Structure-phytotoxicity relationship: Comparative inhibition of selected nitrogen containing aromatics to root elongation of Cucumis sativus

Wang, X.; Dong, Yalin; Han, Sang‐Ik; Wang, L.

doi:10.1007/s001280000143

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…Quantitative structure-activity relationships Phytotoxicity assays have proved suitable to investigate the mechanism of toxic action of various organic pollutants by means of quantitative structure-activity relationships, but the number of related studies is very limited compared to those on aquatic toxicity (Hulzebos et al 1991;Feng et al 1996;Wang et al 2000Wang et al , 2002aWang et al , 2002bWang et al , 2002cGramatica et al 2002).…”

Section: Phenolic Herbicide Toxicitymentioning

confidence: 99%

Assessment of phenolic herbicide toxicity and mode of action by different assays

Bettiol

Vettori

Minervini

et al. 2015

Environ Sci Pollut Res

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A phytotoxicity assay based on seed germination/root elongation has been optimized and used to evaluate the toxic effects of some phenolic herbicides. The method has been improved by investigating the influence of experimental conditions. Lepidium sativum was chosen as the most suitable species, showing high germinability, good repeatability of root length measurements, and low sensitivity to seed pretreatment. DMSO was the most appropriate solvent carrier for less water-soluble compounds. Three dinitrophenols and three hydroxybenzonitriles were tested: dinoterb, DNOC, 2,4-dinitrophenol, chloroxynil, bromoxynil, and ioxynil. Toxicity was also determined using the Vibrio fischeri Microtox® test, and a highly significant correlation was found between EC50 values obtained by the two assays. Dinoterb was the most toxic compound. The toxicity of hydroxybenzonitriles followed the order: ioxynil >bromoxynil >chloroxynil; L. sativum exhibited a slightly higher sensitivity than V. fischeri to these compounds. A QSAR analysis highlighted the importance of hydrophobic, electronic, and hydrogen-bonding interactions, in accordance with a mechanism of toxic action based on protonophoric uncoupling of oxidative phosphorylation. The results suggest that the seed germination/root elongation assay with L. sativum is a valid tool for the assessment of xenobiotic toxicity and can be recommended as part of a test battery.

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Section: Phenolic Herbicide Toxicitymentioning

confidence: 99%

Assessment of phenolic herbicide toxicity and mode of action by different assays

Bettiol

Vettori

Minervini

et al. 2015

Environ Sci Pollut Res

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“…The level of inhibitory effect of GRC water extract on seed germination and radicle elongation of lettuce was tested. Several recent studies suggested that phytotoxicity tests using seed germination rate and root elongation are a valuable for ecotoxicology in higher terrestrial plants [12] . The water extract of GRC inhibited the seed germination and radicle elongation of lettuce seedlings.…”

Section: Evaluation Of the Level Of Inhibitory Effect Of Grc By The Smentioning

confidence: 99%

Evaluation of the Upland Weed Control Potentiality of Green Tea Waste â€“ Rice Bran Compost and Its Effect on Spinach Growth

Khan¹,

Ueno²,

Horimoto³

et al. 2007

American J. of Agricultural and Biological Sciences

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This study evaluated the upland weed control potentiality, germination inhibition ability and growth suppression efficiency of the five combinations of green tea waste-rice bran compost (GRC). GRC was prepared by mixing green tea waste and rice bran at five ratios, and allowed to decompose for 5 mo. Application of GRC suppressed weed growth up to 93.4% in number and 95.4% in dry weight in 2004, and 80.7% in number and 73.4% in dry weight of weeds in 2005, as compared with the untreated control (only soil) under the greenhouse condition. Among the five combinations of GRC, rice bran alone (RC) showed the significantly highest and green tea waste alone (GC) showed the lowest weed suppressing activity in both years. The weed control potentiality of GRC was increased by the increase of rice bran percentages in the mixture. The exudates of GRC inhibited the hypocotyl and radicle elongation of lettuce seedlings when examined by the sandwich method. The water extracts of GRC also inhibited the germination and radicle elongation of the test species in the seed germination tests. The growth inhibitory activity of RC was greater than that of GC, and radicle elongation was more sensitive than seed germination and hypocotyl elongation in all bioassays. The inhibitory activity of GRC water extract varied with the test species and was higher for the dicotyledonous species than monocotyledonous species. The inhibitory effect on seed germination and seedling growth increased as the extract concentration increased. The concentration dependent responses of test species to the water extract of GRC indicated that it might contain phytotoxic substances that were responsible for growth inhibition. Moreover, GRC promoted spinach growth significantly compared with the untreated control. These results suggest that the use of 30% green tea waste + 70% rice bran mixture compost (GRC-3) might be useful to control the upland weeds and enhance spinach growth among the five combinations of GRC, and it may reduce the use of hazardous synthetic agrochemicals. Optimization of the combination of composting materials is necessary for the multipurpose use compost.

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Mechanism-based quantitative structure–activity relationships for the inhibition of substituted phenols on germination rate of Cucumis sativus

Wang

et al. 2002

Chemosphere

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Structure-phytotoxicity relationship: Comparative inhibition of selected nitrogen containing aromatics to root elongation of Cucumis sativus

Cited by 6 publications

References 10 publications

Assessment of phenolic herbicide toxicity and mode of action by different assays

Assessment of phenolic herbicide toxicity and mode of action by different assays

Evaluation of the Upland Weed Control Potentiality of Green Tea Waste â€“ Rice Bran Compost and Its Effect on Spinach Growth

Mechanism-based quantitative structure–activity relationships for the inhibition of substituted phenols on germination rate of Cucumis sativus

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