|
|
|
|
|
| Lima,Flavia Gontijo de; Lee,Stephen Thomas; Pfister,James Alan; Miyagi,Eliane Sayuri; Costa,Gustavo Lage; Silva,Roberta Dias da; Fioravanti,Maria Clorinda Soares. |
| Brachiaria (signalgrass) is now the most widely used tropical grass genus in Central and South America. However, Brachiaria spp. can cause hepatogenous photosensitization in livestock. Steroidal saponins, specifically protodioscin, present in Brachiaria spp. may be responsible for liver injury and subsequent photosensitization. The objective of this study was to determine the effect of ensiling Brachiaria decumbens and Brachiaria brizantha or making hay from Brachiaria decumbens on the concentrations of steroidal saponin in these grasses. Brachiaria grass had no detectable levels of the saponin protodioscin after 24 days of ensiling. In addition, in Brachiaria decumbens, the concentration of the protodioscin decreased 48% over the first three days after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Haymaking; Hepatogenous photosensitization; Saponin; Protodioscin; Signalgrass; Silage.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000500858 |
| |
|
|
| Brum,Karine Bonucielli; Haraguchi,Mitsue; Garutti,Mirella Biasoli; Nóbrega,Fernanda Nogarol; Rosa,Beneval; Fioravanti,Maria Clorinda Soares. |
| Brachiaria species contain steroidal saponins and are involved in outbreaks of hepatogenous photosensitization. This research presents the levels of a steroidal saponin, protodioscin, in the seeds and aerial parts of B. brizantha and B. decumbens during different developmental stages (growth, bloom, fructification and seed fall). The butanolic fraction of the ethanolic extract of each stage was submitted to thin layer chromatography (TLC) and spectrophotometric analysis through the Ehrlich reagent in 515nm. The chromatograms in TLC of the butanolic fraction of B. brizantha and B. decumbens showed similar spots as the protodioscin standard. The estimated level of protodioscin isomers in B. brizantha and B. decumbens ranged from 0.5% to 2.1%, having the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria spp.; Photosensitization; Protodioscin; Spectrophotometry; Steroidal saponins. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100049 |
| |
|
|
|
