The Hill Reaction of Red Kidney Bean Chloroplasts.

Abstract

The Hill reaction activity of red kidney bean chloroplasts with indophenol dye as the oxidant were found to be rather low. By changing several conditions during grinding of the leaves it was possible to obtain chloroplasts with activities 3 to 5 times as high as those originally tested. The higher activity shows up primarily at high light intensities. From the shape of the curves showing inactivation as a function of the length of sonic oscillation, 2 pathways are postulated for dye reduction.