INDEX 



471 



Phosphatides, 3, 36 

 Phosphorus cycle, 246-247 

 Photonasty, 433-434 

 Photoperiodism, 423 

 Photosynthesis, 161 

 Phototropic camera, 153 

 Phototropism, 150 

 Physiological acidity and alkalinity 



of salts, 224 

 Physiological role of cations, 247-249 

 Physiological self-sterility, 438 

 Physiologically dry soil, 268-273 

 Phytin, 246 



Pigments, of chloroplasts, 168 

 respiration, 104 



PiRSCHLE, 31 



Plants of a long and short day, 423- 



427 

 Plasmodesmen, 342-343 

 Plasmolysis, 16-20, 25 

 Plastids, 167 

 Polarity, 402 

 Pollination, 437 

 Polypeptides, 60 



POPOFF, 142 

 PORODKO, 156 



Porometer, 307 



Potometer, 291 



Prianishnikov, 72, 74-75, 78, 257 



Priestley, 161 



Prolamins, 54 



Proteases, 59-60 



Protection from winter desiccation, 



360-361 

 Protective action of snow cover, 360 

 Protective action of sugars, 353-354 

 Protein composition, 2 

 Protein reserve, 50-54, 59, 76 

 Protein synthesis in the plant, 76-80 

 Proteinases, 61 

 Proteins, constitutional, 29 



enzymatic decomposition, 72-76 

 Protoplasm, chemical composition, 

 34-37 



R 



Rasumov, 426 

 Redox potential, 107 



Reduction, oxidation, 106 

 Refractometer, 358 

 Regulation of transpiration, 302-303 

 Relation between photosynthesis 



and the yield, 210-211 

 Renner, 333 



Reproduction phases, 437-440 

 Requirement in cold, 131 

 Reserve proteins, 50-54, 59, 76 

 Resistance, cold, 350-352 



drought, 370-372 



frost, 352 * 



salt, 378 



winter, 358-361 



of wood to ascent of water, 334- 

 336 

 Respiration, anaerobic, 96-97 



and chemosynthesis, 181-182 

 Respiration enzymes, 98-100 

 Respiration pigments, 104 

 Respiratory quotient, 89-90 

 Reversibility of enzymatic reactions, 



64-65 

 Rhizocaline, 403 

 Ringer, 140 



Ringing, 321-322, 402-403 

 Ripening, of fruit, 409-412 



of seeds, 442-445 

 Robertson, 122-123 

 Root hairs, 289 

 Root pressure, 283-285 

 Root system of plants, 279-282 



RUHLAND, 26 



Rule, Gibbs', 26 



Rule of Hardy, 7 



Rule of van't Hoff, 91-92, 204-206 



S 



Sabinin, 27 



Sachs, 119, 121 



Sachs' method, 166-167 



Sachs' test, 147, 162 



Salt resistance of crop plants, 382 



Salt solutions, toxicity of pure, 139- 

 142 



Salts, physiologically acid and alka- 

 line, 224 



