The measurement of aconitase activity in the leaves of various normal and variegated plants

Abstract
The spectrophotometric method of Racker (1950) lor the assay of aconitase has been adapted and applied to extracts of the leaves of a variety of plants. Reasons are given for considering that the method provides a measure of the aconitase originally present in the intact leaf. Results of tests on various plants are given in detail, including some obtained with the separated green and yellow parts of variegated leaves. A few assays of fumarase by the same method are reported. Some quantitative aspects of the values obtained are discussed.