On Pg. 199 of Campbell, this is stated.
Both* work by way of chemiosmosis, but in chloro- plasts, the high-energy electrons dropped down the transport chain come from water, while in mitochondria, they are extracted from organic molecules (which are thus oxidized).
*Both refers to the to chemiosmosis in mitochondria and in chloroplasts (during photosynthesis).
My question is, how do the high-energy electrons in the transport chain for chemiosmosis come from water? Aren’t these high-energy electrons derived from light harvesting done by the light-harvesting complexes?