51G 



INDEX 



Oxidative phosphorylation 



in chloroplast reaction, 266-268. 

 by Rhodospirilluyn nibrum, 308-309. 

 Oxygen 

 effect of 



on back reactions, 270. 



on background CO2 fixation, 206- 



207, 211. 

 on CO inhibition, 317. 

 on kiminescence, 123, 136. 

 on photophosphorylation, 341. 

 as a quencher of chlorophyll fluores- 

 cence, 143. 

 reaction with CO2 acceptor of, 214. 

 reaction with "photogenic" agents 



of, 214, 220-223. 

 reduction by chloroplasts of, 258- 



262. 

 as substrate for chloroplast reaction, 

 257-262, 379. 

 Oxygen burst, 406-407, 410-411, 419- 

 429. 

 effect of dark intervals on, 423. 

 as function of oxygen concentration, 



421, 428. 

 independence of CO2 fixation of, 427. 

 relation to fluorescence of, 428. 

 Oxygen concentration 



influence on photosj'nthesis of, 419- 



429 

 oxygen burst as function of, 421, 428. 

 Oxj^gen determination, methods of, 



265. 

 Oxygen evolution 



by adapted Scenedesmus, 232-238. 

 under anaerobic conditions, 233-235. 

 effect of hydroxylamine on, 243-244. 

 effect of spectral changes in irradiat- 

 ing light on, 444-448. 

 manganese required for, 243-248. 

 in nitrate reductions, 251. 

 in nitrite reductions, 251. 

 in photoreduction, 235-237. 

 transients in, 412-417. 

 Oxygen exchange 



quinone stimulation by chloroplasts 

 of, 258-262. 



transients in, 353-354. 

 in algae, 409-411. 

 in Chlorella, 412-417. 

 O.xygen pressure, dependence of photo- 

 inhibition on, 361. 

 Oxj^hj^drogen reaction, 232-233. 



P32. See Phosphorus-S2. 

 P^. See Inorganic phosphate. 

 Paraphenylenediamine, effect on rate of 



photoreduction of, 52. 

 PBG, 475-483. 



action of Chlorella on, 478. 

 Pea chloroplasts, light saturation curve 



of, 265. 

 Pentose, glycolic acid from, 230. 

 Periodicity 



effect of growth medium on, 498. 

 effect on uniformity in light-dark 



cycle of, 487. 

 induced in photosynthesis, 490-498. 

 induced in respiration, 490-498. 

 Peroxidases, reduction of, 191. 

 Perrin's equation, 5, 7. 

 PGA, 139, 142-146. 



as hydrogen acceptor, 142. 

 reduction by chlorophyll of, 144. 

 traces in illuminated chloroplasts of, 

 291. 

 PGA levels, transients in, 441-442. 

 pH 



dependence of Hill reaction on, 383- 



384. 

 effect on pyridine nucleotides of, 69. 

 o-Phenanthroline, 243, 244, 298. 

 Phenolindophenol, used as Hill reagent, 



82, 382. 

 Phenj'l mercuric acetate, treatment of 

 whole-cell suspensions with, 

 193-195. 

 Phenylurethane, effect on luminescence 



of, 138. 

 Pheophorbide a 



divalent copper complex of 

 phosphorescence of, 14. 

 quenching of fluorescence of, 14. 



