Cereal Chem 48:533 - 539.  |  VIEW ARTICLE
Free Amino Acids in the Bleeding Sap and Developing Grain of the Rice Plant.

G. B. Cagampang, L. J. Cruz, and B. O. Juliano. Copyright 1971 by the American Association of Cereal Chemists, Inc. 

Amino acids in the bleeding sap collected from the culm of the rice plant (Oryza sativa L.) and in the ethanolic extract of grain at the midmilky stage (10 days after flowering) were analyzed from seven pairs of lines differing in grain protein content. The concentration of total free amino acids in the developing grain of the high-protein lines was higher than that in the grain of the low-protein lines for all pairs. Only five pairs showed a similar trend for total free amino acids in the sap. The sap and the grain differed in the composition of free amino acids.