Effect of Root Temperature on Absorption and Translocation of Atrazine in Soybeans

Vostral, Henry J.; Buchholtz, K. P.; Kust, C. A.

doi:10.1017/s004317450007747x

Cited by 26 publications

(31 citation statements)

References 6 publications

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“…Vostral et al (1970) reported atrazine uptake in soybean was enhanced by increasing temperature of the root system. Vostral et al (1970) reported atrazine uptake in soybean was enhanced by increasing temperature of the root system.…”

Section: Roots Shoots Total Roots Shoots Totalmentioning

confidence: 99%

Physiological Basis for Triazine Herbicide Tolerance in Bermudagrass, Seashore Paspalum, and Zoysiagrass

2015

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Atrazine and simazine control weeds in warm‐season turfgrasses, but excessive injury limits applications to sensitive species. The objective of this research was to evaluate the physiological basis for differential tolerances of bermudagrass (Cynodon dactylon (L.) Pers.), seashore paspalum (Paspalum vaginatum Sw.), and zoysiagrass (Zoysia japonica Steud.) to atrazine and simazine. In greenhouse experiments, hierarchical shoot mass reductions from the nontreated by species were: seashore paspalum > bermudagrass > zoysiagrass for atrazine and seashore paspalum > bermudagrass = zoysiagrass for simazine. Atrazine and simazine treatments to soil only or foliar plus soil reduced shoot mass similarly, averaging 45% from nontreated, while foliar‐only treatments reduced shoot mass 22% from the nontreated. Species rank for root absorption of both herbicides after 48 h from high to low was seashore paspalum > bermudagrass > zoysiagrass. All species had acropetal translocation of 14C‐atrazine and 14C‐simazine, but bermudagrass and zoysiagrass translocated ∼10% more 14C than seashore paspalum after 48 h. Hierarchical species rank for nonmetabolized 14C‐atrazine translocation to shoots after 8 h from high to low was seashore paspalum > bermudagrass > zoysiagrass. All species metabolized 14C‐atrazine to hydroxyatrazine and two unidentified metabolites in root and shoots. All species metabolized simazine to hydroxysimazine and two other metabolites in shoots. Seashore paspalum had less total metabolism of 14C‐simazine than bermudagrass and zoysiagrass and produced fewer metabolites in roots. Results suggest bermudagrass and seashore paspalum susceptibility to atrazine is associated with greater absorption and translocation of the parent herbicide to shoots than zoysiagrass. Seashore paspalum susceptibility to injury from simazine is associated with differences in absorption and metabolism from tolerant turfgrasses bermudagrass and zoysiagrass.

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Section: Roots Shoots Total Roots Shoots Totalmentioning

confidence: 99%

Physiological Basis for Triazine Herbicide Tolerance in Bermudagrass, Seashore Paspalum, and Zoysiagrass

2015

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“…The development of phytotoxic symptoms follows this distribution pattern (Ashton & Crafts, 1981). Atrazine absorption by soybeans is fast during the first 30 min followed by a phase of slow, continuous absorption (Vostral, Buccholtz & Kust, 1970). In sensitive plants the light reaction of photosynthesis is inhibited.…”

Section: Plant Factorsmentioning

confidence: 99%

“…The transpiration rate is also inhibited as a result of the closing of the stomata, owing to an accumulation of CO 2 in the stomatal regions (Vostral et al, 1970;Le Court de Billot & Nel, 1981). Photosynthesis is, however, the most sem;:ive process (Ashton, De Villiers, Glenn & Duke, 1977) and the chlorophyll and carotene contents of plants decrease in light (Stanger & Appleby, 1972) when disintegration of chloroplasts occurs (Ashton, Gifford & Bisalputra, 1963).…”

