore, it is likely that breakdown of cycloxydim molecules occurred both in the medium and inside the cells.…”

Section: Cycloxydim Absorption and Metabolismmentioning

confidence: 99%

Cycloxydim absorption by suspension‐cultured velvetleaf (Abutilon theophrasti Medic.) cells

1994

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Summary: Résumé: Zusammenfassung The influence of several experimental parameters (time, concentration, pH, and temperature) on cellular absorption of cycloxydim was studied using suspension–cultured velvetleaf (Abutilon theophrasti Medic.) cells. Cycloxydim and its metabolites accumulated in cells to a concentration higher than that of the external medium. Metabolism was rapid with 88.6 % conversion to metabolites within 6 h. Cycloxydim absorption was linearly related to the external cycloxydim concentration, indicating that cycloxydim absorption across cell membranes occurs by passive diffusion. Absorption was strongly pH–dependent, with more intracellular cycloxydim plus metabolites accumulating at acidic extracellular pH, indicating an ion–trap mechanism of absorption. Cycloxydim absorption was significantly higher at 20°C compared with 4 and 12°C, but no difference existed between the last two temperatures. Studies of the influence of three adjuvants (Armoblen T/25, BanDrift, and ammonium sulfate) on cycloxydim absorption demonstrated that BanDrift at 0.01% (v/v) and ammonium sulfate at 1.0 and 10 mM increased cycloxydim absorption at all times. However, Armoblen T/25 at 0.002% (v/v) increased cycloxydim absorption at only a short incubation time (30 min). Absorption du cycloxydime par des cultures de cellules d'Abutilon theophrasti Medic. L'influence de plusieurs paramètres expérimentaux (temps, concentration, pH et température) sur l'absorption du cycloxydime par des suspensions cellulaires de jute de Chine (Abutilon theophrasti Medic.) a étéétudiée. Le cycloxydime et ses métabolites s'accumulaient dans les cellules à une concentration supérieure à celle du milieu extérieur. La métabolisation était rapide avec 88.6 % de conversion en métabolites en 6 h. L'absorption de cycloxydime était linéaire en fonction de sa concentration externe, indiquant qu'il s'agit d'un phénomène passif. Elle était fortement dépendante du pH, les pH externes acides favorisant l'accumulation intracellulaire de cycloxydime et de ses métabolites, ce qui indique un mécanisme d'absorption à piégeage d'ions. L'absorption du cycloxydime était significativement supérieure à 20°C, comparéà 4 et 12°C, mais aucune différence n'était détectable entre les deux dernières températures. L'adjuvant BanDrift 0–01 % (v/v) et le sulfate d'ammonium 1 et 10 mM augmentaient l'absorption du cycloxydime à tous les temps d'incubation. L'adjuvant Armoblen T/25 0.002 % (v/v) ne l'augmentait que pour des temps d'incubation courts (30min). Absorption von Cycloxydim in Zellsuspensionen von Abutilon theophrasti Medic. Der Einfluß verschiedener Versuchsparameter (Zeit, Konzentration, pH und Temperatur) auf die Absorption von Cycloxydim in Zellen wurde mit Zellsuspensionen von Abutilon theophrasti Medic. untersucht. Cycloxydim und seine Metaboliten wurden in den Zellen in höherer Konzentration als im Umgebungsmedium akkumuliert. Die Metabolitenbildung verlief schnell (88.6 % in 6 h). Die Absorption des Wirkstoffs stand in linearer Beziehung zu der äußeren Konze...

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“…It has been proposed that herbicide phytotoxicity begins with the inhibition of acetyl-coenzyme A carboxylase (ACCase), a key enzyme in the biosynthesis of lipids (Kobek et al 1988). As a consequence of ACCase inhibition, the ultrastructure of plastids (Brezeanu et al 1976) and the growth of meristematic tissues are adversely affected (Swisher and Corbin 1982).…”

Section: Introductionmentioning

confidence: 99%

Effect of herbicide diclofop‐methyl on proton extrusion from Lolium multiflorum seedlings differing in resistance and in fungal endophyte (Neotyphodium sp.) infection

Vila‐Aiub¹,

Ghersa²,

Carceller³

2003

Physiologia Plantarum

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Lolium multiflorum (Italian ryegrass), an annual weed invading wheat and barley cropping systems, has evolved resistance to diclofop‐methyl (DM) herbicide. Earlier studies on the mode of action of DM in susceptible L. multiflorum and L. rigidum populations have shown that herbicide promotes oxidative stress leading to senescence, a process reversible through the action of auxins. The disruption of cell membrane potential (Em) appears to be correlated with DM phytotoxicity in susceptible populations, suggesting that the continuous H+ extrusion from plasmalemma to extracellular space is inhibited. L. multiflorum usually establishes a symbiotic relationship with fungal endophytes of the Neotyphodium genus. This fungus confers to host plants higher survival at sublethal dosages of DM, probably due to the production of auxinic compounds. Our goal was to characterize DM‐resistant and DM‐susceptible L. multiflorum populations infected (E+) and non‐infected (E−) with endophytes, by studying the capacity of H+ bumping of plasmalemma of intact roots under DM selection. We correlated the effects of DM on H+ disruption with plant survival. DM inhibited acidification markedly more in susceptible than in resistant populations. Continued extrusion of H+ by DM‐resistant cell membranes was positively related to plant survival and growth. There was no detectable difference in the capacity of bumping H+ between DM‐susceptible E+ and E− seedlings, even though survival was higher in E+ plants. The basis for the differential response in H+ extrusion between resistant and susceptible populations of L. multiflorum is discussed.

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Behavior of BAS-9052 OH in Soybean (Glycine max) and Johnsongrass (Sorghum halepense) Plant and Cell Cultures

Cited by 49 publications

References 12 publications

Absorption, Translocation, and Metabolism of Sethoxydim in Centipedegrass and Goosegrass

Absorption, Translocation, and Metabolism of Sethoxydim in Centipedegrass and Goosegrass

Cycloxydim absorption by suspension‐cultured velvetleaf (Abutilon theophrasti Medic.) cells

Effect of herbicide diclofop‐methyl on proton extrusion from Lolium multiflorum seedlings differing in resistance and in fungal endophyte (Neotyphodium sp.) infection

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