Analysis of Antinutritional Components of Oil and Meal in Different Provenances of Jatropha curcas from India

Abstract

The present work describes the estimation of antinutritional components such as phorbol esters in oil, trypsin inhibitors and phytates in the defatted meal of Jatropha curcas seeds collected from different geographical locations of India. The phorbol ester, trypsin inhibitor and phytate content in the defatted seed meal were extracted and estimated. Phorbol esters, the major toxic components vary from 0.9 to 3.2 mg/g in oil and 0.2 to 1.6 mg/g in the defatted meal. Similarly, a wide variation was observed for trypsin inhibitor (5.72-23.09 mg/g of defatted seed meal) and phytate (7.9-10.1 %) content in the meal of seeds collected from different geographical locations of India. The study also examined the variation of concentration of antinutritional components with the effect of meteorological parameters mainly climatological temperature and rainfall over stations. The phorbol esters content in the seed and meal are increased/decreased from region to region with the subsequent variation of temperature and rainfall. A similar trend is also observed in variation of trypsin inhibitors in seed cake whereas the variation of phytate concentration is not correlated with rainfall and temperature.