| Abstract: | The interrelationships between light intensity and the activationof OH bands was investigated. The lag period prior toOH efflux activation was longer than the photosyntheticinduction period. It was found that this lag period dependedupon the light regime employed as well as the photosyntheticcapacity of the cell. The response of the cell to low light intensities revealed thatall OH bands were not of equal status. Below a criticallight intensity the cell did not develop any bands even afterprolonged illumination. An hypothesis is presented to accountfor these results, interms of total cell OH band activationand the regulation of the HCO3 and OH transportsystems. It is proposed that the electrical properties of theChara corallina plasmalemma, observed at high pH values, canbe explained on the basis of the hypothesis presented in thispaper |
