<P> The overall process of photosynthesis takes place in four stages: </P> <Table> <Tr> <Th> Stage </Th> <Th> Description </Th> <Th> Time scale </Th> </Tr> <Tr> <Td> </Td> <Td> Energy transfer in antenna chlorophyll (thylakoid membranes) </Td> <Td> femtosecond to picosecond </Td> </Tr> <Tr> <Td> </Td> <Td> Transfer of electrons in photochemical reactions (thylakoid membranes) </Td> <Td> picosecond to nanosecond </Td> </Tr> <Tr> <Td> </Td> <Td> Electron transport chain and ATP synthesis (thylakoid membranes) </Td> <Td> microsecond to millisecond </Td> </Tr> <Tr> <Td> </Td> <Td> Carbon fixation and export of stable products </Td> <Td> millisecond to second </Td> </Tr> </Table> <Tr> <Th> Stage </Th> <Th> Description </Th> <Th> Time scale </Th> </Tr> <Tr> <Td> </Td> <Td> Energy transfer in antenna chlorophyll (thylakoid membranes) </Td> <Td> femtosecond to picosecond </Td> </Tr>

Which of these is not something that could effect the rate of photosynthesis