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A study of the phytotoxic effects of the aerial parts of Senecio westermanii Dusén (Asteraceae) on Lactuca sativa L. and Allium cepa L. seeds BJPS
Merino,Francis José Zortéa; Ribas,Daniele Felipe; Silva,Cristiane Bezerra da; Duarte,Ana Flávia Schvabe; Paula,Cristiane da Silva; Oliveira,Maislian de; Dias,Josiane de Fátima Gaspari; Miguel,Marilis Dallarmi; Miguel,Obdulio Gomes.
The objective of this study was to evaluate the effects of the ethanolic crude extracts and fractions of the species Senecio westermanii Dusén on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. We assessed the germination, growth, root respiration and photosynthesis of the target species in Petri dishes (9.0 cm diameter) containing filter paper n°6. The study was conducted using 50 seeds per plate and held in 4 replicates per concentration of each sample. In the germination there was an inhibitory effect of fractions hexane (FH) and chloroform (FCl) at concentrations of 500 and 1000 µg/mL. There was a reduction in the radicle growth of lettuce by 14 to 24% and a reduction of hypocotilum by 14 to 28%. As for the radicle of the onion was up 74%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Senecio westermanii/extract/effects; Lactuca sativa; Allium cepa; Allelochemicals; Allelopathy..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000300606
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Phytotoxicity of Perlatolic Acid and Derivatives BABT
Peres,Marize Terezinha; Cândido,Ana Carina S.; Faccenda,Odival; Gianini,Aline Siqueira; Honda,Neli Kika.
ABSTRACT Perlatolic acid (1), methyl perlatolate (2), and the products of perlatolic acid alcoholysis-namely, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, and n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (3-11)-were evaluated for their herbicidal potential on Lactuca sativa L. (lettuce) and Allium cepa L. (onion) seeds. The compounds exhibited low phytotoxicity on L. sativa germination. Perlatolic acid (1) proved the most active compound (20%). Activity was lowest for n-hexyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (11) (3.5%). The esters iso-propyl and sec-butyl 2-hydroxy-4-methoxy-6-n-pentylbenzoate (6 and 8, respectively) inhibited root (35% e 43%, respectively) and hypocotyl growth (59% e 56%, respectively). The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Perlatolic acid; 2-hydroxy-4-methoxy-6-n-pentylbenzoates; Lactuca sativa; Allium cepa; Allelopathy..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100205
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Resíduos do sorgo sacarino afetam o desenvolvimento da soja em sucessão. Infoteca-e
SUTIER, G. A. da S.; GARCIA, R. A..
bitstream/item/148585/1/39-residuos.pdf
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Sorgoleone.; Alelopatia; Sorghum Bicolor.; Allelopathy..
Ano: 2016 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1054367
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