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In vitro toxin production by Fusarium solani f. sp. piperis Trop. Plant Pathol.
Duarte,Maria de Lourdes R.; Archer,Simon A..
Fusarium solani f. sp. piperis (teleomorph: Nectria haematococca f. sp. piperis), causal agent of root rot and stem blight on black pepper (Piper nigrum), produces secondary metabolites with toxigenic properties, capable of inducing vein discoloration in detached leaves and wilting in transpiring microcuttings. Production of F. solani f. sp. piperis (Fsp) toxic metabolites reached a peak after 25 days of static incubation on potato sucrose broth at 25 ºC under illumination. Changes in the pH of the culture filtrate did not alter the effect of toxic metabolites. However, when the pH was changed before the medium had been autoclaved, a more intense biological response was observed, with an optimum at pH 6.0. Isolates that produced red pigments in liquid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Secondary metabolites; Resistance; Black pepper; Piper betle.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582003000300002
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Effects of Thai piperaceae plant extracts on Neospora caninum infection OAK
Leesombun, Arpron; Boonmasawai, Sookruetai; Nishikawa, Yoshifumi.
Neosporosis has a worldwide distribution and causes economic losses in farming, particularly by increasing the risk of abortion in cattle. This study investigated the effects of Thai piperaceae (Piper betle, P. nigrum, and P. sarmentosum) extracts on Neospora caninum infections in vitro and in vivo. In an in vitro parasite growth assay based on the green fluorescent protein (GFP) signal, P. betle was the most effective extract at inhibiting parasite growth in human foreskin fibroblast cells (IC50 of GFP-expressing N. caninum parasites, 22.1 mu g/ml). The P. betle extract, at 25 mu g per ml, inhibited parasite invasion into host cells. Furthermore, in two independent experiments, treating N. caninum-infected mice with the P. betle extract for 7 days...
Palavras-chave: Neospora caninum; Neosporosis; Piper betle; Piper nigrum; Piper sarmentosum; Ethanol extract.
Ano: 2017 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4578
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Antioxidant and antimicrobial potential of selected varieties of Piper betle L. (Betel leaf) Anais da ABC (AABC)
SARMA,CHAYANIKA; RASANE,PRASAD; KAUR,SAWINDER; SINGH,JYOTI; SINGH,JOGINDER; GAT,YOGESH; GARBA,UMAR; KAUR,DAMANPREET; DHAWAN,KAJAL.
Abstract Piper betle L., is an evergreen perennial creeper belonging to family Piperaceae and is known to possess numerous medicinal properties. Current study focuses on evaluating antioxidant and antimicrobial potential of betel leaf. For the present study, distilled water, hexane, acetone and ethanolic extracts of two varieties of betel leaves: Meetha paan and Banarasi paan were used. Biochemical tests such as proximate analysis (moisture, ash, protein, lipids, minerals viz., sodium and potassium), antioxidant activity tests (DPPH radical scavenging activity, total phenolics, ascorbic acid, reducing power) and antimicrobial test (antibacterial and antifungal susceptibility test) against four pathogens viz., B. subtilis, E. coli, A. niger and S....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Piper betle; Piperaceae; Antioxidant; Antimicrobial; Biochemical.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703871
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