INDEX 



521 



effect of dye on, 52. 

 effect of poisons on, 245. 

 of photosynthesis, 237. 



near compensation point, ijlU- 



;-;52. 



Quenching. See also Bimolecular sclf- 

 q uenching, Concenlrat ion 

 quenching, Self-quenching, 

 Static qrienching. 

 by induced resonance, 6. 

 in chlorophyll solutions 

 by o.xidizing agents, 7. 

 by reducing agents, 7, 143. 

 of chlorophyll b by chlorophyll c, 



G-7. 

 effect of COo on, IIG, 145. 

 of excited state of oxj^gen, 86. 

 of long-lived state of chlorophyll, 9. 

 with methylene blue, 53-54, 

 of pheophorbide a, 14. 

 Quenching constants. See Bimolecular 

 quenching constant, Stern- 

 Volmer quenching constant. 



Quinone, 78, 143. 



association with chlorophyll of, 270. 



reaction with CO2 acceptor of, 214. 



reduction of, 252-253. 



toxicity of, 217. 

 Quinone stimulation, of O2 exchange, 



258-262. 

 R. rubrum. See Rhodospirillum ruhrum. 

 Radiationless transfer, 20. 

 Radiocarbon. See Carbon-14- 

 RDP levels, transients in, 441-442. 

 Red algae, 118-119. See also Por-phyra 

 lacineata. 



chromatic transients in, 444-449. 



fluorescence of, 126. 



Hill reaction activity of, 274. 



photosynthesis by, 444-449. 



plastids of, 274. 

 Reductants 



photoreduction with, 232-248. 

 of dyes, 50-51. 

 Reduction 



of chlorophyll, 70. 



of nitrates, 250-262. 

 photosensitized, 232-248. 

 of dyes, 50-51. 



of respiratory intermediates, 436- 

 440. 

 Reduction potential, of fluorescent 



dj-es, 55. 

 Relative polarization, 6. 

 Resonance, induced, 6, 363. 

 Respiration 



compensation by light of, 113. 

 effect on CO2 fixation of, 206. 

 effect of CO on, 317. 

 effect on photosynthesis of, 419-429. 

 induced periodicity in, 490-498. 

 in light. See Photorespiration. 

 role in photo-synthesis of, 271. 

 Respiratory intermediates 



photoreduction of, 403-404, 436. 

 reduction of, 436-440. 

 utilization of, 407. 

 Reversible bleaching, of chlorophyll. 



See Chlorophyll reactions. 

 Rhodopseudomonas, 151-153. 



CO2 fixation by, 240. 

 Rhodopseudomonas spheroides, 149, 152. 

 Rhodospirillum, 151-153. 

 Rhodospirillum ruhrum, 149, 151-152, 

 156-157, 159, 17&-176, 262. 

 absorption spectrum of, 174, 184- 



188. 

 dark reactions of, 179-180, 193-195, 



303, 311. 

 DPN added to, 195-196. 

 extracts of, 195-196. 

 hemoprotein in, 192. 

 light reactions of, 180-182. 



formation of ATP during, 159. 

 oxidative phosphorylation by, 308- 



309. 

 photophosphorylation by, 303-310, 



311. 

 reactions during the anaerol)ic light 



effect of, 184-188. 

 reactions with cytochrome c of, 179- 

 182. 



