PJB-1986-7
BIOCHEMICAL RESPONSE OF POTATO TO VARIOUS LEVELS OF SOIL MOISTURE TENSION
R. AHMAD, P. AKHTAR AND D.
KHAN
Abstract
Effects of soil moisture tension on yield and biochemical composition of potato tubers cv.
Cardinal were investigated. Under moisture
tension of 60 and 80% AWR, normal tuber initiation was affected and yield declined.
Individual weight of tubers, increased under
stressed conditions. Increase in water stress appeared to promote foliar concentration of chlorophyll-b associated with increase in specific gravity of the tubers. The reducing sugar content, however, behaved irregularly. There was decline in protein content, and rise in Total Glycoalkaloids (TGA) of the tubers. TGA under 80% AWR irrigation was found to cross the permissible limit deteriorating the quality of the tubers.
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