Studies of the Rest Period. I. Growth, Translocation, and Respiratory Changes in the Embryonic Organs of the After-ripening Cherry Seed.

Abstract

The distribution of two quinones with coenzyme Q activity which are broadly distributed in higher plants has been determined. Particulate fractions from spinach leaves, the white and green portions of Pan- danus leaves, and the roots an(d shoots of corn seedlings have been examined with respect to the amount of coenzyme Q and Q2s4 present. Coenzyme Q is found in both white and green tissue and appears to be con- centrated in mitochondria, whereas Q254 is concentrated in chloroplasts and chloroplast-containing tissue. It is proposed that coenzyme Q is involved in mitochon- drial electron transport and that Q2s4 may be involved in photosynthetic electron transport.