Ozone-Herbicide Interactions on Sorghum (<i>Sorghum bicolor</i>) and Velvetleaf (<i>Abutilon theophrasti</i>) Seedlings

Hatzios, Kriton K.; Yang, Yaw-Shing

doi:10.1017/s0043174500070879

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…The exact mechanism of syner gistic and antagonistic interactions between herbicides and O3 on plants is unknown. Synergistic interactions between O3 and herbicides could result from either an 03-induced alteration of herbicide degradation in cer tain plants (4,5,6,9) or a herbicide-induced predispo sition of specific plants to greater injury by O3 (1, 14).…”

Section: Resultsmentioning

confidence: 99%

“…Exposure to 0 3 was initiated after plants were preequilibrated in the chamber for 2 h. Untreated seedlings were placed in another growth chamber with similar conditions for 6 h. 0 3 was generated by passing dry air through an ozone generator 3 . O3 concentrations in the growth chamber at plant height were monitored with a Monitor Labs Model 8410 O3 analyzer 4 . The monitor was calibrated every 2 weeks with a Dasibi Model 1003-pc O3 calibra tor 5 .…”

Section: Methodsmentioning

confidence: 99%

“…Ozone may interact with herbicides on certain crop plants, thereby modifying either the plant response to herbicides (1, 2,3,4,14) or the metabolism of herbi cides in fumigated plants (7,8,9,10). For example, pebulate (5-propyl butylethylcarbamothioate) and chloramben (3-amino-2,5-dichlorobenzoic acid) can in teract synergistically with O3 on selected cultivars of tobacco (Nicotiana tabacum L.) (1).…”

Section: Introductionmentioning

confidence: 99%

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Ozone-Metolachlor Interactions on Corn (Zea mays), Bean (Phaseolus vulgaris), and Soybean (Glycine max)

1989

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The potential interactive effects between metolachlor [0, 0.1, 0.5, and 1.0 ppm (w/w)] and the air pollutant ozone (O3) [0.2 and 0.4 ppm (v/v)], on growth of corn, bean, and soybean were examined under controlled conditions. At both concentrations, O3alone reduced corn and bean dry weights but only affected bean at 0.4 ppm (v/v). Shoot dry weight of corn was reduced by O3plus metolachlor more than expected, thus indicating synergism. The expected dry weights of bean and soybean treated with metolachlor plus O3were similar to or higher than expected, thus indicating additive or antagonistic interactions.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ozone-Metolachlor Interactions on Corn (Zea mays), Bean (Phaseolus vulgaris), and Soybean (Glycine max)

1989

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Phenmedipham-Ozone Pollution Interactions in Sugarbeet (Beta vulgarisL. cv. Saxon): A Physiological Study

et al. 1996

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Actively growing sugarbeet is treated with the post-emergent herbicide phenmedipham at times when ozone pollution episodes are likely to occur. There is a possibility of an interaction occurring between ozone and phenmedipham as both treatments produce similar effects in susceptible plants, such as a reduction in growth and photosynthesis and an increase in the activities of endogenous antioxidant enzymes. To investigate this likelihood, laboratory experiments were conducted in which two-to three-leaf sugarbeet plants (Beta vulgaris L. cv. Saxon) were exposed to a simulated two-day ozone episode (100 nl litre-'. 7 h day-I ) followed three days later by treatment with field rate phenmedipham (1.14 kg A1 ha-'). Growth analysis indicated that an interaction was occurring in which plants treated with ozone and phenmedipham had less reduction in shoot fresh weight than expected. Exposure to phenmedipham alone or ozone followed by phenmedipham reduced net photosynthesis by over 50% and transpiration rate by 30%. The activities of antioxidant enzymes such as catalase, guaiacol peroxidase and superoxide dismutase were stimulated by both treatments individually, but to a greater extent when ozone and phenmedipham were combined. For example, three days after herbicide treatment, the activity of superoxide dismutase increased by 20% in plants treated with ozone alone, 20% in plants treated with phenmedipham alone and 85% in plants that were treated with ozone followed by phenmedipham. We conclude that ozone pollution may predispose sugarbeet to tolerate the herbicide phenmedipham by enhancing the activity of the endogenous antioxidant detoxification enzyme system.

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Ozone pollution modifies the response of sugarbeet to the herbicide phenmedipham

Dixon

Hull

Cobb

et al. 1995

Water Air Soil Pollut

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Ozone-Herbicide Interactions on Sorghum (Sorghum bicolor) and Velvetleaf (Abutilon theophrasti) Seedlings

Cited by 4 publications

References 15 publications

Ozone-Metolachlor Interactions on Corn (Zea mays), Bean (Phaseolus vulgaris), and Soybean (Glycine max)

Ozone-Metolachlor Interactions on Corn (Zea mays), Bean (Phaseolus vulgaris), and Soybean (Glycine max)

Phenmedipham-Ozone Pollution Interactions in Sugarbeet (Beta vulgarisL. cv. Saxon): A Physiological Study

Ozone pollution modifies the response of sugarbeet to the herbicide phenmedipham

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