Toxicity of thymol, carvacrol and their respective phenoxyacetic acids in Lactuca sativa and Sorghum bicolor

Alves, Thammyres de Assis; Pinheiro, Patrícia Fontes; Fontes, Milene Miranda Praça; Andrade-Vieira, Larissa Fonseca; Corrêa, Kellen Barelo; Cruz, Franceli Aparecida da; Júnior, Valdemar Lacerda; Ferreira, Adésio; Soares, Taís Cristina Bastos

doi:10.1016/j.indcrop.2018.01.071

Cited by 44 publications

(36 citation statements)

References 33 publications

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“…Our data are in agreement with previous studies on the herbicidal effect of carvacrol. In fact, this compound inhibited the germination and seedling growth of Amaranthus retroflexus , Chenopodium album and Rumex crispusa, Lolium rigidum, Lactuca sativa and Sorghum bicolour [27,28,29], and can cause chromosomal alterations in the meristematic cells of L. sativa [30].…”

Section: Resultsmentioning

confidence: 99%

Antimicrobial and Phytotoxic Activity of Origanum heracleoticum and O. majorana Essential Oils Growing in Cilento (Southern Italy)

et al. 2019

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There is a growing interest in a potential use of essential oils (EOs) as a replacement for traditional pesticides and herbicides. The aims of this study were to: (i) Identify the chemical composition of the two EOs derived from Origanum heracleoticum L. and O. majorana L., (ii) evaluate the in vitro antifungal activity of the EOs against some postharvest phytopathogens (Botrytis cinerea, Penicillium expansum, Aspergillus niger and Monilinia fructicola), (iii) evaluate the in vitro antibacterial activity against Bacillus megaterium, Clavibacter michiganensis, Xanthomonas campestris, Pseudomonas fluorescens and P. syringae pv. phaseolicola, (iv) evaluate the effect of both studied EOs on the spore germination percentage and their minimum inhibitory concentration (MIC) against M. fructicola, and (v) study the possible phytotoxicity of the two EOs and their major constituents, carvacrol for O. heracleoticum and terpinen-4-ol for O. majorana, against tha germination and initial radicle growth of radish, lettuce, garden cress and tomato. The two EOs demonstrated promising in vitro antimicrobial and antifungal activities against all tested microorganisms. EOs showed high inhibition of spore germination percentage at the minimal inhibitory concentration of 500 and 2000 µg/mL, respectively. Moreover, both germination and radical elongation of selected plant species were sensitive to the oils.

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Section: Resultsmentioning

confidence: 99%

Antimicrobial and Phytotoxic Activity of Origanum heracleoticum and O. majorana Essential Oils Growing in Cilento (Southern Italy)

et al. 2019

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“…Phytotoxicity of pure carvacrol stood out for its extremely high herbicidal activity on Amaranthus retroflexus and Chenopodium album , which was greater than the commercial herbicide 2,4-D isooctyl ester [ 66 ]. Moreover, de Assis Alves et al [ 67 ] demonstrated that carvacrol evidenced a genotoxic effect higher than glyphosate, altering the cell cycle in Lactuca sativa and Sorghum bicolor meristematic cells.…”

Section: Discussionmentioning

confidence: 99%

Potential Effects of Essential Oils Extracted from Mediterranean Aromatic Plants on Target Weeds and Soil Microorganisms

Jouini

Verdeguer

Pinton

et al. 2020

Plants

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Essential oils (EOs), extracted from aromatic plants, have been proposed as candidates to develop natural herbicides. This study aimed to evaluate the herbicidal potential of Thymbra capitata (L.) Cav., Mentha × piperita L. and Santolina chamaecyparissus L. essential oils (EOs) on Avena fatua L., Echinochloa crus-galli (L.) P. Beauv, Portulaca oleracea L. and Amaranthus retroflexus L. and their effects on soil microorganisms. A pot experiment was set up and three EOs at three doses were applied by irrigation. Efficacy and effects of EOs on weed growth were determined. Soil microbial biomass carbon and nitrogen, microbial respiration, and the main microbial groups were determined at days 7, 28 and 56. EOs demonstrated herbicidal activity, increasing their toxicity with the dose. T. capitata was the most effective against all weeds at the maximum dose. P. oleracea was the most resistant weed. Soil microorganisms, after a transient upheaval period induced by the addition of EOs, recovered their initial function and biomass. T. capitata EO at the highest dose did not allow soil microorganisms to recover their initial functionality. EOs exhibited great potential as natural herbicides but the optimum dose of application must be identified to control weeds and not negatively affect soil microorganisms.

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“…It is reported that phenol can affect negatively root growth, even present in low concentrations, and phenol can also inhibit seed germination (Kuiters 1989;Pinho et al 2017). Organic acids also are responsible for a decrease in root development, and the increase of chain organic acids is followed by an increase in its toxicity (Kopp et al 2007;de Tunes et al 2012;de Assis Alves et al 2018). This is in agreement with our results, whereas the root was more affected by the presence of different PW concentrations than the shoot, probably because roots were directly in contact with the solutions tested.…”

Section: Seed Germination and Seedling Growthmentioning

confidence: 99%

Toxicity evaluation of process water from hydrothermal carbonization of sugarcane industry by-products

Fregolente

Miguel

et al. 2018

Environ Sci Pollut Res

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Hydrothermal carbonization (HTC) is a thermochemical process carried out in an aqueous medium. It is capable of converting biomass into a solid, carbon-rich material (hydrochar), and producing a liquid phase (process water) which contains the unreactive feedstock and/or chemical intermediates from the carbonization reaction. The aim of this study was to evaluate the characteristics of process water generated by HTC from vinasse and sugarcane bagasse produced by sugarcane industry and to evaluate its toxicity to both marine (using Artemia salina as a model organism) and the terrestrial environment (through seed germination studies of maize, lettuce, and tomato). The experiments showed that concentrated process water completely inhibited germination of maize, lettuce, and tomato seeds. On the other hand, diluted process water was able to stimulate seedlings of maize and tomato and enhance root and shoot growth. For Artemia, the LC indicated that the process water is practically non-toxic; however, morphological changes, especially damages to the digestive tube and antennas of Artemia, were observed for the concentration of 1000 mg C L.

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Toxicity of thymol, carvacrol and their respective phenoxyacetic acids in Lactuca sativa and Sorghum bicolor

Cited by 44 publications

References 33 publications

Antimicrobial and Phytotoxic Activity of Origanum heracleoticum and O. majorana Essential Oils Growing in Cilento (Southern Italy)

Antimicrobial and Phytotoxic Activity of Origanum heracleoticum and O. majorana Essential Oils Growing in Cilento (Southern Italy)

Potential Effects of Essential Oils Extracted from Mediterranean Aromatic Plants on Target Weeds and Soil Microorganisms

Toxicity evaluation of process water from hydrothermal carbonization of sugarcane industry by-products

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