Section: Plant Factorsmentioning

confidence: 99%

Factors affecting the activity of atrazine in plants and soil

Nel

Reinhardt

1984

South African Journal of Plant and Soil

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Available research findings concerning the activity of atrazine in the plant and soil are presented in a brief review. The role of the environment is emphasized. This review is supplemented by recent research results of the University of Pretoria concerning evaluation of soil characteristics as a norm for the prediction of atrazine activity in turf soils, the comparison of a few maize hybrids with respect to their resistance towards atrazine and the influence of moisture and temperature on atrazine activity in light· textured soils. Guidelines for future research and for the use of atrazine are given. S. Afr. J. Plant Saif 1984, 1: 67 -72 'n Beknopte oorsig oor beskikbare navorsingsbevindinge betref· fende die aktiwiteit van atrasien in plante en in die grond word aangebied. Klem word gell3 op die rol van omgewingsfaktore. Hierdie oorsig word aangevul deur onlangse navorsingsresultate van die Universiteit van Pretoria, wat handel oor evaluasie van grondeienskappe as norm vir voorspelling van atrasien·aktiwiteit in turfgronde, vergelyking van enkele mieliebasters ten opsigte van verdraagsaamheid teenoor atrasien en die invloed van vog en temperatuur op atrasien·aktiwiteit in ligter gronde. Riglyne vir toekomstige navorsing en die gebruik van atrasien word verskaf. S.·Afr. Tydskr. Plant Grand 1984, 1: 67 -72 IntroductionDespite continuous research on factors affecting the activity of the triazines, conducted over almost a decade in South Africa and two decades in some overseas countries, knowledge of this subject remains insufficient. Unexpected cases of damage to crops or poor weed control still occur and confusion exists among scientists as to the exact cause of such occurrences.Atrazine is the most important herbicide in the summergrain producing regions of South Africa. A better understanding of the effect of the environment on the activity of this herbicide and related herbicides would be of immense value for agriculture in South Africa and the rest of the world.The purpose of this article is to give a concise review of research results concerning the use of atrazine. Emphasis is placed on the role of environmental conditions. An attempt is made to classify published data, while hitherto unpublished results of recent research at the University of Pretoria are briefly presented.

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“…Differences in the tolerance of plant species to atrazine have been ascribed to variation in the rates of absorption and translocation of the herbicide (Vostral, Buchholtz & Kust, 1970), dissimilarity in metabolic degradation rates (Penner, 1971), and discrepancies in the ability of atrazine molecules to inhibit photosynthetic electron transport (Fuerst & Norman, 1991).…”

Section: Introductionmentioning

confidence: 99%

Variable tolerance of some crop species to atrazine in various soils

Reinhardt

Nel

1993

South African Journal of Plant and Soil

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The carry-over of atrazine (2-chloro-4-ethylamino-6-isopropylamino-1 ,3,5-s-triazine), which occasionally causes damage to susceptible crops grown in rotation with atrazine-treated maize (Zea mays L.), calls for a refinement of the specified recropping intervals. Bioassays were conducted in a glasshouse to evaluate, w~h nine soils, the tolerance to atrazine shown by dry beans (Phaseolus vulgaris L. cv. Teebus), grain sorghum (Sorghum bicolor (L.) Moench cv. NK222), oats (Avena sativa L. cv. SWK001), soybeans (Glycine max (L.)Merr. cv. Forrest) and sunflower (Helianthus annuus L. cv. S0222). Significant differences between the tolerance of test species in experiments where dry beans/sunflower and oats/soybean combinations were evaluated are inconsistent with the single recrop interval that is stipulated for all four species. The amount of atrazine that was required to elicit a significant response from a particular test crop varied from soil to soil. The variable availability of atrazine in different soils for uptake by crop species needs to be considered to limit the risk when a sensitive follow-up crop is selected for a soil in which the amounts of toxic atrazine residues are known.Oordraging van atrasien (2-chloor-4-etielamino-6-isopropielamino-1 ,3,5-s-triasien), wat skade aan gevoelige opvolggewasse veroorsaak, vereis die verfyning van wagperiodes wat na gebruik van die onkruiddoder in mielies gestel word. Met biotoetse in 'n glashuis is die weerstandbiedendheid van droebone (Phaseolus vulgaris L. cv. Teebus), graansorghum (Sorghum bicolor (L.) Moench cv. NK222), hawer (Avena sativa L. cv. SWK001). sojabone (Glycine max (L.) Merr. cv. Forrest) en sonneblom (Helianthus annuus L. cv. S0222) teenoor atrasien in nege gronde vergelyk. Betekenisvolle verskille tussen die verdraagsaamheid van spesies in eksperimente waar die droeboon/sonneblom en hawer/sojaboon kombinasies getoets is, word nie deur die enkele wagperiode, wat vir al vier spesies aanbeveel word, weerspieel nie. Die hoeveelheid atrasien wat nodig was om 'n betekenisvolle reaksie by plante uit te 10k, het van grond tot grond verskil. Verskille tussen gronde, wat betref die beskikbaarheid van atrasien vir opname deur plante, behoort in ag geneem te word ten einde die risiko verbonde aan die keuse van 'n opvolggewas vir grond wat bekende hoeveeJhede toksiese atrasienresidue bevat so klein moontlik te hou.

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Effect of Root Temperature on Absorption and Translocation of Atrazine in Soybeans

Cited by 26 publications

References 6 publications

Physiological Basis for Triazine Herbicide Tolerance in Bermudagrass, Seashore Paspalum, and Zoysiagrass

Physiological Basis for Triazine Herbicide Tolerance in Bermudagrass, Seashore Paspalum, and Zoysiagrass

Factors affecting the activity of atrazine in plants and soil

Variable tolerance of some crop species to atrazine in various soils

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