The influence of chilling temperature alteration of glyoxysomal succinate levels on isocitratase activity from germinating seedlings

Succinate inhibited isocitratase activity to a greater extent in isolated glyoxysomes of cold-sensitive cotton than in cold-tolerant castor bean seedlings. Exposure of either isolated glyoxysomes or intact seedlings prior to glyoxysome isolation to 5°C appeared to alter the permeability of the glyoxysomal membranes to succinate. Endogenous succinate accumulated in glyoxysomes from 5°C treated cotton seedlings but not in similarly treated castor bean seedlings.