Abstract

A study on light-induced structural changes in isolated chloroplasts has led to some conclusions and assumptions, which could be summarized as follows: 1. Structural changes are associated with a transfer of electrons Izawa, Good 1966; 2. There is a dependence between a high-energy state of chloroplast (X E) and direction (swelling - contraction) of structural changes Hind, Jagendorf 1965;3. Swelling and contraction are connected with the light-induced shift in the internal pH of chloroplast Deamer, Crofts, Packer 1967. The present paper provides some experimental results, which testify a possibility of the key role of ATPase in the changes in structural states of chloroplasts.

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