01963naa a2200289 a 450000100080000000500110000800800410001910000130006024501300007326000090020350001510021252010250036365000330138865000130142165300170143465300280145165300190147965300120149865300170151065300160152770000180154370000180156170000170157970000190159670000200161577300380163510575932018-09-28       2015    bl uuuu     u00u1 u    #d1 aCOOK, D.  aChanges in swainsonine, calystegine, and nitrogen concentrations on an annual basis in Ipomoea carnea.h[electronic resource]  c2015  aArticle history: Received 31 October 2014.//Received in revised form 31 December 2014.//Accepted 3 January 2015.//Available online 5 January 2015.  aAbstract: Ipomoea carnea, a swainsonine containing plant, is known to cause a neurologic disease in grazing livestock in Brazil and other parts of the world. To better understand the relative toxicity and nutritional content of I. carnea we investigated swainsonine, calystegine, and crude protein concentrations in leaves of I. carnea on a monthly basis for one year in northern and northeastern Brazil. Swainsonine concentrations were detected at concentrations that could potentially poison an animal throughout the year although there was some variation between months. At one location swainsonine concentrations were generally the highest during the rainy season or the months immediately following the rainy season. Total calystegine concentrations were similar to those reported previously while crude protein concentrations are similar to those found in other Ipomoea species and are such that they may explain why I. carnea becomes desirable to grazing livestock as forage becomes limited during the dry season.  aENFERMEDADES DE LOS ANIMALES  aPASTOREO  aCALYSREGINES  aENFERMEDAD NEUROLÓGICA  aIPOMOEA CARNEA  aPROTEIN  aSALUD ANIMAL  aSWAINSONINE1 aOLIVEIRA,C.A.1 aGARDNER, D.R.1 aPFISTER, J.A1 aRIET-CORREA, G1 aRIET-CORREA, F.  tToxicongv. 95, p. 62 - 66, 2015.