SUBJECT INDEX 



683 



Carbon dioxide, role in photosynthe- 

 sis, 341-347 

 Carboxylase, 531, 544 

 Carotene, 315-316, 317, 385 

 Carotinoids, 307-308, 315-316 

 Casparian strip, 275 

 Catalase, 535-536 

 Catalysts, 462, 464-465 



role of mineral elements as, 417, 



423 

 Cataphoresis, 46-47, 75 



Cathode, 1 1 



Cation exchange, 404-406 



Cations, 12 



in the soil, 249, 404 

 Caulocaline, 583, 622 

 Cell, see plant cell 

 Cell division phase of growth, 269, 



553-555 



Cellobiase, 470 



Cellobiose, 374, 376 



Cell sap, 61, 79 

 pH of, 79, 80 



Cellulase, 374, 470 



Cellulose, 29, 65-68, 375-376, 554, 

 556 



Cell walls, 64-68 



permeability of, 118, 126-127, 

 207-208 



Chemical reaction theory of perme- 

 ability, 1 30-1 3 1 



Chilling injury, 591-592 



Chitin, 70 



Chlorenchyma, 157, 158, 320, 482 



Chlorine, role of, 426 



Chlorophylls, 307-312 



role in photosynthesis, 327, 360-361 

 synthesis of, 312-315, 585-586 



Chlorophyllogen, 313 



Chloroplast pigments, 307-308 

 quantities in leaves, 316-317 

 role in photosynthesis, 327-328 



Chloroplasts, 77, 175 

 and photosynthesis, 327 

 and starch synthesis, 323, 378 



Chlorosis, 312, 412, 422, 423, 424, 

 428, 429 



Cholesterol, 396 



Chromogen theory of respiration, 



545-546 

 Chromoplasts, 77, 308 

 Chromoproteins, 447 

 Clay fraction of soils, 246-247, 403- 



406 

 Coagulation of protoplasm, 74, 595- 



596 _ 

 Coagulation of sols, 48 

 Co-enzymes, 476 

 Cohesion (cohesive force) of water, 



24, 233-234, 236-238 

 Cohesion theory, 233-236, 243, 277- 



278 

 Cold resistance, 591-594 

 Coleoptile, 478, 572, 630 

 Coleorhiza, 478, 629 

 Collenchyma, 64, 482 

 Colloidal systems {see also gels and 



sols), 32-36 

 Colloids in the soil, 247, 249, 403- 



406 

 Coloration of leaves, autumnal, 385- 



386 

 Companion cells, 483, 484, 485 

 Compass plants, 655 

 Compensation point, 515-517 

 Condensation reactions, 323, 373, 



375, 392, 394-395, 443, 549, 



554, 



Conduction of solutes, see transloca- 

 tion of solutes 



Conduction of water, see movement 

 of water 



Conduction, thermal, 196-197 



Convection, 86, 196, 200 



Copper, role of, 424-425 



Cork cambiums, 224, 272, 486 



Correlations, 617-619, 651 



Cortex, 219, 270, 271, 650 



Cotyledon, 625, 626, 627-630 



Cryoscopic method, 103-104, 138 



Crystalloids, 35 



Cuticular transpiration, 156, 159, 

 202, 301 



Cutin, 69, 158-159, 202, 396 



