Cereal Chem 64:27-30   |  VIEW ARTICLE

Effect of Soil Sulfur Deficiency on Sulfur Amino Acids and Elements in Brown Rice.

B. O. Juliano, M. G. B. Ibabao, C. M. Perez, R. B. Clark, J. W. Maranville, C. P. Mamaril, N. H. Choudhury, C. J. S. Momuat, and I. I. Corpuz. Copyright 1987 by the American Association of Cereal Chemists, Inc. 

The effect of soil sulfur deficiency and its amelioration on contents of sulfur amino acids and of other elements estimated by energy-dispersive X-ray fluorescence spectrometry was determined on brown rice produced in sulfur-deficient soils in Bangladesh, Indonesia, and the Philippines. Cysteine plus methionine levels in protein were normal for rice grown in control plots and comparable to those grown in treated plots in field experiments in Bangladesh and Indonesia. Low cysteine plus methionine levels in protein were observed only in pot experiments in brown rice with N:S ratios of 16 and 25. Amino acid sulfur accounted for a mean of 78% of total sulfur in the 32 brown rices investigated. Levels of elements in brown rice were not affected by sulfur treatment of the sulfur-deficient soils.