INDEX 



355 



Pressure (see also negative pressure), in tissues, 145. 

 251; as stimulus, 303, 304; developed in grow- 

 ing roots, 304, 305; negative, in stems, 106; 

 pressure, wounding and traction, influence of, 

 on growth and configuration, 300-305 



Prianischnikow, see Prianishnikov. 



Prianishnikov, on fertilizers, 94, 95, 96; P. and 

 Shulov, on asparagin formation, 177 



Priestley, on gas exchange, 2, 3; on photosynthesis, 

 210 



Pringsheim, E., Reizbewegungen, 253, 311, 312, 

 316 



Privet, 36, 221 



Pro-chromogen, 223 



Profile position, of leaves, 278 



Prolin, 160 



Propagation, vegetative, 334 



Protamins, 162 



Proteinaceous seeds, 190 



Proteins, 155-163; determination of, 156, 157; struc- 

 ture of, 150-163; synthesis of, 31, 38, 85, 170, 

 171, 178-181, 189; transformations of, 173; 

 transfer of, 149; hydrolysis and decomposition 

 of, 159-161, 166, 169, 170-174, 175-179, 185; 

 191, 200, 227; nitrogenous products of, 175- 

 178; in leaves, 284; in Plasmodium, 154; in 

 sap, 142; in seeds and seedlings, 184, 191, 192; 

 in soil, 67; in root tubercles, 75, 76; with 

 magnesium, 85; in respiration, 227—229 



Proteolytic enzymes, 166, 176, 185 



Proteose, 158 



Protochlorophyll, 18 



Protonema, luminous, 27 



Protophyllin, 13, 14 



Protoplasm, alkalinity of, 189 



Protoplasmic membranes, 106, 119 



Prunus, 35 



Prussian blue, 179 



Psalliota, 222 



Pteris, 302 



Pulling and Livingston, on water relations, 272 



Pulvinus, of Mimosa, 317, 318 



Pumice, 82 



Pumpkin, 217, 313 



Pure cultures, 43, 56; of root-tubercle bacteria, 76; 

 of yeast, 59 



Purievich, on photosynthesis, 25; on transfer of 

 organic materials, 150; on decomposition of 

 organic acids in plants, 188, 210; on respiration 

 ratio, 210; on respiration, 213 



Puriewitsch, see Purievich. 



Purin, 162, 163; bases, 175 



Pyrenees, 324 



Pyrimidin, 162, 163 



Pyrogallol, 4, 31, 226, 259 



Pyrrol, 12, 160 



Pyrrophyllin, 13 



Quartz, 82, 167 

 Quinin, 38, 226 

 Quinone, 199, 225 



R 



Rachis, 317 



Radiant energy, 14-17, 138, 



190 



Radium, 169 



Raffinose, 17 



Rajlesiacew, 47 



Ranunculus, 265 



Raphides, 299 



Rapp, see Albert, Buchner and R. 



Raulin, on nutrient media, 46, 87 



Reaction time, 294 



Receptive movements, 316 



Reducer. 207 



Reductase, 168, 207, 208, 226 



Reduction, 168, 207, 208, 225 



Reductor, 207 



Reed, on transpiration and chemicals, 139. (See 



also Schreiner, R. and Skinner.) 

 Regnault, calorimeter, 219; on carbon assimilation, 



3 



Regulation, of enzyme action, 170 



Reid, see Livingston, Britten and R. 



Reinhardt, and Sushkov, on starch formation, 38. 



(See also Zaliesskii and R.) 

 Reinitzer, on respiration, 210. (See also Curtius 

 and R.) 



Reinke, on chlorophyll decomposition, greening, ' 

 photosynthesis and light, 23; on photosyn- 

 thesis, 30, 154; Theoretische Biologie, 154 



Renard, see K16ment and R. 



Renner, on osmotic solutions, 113; on transpira- 

 tion, etc., 1, 5, 138, 145, 147 



Reproduction, 331-336; and development, 322-336 



Reserve materials, 157, 158, 162, 185, 190, 229 



Resin, 106 



Respiration (see also combustion, oxidation), xxviii, 

 38, 104, 168, 169, 171, 182, 184, 197, 198, 203, 

 210-215, 258, 259, 284; apparatus for measur- 

 ing, 215-217; anaerobic, 220-222; and fer- 

 mentation, Pt. I, Chap. VIII, 198-232; forma- 

 tion of water by, 217-218; liberation of heat 

 by, 218-220; materials consumed in, 227-230; 

 special cases of, 230-232; chromogens, 188, 

 222-223, 224, 226; enzymes, 222-223, 225, 226, 

 229, 230; pigments, 207, 233-226;, ratio, 204, 

 210, 212-214, 219, 220 



Resting cells, 155; period, 257 



Reversibility of enzyme action, 168 



Rhone river, 55 



Rhizomes, 327 



Rhodophyllin, 13 



Rhus, 166, 223 



Rhythm, 275 



Ribbert, on transplantation and hormones, 329 



Ricinus, 183, 191 



Richter, A., see Rikhter. 



Richter, O., on microchemical analysis, 90; on 

 poison gases and geotropism, 297 



ki. -smaller, on ash analyses, 89, 90 



Rigg, on bog water, 101 



Rigidity, and tissue strains, 251 



Rijn, van, on glucosides, 181, 187 



Rikhter, A., on photosynthesis and light, 25; on 

 death by freezing, 211; on zinc and copper in 

 Aspergillus nutrition, 87 



Ripening, of potato tubers, 185 



Rischavi, on respiration, 214 



Ritter, on denitrifying organisms, 79; on giant 

 cells of Mucor, 270, 300 



Robinia, 27, 77 



