The Effect of Herbicides on Lateral Roots and Nut Quality of Pecans

Norton, J. A.; Walter, John P.; Storey, J. Benton

doi:10.1017/s0043174500078607

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…The present experiments also showed high levels of accumulation of trifluralin in roots of intact peanut seedlings cultured at low tempera tures. Roots apparently are the more susceptible site of injury in plants (1,3,6). It appears probable that the in jury of trifluralin-treated peanut seedlings occurs under field conditions as a result of excessive trifluralin accumula tion in roots during cool periods.…”

Section: Hawxby Et Al : Trifluralin and Methazole In Peanutsmentioning

confidence: 99%

“…Trifluralin appears to inhibit lateral root growth by blocking cell division and causing irregularities in chromo some and nuclear behavior (2,3). Tap roots are not in hibited as greatly as lateral roots (1,6) WEED SCIENCE from the soil. The data of Kerchersid et al (5) indicated that less herbicide was taken up by tap roots than lateral roots since less trifluralin was taken up per gram of root tissue when young plants lacking lateral roots were trans planted to trifluralin-treated soil than when older seedlings with abundant lateral roots were used.…”

Section: Introductionmentioning

confidence: 99%

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Temperature Effects on Absorption and Translocation of Trifluralin and Methazole in Peanuts

1972

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The absorption and translocation of14C-labeled α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) and 2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione methazole from nutrient solutions of various temperatures by(Arachis hypogaeaL. ‘Starr’) seedlings were determined. The accumulation of trifluralin in roots at 24 hr after exposure to trifluralin was greatest at 21 C and decreased at higher temperatures up to 38 C. The amounts of trifluralin translocated and accumulated in hypocotyls, tops, and cotyledons were small but generally increased with temperature. The initial rate of absorption of trifluralin was greater in excised lateral root tips than in tap root tips, but there was a greater accumulation in excised tap roots at 24 hr. The initial rates of absorption were higher for excised lateral roots at high temperatures. Total absorption of trifluralin at equilibrium was not proportional to the initial rates of absorption but was highest at low (21 C) and high (38 C) temperatures for excised lateral roots. The absorption of methazole by roots and translocation to other plant parts increased linearly with temperature, and it tended to accumulate in the mature leaf tissue.

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Section: Hawxby Et Al : Trifluralin and Methazole In Peanutsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature Effects on Absorption and Translocation of Trifluralin and Methazole in Peanuts

1972

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“…Trifluralin affects root morphology of susceptible plant seedlings by reducing root growth and causing swelling near the root tips, which is referred to as clubbing or tumor for mation (2,4,7). Roots of monocotyledons are more affected by trifluralin than those of dicotyledons (1).…”

Section: Introductionmentioning

confidence: 99%

“…Swelling of root tissue occurs in the region of maximum elongation (2) and root inhibition may occur within hours of exposure to trifluralin (14). Trifluralin may also inhibit the production of lateral roots (3,6,7). Oliver and Frans (9) suggested that lateral root inhibition along the tap root of cotton (Gossypium hirsutum L.) and soybean {Glycine max (L.) Merr.]…”

Section: Introductionmentioning

confidence: 99%

Effects of Trifluralin on Root Morphology and Mineral Status of Wheat (Triticum aestivum) Seedlings

1984

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Growth chamber studies using one soil investigated the effects of trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) at 0.0, 0.4, and 0.8 ppmw on the root development and the mineral status of wheat (Triticum aestivumL. ‘Neepawa’) seedlings. The 0.8-ppmw trifluralin rate increased the number of seminal roots, reduced lateral root production, decreased root extension, caused root tips to swell (club-like appearance), and reduced root dry weights. However, 0.4-ppmw trifluralin caused only slight damage to the seedlings. Towards the end of the two-week growth period, damaged seedlings showed signs of recovery, which included an increased number of seminal roots, development of normal root extensions from clubbed root tips, and development of normal lateral root patterns. Trifluralin increased percent calcium and magnesium and decreased percent nitrogen, phosphorus, and potassium in wheat plants. The nutrient concentrations were more affected in 21-day-old plants than in 35-day-old plants, indicating the wheat seedlings were able to recover from trifluralin injury.

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“…According to Probst et al (9), trifluralin is not translocated in significant amounts to the tops of plants. Trifluralin appears to act primarily in the root system (2,5,6), and it is possible that herbicides which do not translocate acropetally could accumulate in the roots under cool conditions.…”

Section: Introductionmentioning

confidence: 99%

Effects of Temperature on Absorption and Translocation of Profluralin and Dinitramine

Hawxby

Basler

1976

Weed sci.

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The absorption, translocation, and metabolism of14C-profluralin [N-(cyclopropylmethyl)-α,α,α-trifluoro-2,6-dinitro-N-propyl-p-toluidine] and14C-dinitramine (N4,N4-diethyl-α,α,α-trifluoro-3,5-dinitrotoluene-2,4-diamine) in sorghum [Sorghum bicolor(L.) Moench ‘RS6–12′], barnyardgrass [Echinochloa crus-galli(L.) Beauv.], soybean [Glycine max(L.) Merr. ‘Dare’], and Palmer amaranth (Amaranthus palmeriS. Wats.) were determined after treatment with14C-labeled herbicides in nutrient solution for 24 hr at 16 or 38 C.14C-profluralin accumulated in roots to a greater extent at 16 C, while metabolism was greatest at 38 C. Very little14C-profluralin was translocated to the tops of plants. Conversely,14C-dinitramine accumulated in the tops of plants to a greater extent at 38 C. Metabolism was not greatly affected by temperature. These effects may relate to excess toxicity of profluralin at 16 C and dinitramine at 38 C in species which normally exhibit resistance to the herbicides.

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The Effect of Herbicides on Lateral Roots and Nut Quality of Pecans

Cited by 6 publications

References 3 publications

Temperature Effects on Absorption and Translocation of Trifluralin and Methazole in Peanuts

Temperature Effects on Absorption and Translocation of Trifluralin and Methazole in Peanuts

Effects of Trifluralin on Root Morphology and Mineral Status of Wheat (Triticum aestivum) Seedlings

Effects of Temperature on Absorption and Translocation of Profluralin and Dinitramine

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