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Plant and Cell Physiology, 1969, Vol. 10, No. 2 471-474
© 1969

Short communication

Incorporation of some possible radioactive intermediates into chlorogenic acid in sliced sweet potato tissue1

MINEO KOJIMA, TAKAO MINAMIKAWA2, HIROSHI HYODO and IKUZO URITANI

Laboratory of Biochemistry and Institute for Biochemical Regulation, Faculty of Agriculture, Nagoya University Nagoya, Japan

t-Cinnamic acid-2-14C, p-coumaric acid-2-14C and caffeic acid-2-14C were administered to discs of sweet potato roots and incorporation of each radioactive compound into chlorogenic acid was compared. The data suggest that chlorogenic acid is synthesized through either or both of two major pathways, phenylalanine -> t-cinnamate -> t-cinnamoyl derivative -> p-coumaroyl derivative -> chlorogenic acid and phenylalanine -> t-cinnamate -> p-coumarate -> p-coumaroyl derivative -> chlorogenic acid.

1Part 75 of the phytopathological chemistry of sweet potato with black rot and injury.

2Present address : Department of Biology, Tokyo Metropolitan University, Setagaya-ku, Tokyo.

(Received December 23, 1968; )
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