Effect of Serjania lethalis ethanolic extract on weed control

Grisi, Patrícia Umeda; Gualtieri, Sônia Cristina Juliano; Anese, Simoni; Pereira, Viviane Camejo; Forim, Moacir Rossi

doi:10.1590/s0100-83582013000200001

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…A intensidade dos efeitos fitotóxicos das substâncias 1a e 2a variou em função da concentração, das espécies de plantas daninhas utilizadas (M. pudica e S. obtusifolia) e dos tipos de bioensaios realizados. [20][21][22] Verificouse, também, que a intensidade dos efeitos esteve positivamente associada ao aumento da concentração, com inibições mínimas e máximas obtidas nas concentrações de 80 e 160 mg L -1 , respectivamente, tanto quando foram analisados os efeitos sobre a germinação das sementes, como do desenvolvimento da radícula e do hipocótilo, sendo as inibições efetivadas na concentração de 160 mg L -1 sempre superior estatisticamente (p>0,05) à concentração de 80 mg L -1 .…”

Section: Avaliação Dos Efeitos Fitotóxicosunclassified

Phytotoxic Activity of dihydrochalcones Obtained by Bioreduction of Chalcones Promoted by the Endophytic Fungus Aspergillus lavus

Pinto¹,

Ribeiro²,

Corrêa³

et al. 2020

Rev. Virtual Quim.

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The aim of this study was to evaluate the phytotoxic effects of dihydrochalcones obtained by biotransformation reactions of the corresponding chalcones, promoted by the endophytic fungus Aspergillus flavus. The compounds 3,4,5-trimethoxydihydrochalcone (1a) and 2,3,4,4'-tetramethoxydihydrochalcone (2a) obtained from their corresponding chalcones (1 and 2) were submitted to the bioassays monitored under controlled temperature of 25 o C and photoperiod of 12 hours. For bioassays were used as test plants two invasive species, Mimosa pudica L. (malícia) e Senna obtusifolia (L.) Irwin & Barneby (matapasto), belonging to the Fabaceae family. The phytotoxic effects of dihydrochalcones were analyzed at concentrations of 80 and 160 mg L-1. Substances 1a and 2a, at a concentration of 160 mg L-1 , showed significant inhibitions, respectively, 54% and 65% , against the germination of the species M. pudica. Inhibitions of 61% and 49% of M. pudica radicle growth were observed, respectively, to compounds 1a and 2a at concentration 160 mg L-1. In the bioassays performed, no significant phytotoxic activity of the tested substances was observed, at concentrations of 80 and 160 mg L-1 on the weed S. obtusifolia. O objetivo deste trabalho foi avaliar o efeito fititóxico de di-hidrochalconas obtidas por reação de biotransformação de suas correspondentes chalconas, promovidas pelo fungo endofítico Aspergillus flavus. As substâncias 3,4,5-trimetoxi-di-hidrochalcona (1a) e 2,3,4,4'-tetrametoxi-di-hidrochalcona (2a) obtidas por reação de biorredução de suas correspondentes chalconas (1 e 2) foram submetidas aos bioensaios monitorados sobre condições de temperatura controlada de 25 o C e fotoperíodo de 12 horas. Como plantas testes foram utilizadas as espécies daninhas Mimosa pudica L. (malícia) e Senna obtusifolia (L.) Irwin & Barneby (mata-pasto), pertencentes à família Fabaceae. Os efeitos fitotóxicos das di-hidrochalconas foram analisados em concentrações de 80 e 160 mg L-1. As substâncias 1a e 2a, na concentração de 160 mg L-1 apresentaram significantes inibições, respectivamente, 54% e 65% , frente à germinação da espécie M. pudica. Foram observadas inibições de 61% e 49% sobre o crescimento da radícula de M. pudica, respectivamente, para as substâncias 1a e 2a na concentração de 160 mg L-1. Nos bioensaios realizados, não foi observado nenhuma atividade fitotóxica significativa das substâncias testadas, nas concentrações de 80 e 160 mg L-1 sobre a planta daninha S. obtusifolia.

