D E Barcus

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Chloroplasts in living cells of detached and sectioned leaves of Pisum sativum had a thickness of 2.68 +/- 0.04 mu in the dark as determined from photographs made using a phase contrast microscope. Upon illumination with 4000 lux for 10 min, the chloroplasts flattened to 2.15 +/- 0.04 mu. There was a short lag period of about 11 sec at 1000 lux and 2 sec at(More)
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