THE JOURNAL OF AGRICULTURE OF THE UNIVERSITY OF PUERTO RICO Behavior of Enzymes Governing Starch- and Su crose-Forming Pathways in Two Sugarcane Varie ties Supplied with Variable Nitrate and Phosphate in Sand Culture

Following earlier investigations which revealed a correlation between suppressed amylase and high sucrose in sugarcane (¿), more recent studies have shown relationships between the sucrose level and the enzymes starch phosphorylase, amylase, and hexokinase (#)• It was proposed that the critical factor was glucose-1-phosphate, and the capacity of this compound to enter by either of the following pathways:

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