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Section: Avaliação Dos Efeitos Fitotóxicosunclassified

Phytotoxic Activity of dihydrochalcones Obtained by Bioreduction of Chalcones Promoted by the Endophytic Fungus Aspergillus lavus

Pinto¹,

Ribeiro²,

Corrêa³

et al. 2020

Rev. Virtual Quim.

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“…Compounds with phytotoxic activity can inhibit cell elongation. This might be associated with changes in the concentration of plant hormones such as cytokinins and auxins, since these are of vital importance in the development of roots, vascular differentiation, and in the gravitropism of plants (Gatti, Ferreira, Arduin, & Perez, 2010;Grisi, Gualtieri, Anese, Pereira, & Forim, 2013).…”

Section: Concentrationmentioning

confidence: 99%

Phytotoxic Potential of Benzyl Salicylate and Benzyl Benzoate on Bioindicator and Invasive Species

Fuentes¹,

Gualtieri²,

Imatomi³

et al. 2020

JAS

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The growing number of invasive species in agricultural areas reduces productivity and results in production losses. The need to discover new compounds with herbicidal activity increases as cases of resistance of invasive plants to herbicides rise. The aim of this study was to evaluate the phytotoxic potential of benzyl salicylate and benzyl benzoate upon the growth of Triticum aestivum coleoptiles and on the initial growth of Lactuca sativa, Lycopersicon esculentum, Allium cepa, T. aestivum, Euphorbia heterophylla, and Megathyrsus maximus. For the T. aestivum coleoptile bioassays, the treatments used the concentrations of 10-3 M, 3 × 10-4 M, 10-4 M, 3 × 10-5 M, and 10-5 M; while for the initial growth bioassays the concentrations of 10-3 M, 10-4 M, and 10-5 M were used. Both compounds presented a minimum of 89% growth inhibition on T. aestivum coleoptiles in all concentrations. Both compounds inhibited the growth of the root system and shoot of A. cepa and E. heterophylla at all concentrations. The species most affected by both compounds in all evaluated parameters was E. heterophylla. For the benzyl benzoate, the inhibition of the roots of E. heterophylla were statistically equivalent to those obtained with the herbicide. Regarding benzyl salicylate, the root inhibition in this species in the 10-4 M and 10-5 M treatments did not differ statistically from the herbicide in the same concentrations. Benzyl salicylate and benzyl benzoate are compounds that presented phytotoxic activity on E. heterophylla and for the first time the phytotoxic effect of these compounds on invasive species is reported.

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“…O critério morfológico para a classificação das folhas maduras foi a coloração verde escura e textura membranosa. O material vegetal foi lavado, seco em estufa de circulação forçada de ar a 40º C durante 72 horas e em seguida os materiais vegetais foram triturados separadamente em moinho elétrico (Grisi et al, 2013 (Otsuka, 2005). Depois de secos os extratos tiveram sua massa determinada (Fig.…”

Section: Materials E Métodos Materials Vegetalunclassified

“…O experimento foi realizado utilizando-se quatro repetições de dez plântulas cada. As caixas foram mantidas em câmaras de germinação sob temperatura de 25 ºC, com fotoperíodo de 12 horas e irradiância média de 13.38 ± 7.96 µmol m -2 s -1 (Grisi et al, 2013). Após sete dias foram medidos os comprimentos da raiz primária e da parte aérea com o auxílio de um paquímetro digital.…”

Section: Bioensaio De Crescimento De Plântulasunclassified

Phytotoxic Activity of Stem Bark and Leaves of Blepharocalyx salicifolius (Myrtaceae) on Weeds

Habermann¹,

Imatomi²,

Pereira³

et al. 2014

Acta biol. colomb.

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Effect of Serjania lethalis ethanolic extract on weed control

Cited by 10 publications

References 22 publications

Phytotoxic Activity of dihydrochalcones Obtained by Bioreduction of Chalcones Promoted by the Endophytic Fungus Aspergillus lavus

Phytotoxic Activity of dihydrochalcones Obtained by Bioreduction of Chalcones Promoted by the Endophytic Fungus Aspergillus lavus

Phytotoxic Potential of Benzyl Salicylate and Benzyl Benzoate on Bioindicator and Invasive Species

Phytotoxic Activity of Stem Bark and Leaves of Blepharocalyx salicifolius (Myrtaceae) on Weeds

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