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Toxins 2017, 9(7), 220; doi:10.3390/toxins9070220

Content of the Saponin Protodioscin in Brachiaria spp. from the Eastern Plains of Colombia

1
Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, D.C., Colombia
2
Departamento de Produccion Animal, Facultad de Medicina Veterinaria y de Zootecnia, Universidad Nacional de Colombia, Bogotá, D.C., Colombia
3
Laboratorio de Toxicologia, Facultad de Medicina Veterinaria y de Zootecnia, Universidad Nacional de Colombia, Bogotá, D.C., Colombia
*
Author to whom correspondence should be addressed.
Academic Editor: Bryan L. Stegelmeier
Received: 2 June 2017 / Revised: 27 June 2017 / Accepted: 6 July 2017 / Published: 13 July 2017
(This article belongs to the Section Plant Toxins)
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Abstract

Protodioscin is used as a marker of saponin content that could cause hepatotoxicity in ruminants. In Brachiaria spp. from two regions of the Colombian Eastern Plains (east mountain range of the Andean—“piedemonte” and Ariari River Valley) were determined this metabolite at 14 and 28 days post-cutting under different climatic conditions. No protodioscin was detected in B. dictyoneura or B. humidicola. In B. brizantha, B. decumbens and B. ruziziensis x B. decumbens x B. brizantha (hybrid), protodioscin content corresponded to an interaction between species, post-cutting time and season. Concentrations ≥1% (minimum toxic level) were recorded in B. decumbens and the hybrid, and to a lesser extent in B. brizantha. The concentration of protodioscin was higher at 28 days, when the pastures are suitable for consumption. B. brizantha accumulated the lowest saponin concentration, whereas the hybrid had the highest levels, particularly in the “piedemonte” and during drought (3.37%). Dry season favored the protodioscin concentration in B. decumbens (in river valley) and in the hybrid (in “piedemonte”). In the latter, there was a positive correlation with temperature and a negative with humidity, which are typical characteristics of dry periods. This is the first report of protodioscin content in the hybrid. View Full-Text
Keywords: Brachiaria spp.; protodioscin; saponin; Colombian eastern plains Brachiaria spp.; protodioscin; saponin; Colombian eastern plains
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Lozano, M.C.; Martinez, N.M.; Diaz, G.J. Content of the Saponin Protodioscin in Brachiaria spp. from the Eastern Plains of Colombia. Toxins 2017, 9, 220.

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