INDEX 



517 



fluorescence of, 14. 



infrared absorption sjicctra of, 39, 



41, 42-44. 

 phosphorescence of, 14. 

 Pheophorbide a-2,4-dinitrophenyl- 



h3^drazone, infrared absorp- 

 tion spectra of, 37, 39, 42-44. 

 Pheophytin 



absorption spectrum of, 35. 

 fluorescence of, 13. 

 hydration of magnesium in, 13. 

 Pheophytin a 



fluorescence of, 17-18. 

 infrared absori)tion spectra of, 37, 

 38, 40, 41, 42-44. 

 Pheophytin b 



fluorescence of, 17-18. 

 infrared absortion spectra of, 39, 40, 

 41, 42-44. 

 Pheophytin d, fluorescence of, 17-18. 

 Phosphate 



dark fi.\ation of 

 by Chlorella, 335. 

 by Chromatmrn, 335. 

 Phosphate metabolism, 303-345. 

 Phosphate uptake 

 by Chlorella, 334-339. 

 inhibition by CO of, 313-325. 

 Phosphoglyceric acid. See PGA. 

 Phosphorescence 

 of chlorophyll a, 8. 

 of chlorophyll 6, 8, 14. 

 of organic molecules, 8. 

 Phosphorescence quenching, as method 



of O2 determination, 13-14. 

 Phosphorescence yield, of chlorophyll, 



14-16. 

 Phosphorus-32, in photosynthesis of 

 barley leaves, 314-325, 327- 

 332. 

 Phosphorus deficiency, effect on photo- 

 reduction of, 245. 

 Phosphorylation 



with chloroplast fragments, 272. 

 dark reaction. See Dark phosphoryla- 

 tion. 

 efi"ect of temperature on, 299. 



light-induced. See Photophosphoryla- 



tion. 

 oxidative. See Oxidative phosphoryla- 

 tion. 

 photosynthetic. See Pholosynthetic 



phosphorylation. 

 rate of, 299. 

 Photobleaching, in oxygen-free metha- 

 nol, 69. 

 Photochemical outburst, of CO2 in 

 background CO2 fixation, 208- 

 211. 

 Photochemical reduction, of nitrate, 



252. 

 Photochemical step, primary. See Pri- 

 mary photochemical step. 

 Photoconductors, luminescence of, 132. 

 Photodecarboxylation, 208-211. 

 Photoinhibition, 357-360. 

 action spectrum of, 360. 

 in Chlorella, 357-360. 

 dependence on oxygen pressure of, 



361. 

 scheme of, 359. 

 Photoperiodicity 



efi'ect of metabolites on, 496. 

 in Hydrodictyon, 490-498. 

 Photoperiodism, 486-488. 



efi"ect on quantum yield of, 489. 

 inhibitors in explanation of, 493. 

 Photophosphorylation, 267. See also 

 Photosynthetic phosphoryla- 

 tion. 

 anaerobic. See Anaerobic photophos- 

 phorylation. 

 by anaerobic bacteria, 159. 

 by chloroplasts, 340-345. 

 by Chromati^im, 311-312. 

 cofactor of 



ascorbic acid as, 340, 343. 

 FMN as, 303, 311, 340-343. 

 magnesium as, 340. 

 vitamin K as, 340-343. 

 effect of CO2 on, 342. 

 effect of O2 on, 341. 

 effect of reducing agent on, 305-308. 

 effect of vitamin K on, 309-310. 



