Fate of Prometryn in Prometryn-Tolerant and -Susceptible Cotton Cultivars

Waldrop, Mark P.; Sterling, Tracy M.; Khan, Rehana A.; Molin, William T.

doi:10.1006/pest.1996.0065

Cited by 6 publications

(3 citation statements)

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“…Pima cotton has high rates of g s and photosynthesis (Cornish et al 1991), and typically has a higher E rate than upland cotton cultivars during early and late season growth (Munk et al 2004). However, significant differences in E between cotton cultivars were not evident in this experiment, or in previous work examining prometryn tolerance (Waldrop et al 1996). Additionally, other studies have demonstrated that RuBP carboxylase activity decreases under low nitrogen levels, causing reduced carbon fixation and lower rates of photosynthesis in Pima cotton (Reddy et al 1996), apple (Malus domestica Borkh) (Cheng and Fuchigami 2000), and a variety of other C 3 plant species (Evans 1989).…”

Section: Physiological and Growth Responsescontrasting

confidence: 59%

“…In previous work, cotton cultivars varied in tolerance to the PSII inhibitor, prometryn (Molin and Khan 1996;Waldrop et al 1996). Prometryn tolerance was not explained by differences in absorption, translocation, metabolism, sequestration into lysigenous glands (Waldrop et al 1996), or site of action (Khan and Molin 1996). Thus, we have hypothesized that this differential herbicide tolerance may be due to reduced sensitivity to oxidative stress.…”

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confidence: 89%

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Physiological and antioxidant responses of cotton and spurred anoda (Anoda cristata) under nitrogen deficiency

Bettmann

Ratnayaka

Molin³

et al. 2006

Weed sci.

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Spurred anoda is a major competitor with cotton in the southern United States. Physiological and antioxidant responses of two species of cotton (Gossypium barbadenseL. cv. ‘Pima S-7’ andGossypium hirsutumL., Delta and Pine Land Company cv. ‘Delta Pine 5415’) and two accessions of spurred anoda [New Mexico (NM) and Mississippi (MS)] were investigated under nitrogen (N) -sufficient and -deficient conditions in the greenhouse. Pima S-7 had the highest leaf N content of all the plants regardless of treatment. Biomass decreased in all species when N was withheld, with Pima S-7 exhibiting the least reduction and MS the greatest. Plant height decreased in cotton but not spurred anoda under N stress. Height:node ratio increased 9% in MS, but decreased 8% in DP 5415 when they were deprived of N. Withholding N reduced photosynthesis 45% regardless of species. Comparable decreases were found in stomatal conductance and transpiration, suggesting strong stomatal regulation of gas exchange under N stress. The quantum efficiency of photosystem II (dark-adaptedFv/Fm) decreased 4% under N deficiency. Alpha-carotene decreased for all species when N was withheld, except for the NM accession, in which the levels increased. Total chlorophyll and lutein decreased under N stress regardless of species, but alpha-tocopherol and the xanthophyll cycle conversion state increased. Pima S-7 had the most chlorophyll and lutein, and both cotton species had more alpha-tocopherol, anthocyanins, and free-radical scavenging capacity than spurred anoda. These enhanced pigment and antioxidant profiles of cotton, particularly Pima S-7, may contribute to cotton's ability to compete for N with spurred anoda.

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Section: Physiological and Growth Responsescontrasting

confidence: 59%

mentioning

confidence: 89%

Physiological and antioxidant responses of cotton and spurred anoda (Anoda cristata) under nitrogen deficiency

Bettmann

Ratnayaka

Molin³

et al. 2006

Weed sci.

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“…These residues accumulate in soil and water, posing a serious threat to biological diversity and human health [5]. For example, using prometryn in cotton fields often negatively impacts cotton growth and reduces production [6,7]. It was previously reported that the detection rate of prometryn in some waters was as high as 12.5%.…”

Section: Introductionmentioning

confidence: 99%

Obtaining a Monoclonal Antibody against a Novel Prometryn-Like Hapten and Characterization of Its Selectivity for Triazine Herbicides

El‐Aty

Zhao

et al. 2022

Biosensors

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In this study, a previously unreported 3-((4-(isopropylamino)-6-(methylthio)-1,3,5-triazin-2-yl) amino) butyric acid hapten was designed and synthesized. This maximized the exposure of the antigen-determinant isopropyl of prometryn to the immune system in animals to induce the production of anticipated highly specific anti-prometryn antibodies. The hapten has a molecular weight of 285.37 Da. The compound was confirmed by nuclear magnetic resonance hydrogen spectroscopy (1H NMR), nuclear magnetic resonance carbon spectroscopy (13C NMR), and high-resolution mass spectrometry (HRMS). By using the active ester approach, immunogens and coated antigens were created. Bovine serum albumin (BSA) was used as an immunogen, along with the successfully produced hapten, to immunize mice. The IC50 value of mouse monoclonal anti-prometryn antibody (mAb) 7D4 (the quantity of analyte that generated 50% prometryn inhibition) was 3.9 ng/mL. The anti-prometryn mAb was of the IgG1 subclass. The IC20 (80% binding level (B/B0) of prometryn)-IC80 (20% binding level (B/B0) of prometryn) range of the anti-prometryn monoclonal antibody standard curve working range was 0.9–18.1 ng/mL. The prepared mAb has good characteristics because it can specifically recognize prometryn, and the cross-reaction rates for ametryn, desmetryn, and terbumeton were 34.77%, 18.09%, and 7.64%, respectively. The cross-reaction rate with the other seven triazines was less than 1%. The hapten structure proposed can serve as an additional tool for modulating selectivity in detecting triazines.

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Tolerance of commercial Upland (Gossypium hirsutum) and Pima (G. barbadense) cotton cultivars, advanced breeding lines and glandless cotton to halosulfuron (Sandea) herbicide under field conditions

2018

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Fate of Prometryn in Prometryn-Tolerant and -Susceptible Cotton Cultivars

Cited by 6 publications

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Physiological and antioxidant responses of cotton and spurred anoda (Anoda cristata) under nitrogen deficiency

Physiological and antioxidant responses of cotton and spurred anoda (Anoda cristata) under nitrogen deficiency

Obtaining a Monoclonal Antibody against a Novel Prometryn-Like Hapten and Characterization of Its Selectivity for Triazine Herbicides

Tolerance of commercial Upland (Gossypium hirsutum) and Pima (G. barbadense) cotton cultivars, advanced breeding lines and glandless cotton to halosulfuron (Sandea) herbicide under field conditions

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