372 



INDEX 



Bacteria, in nodules, 59-63 



sulphur, 256-257 

 Bacterial fertilization, 62 

 Bacteriods, 61 



Baeyer, on photosynthesis, 29 

 Balanced solutions, 74-76 

 Bertrand, on catalytic fertilizers, 



309 

 Biuret reaction, 220 

 Blaatjw, on phototropism, 321 

 Blackman, on assimilation, 46 



on growth formula, 282-283, 297 



on limiting factors, 85 

 in assimilation, 47-48 

 Bleeding of plants, 136-139 

 Bogdanov, on water relations, 146- 



147 

 Bonnier, on development, 304 

 Borodin, on respiration, 275 

 Bose, on crescograph, 280 



on water relations, 195 

 Bourquelot, on enzymes, 214 

 Boussingault, on asparagine, 226 



on loss of substances in germinating 

 seeds, 248 



on nitrogen absorption, 51 

 Boysen-Jensen, on phototropism, 



319 

 Briggs and Shantz, on transpira- 

 tion, 178 



on unavailable water, 145-146 

 Brown and Escombe, on decompo- 

 sition of carbon dioxide, 31 



on stomata in carbon assimilation, 

 35 

 Browner, on tropisms, 328 

 Brunov, on development, 306 

 Buchner, on fermentation, 262-264 

 Budding, 362-366 

 Buder, on phototropism, 321 

 Buffer action, of soil solutions, 98 

 Butyric-acid fermentation, 266-267 



C 



Cacti, 174-175 



Calciophiles and calciophobes, 93-94 



Calcium, role in metabolism, 74 



Callus formation, 361-362 

 Capillary water, 144 

 Carbohydrates, products of hydroly- 

 sis of, 202-206 

 types of reserve, 202-206 

 Carbon, absorption, 6-49 



assimilation, importance of light 

 in, 25-26 

 organs of, 17-18 

 products of, 13-17 

 relationship to stomatal open- 

 ings, 35-36 

 source for plants, 6-11 

 Carbon dioxide, absorption by leaf, 

 34-37 

 cycle in nature, 43-45 

 fertilization with, 44 

 Carotin, 21 

 Catalase, 30 

 Cations, 71-74 



Cell, accumulation of substances in, 

 119-123 

 as colloidal system, 107-112 

 growth of, 284-288 

 osmotic properties of membrane of, 



107-112 

 as osmotic system, 101-127 

 Cell sap, osmotic properties of, 112— 



116 

 Cellulose, 204 

 Chemosynthesis, 25-26 

 Chemotropism, 329-332 

 Chimeras, 362-366 

 Chlorophyll, 18-21 



absorption bands of, 27 

 absorption spectrum of, 26 

 chemical structure of, 19-20 

 fluorescence, 27-28 

 formation, 21 24 

 pigments accompanying, 21-22 

 properties of, 18-21 



optical, 26-31 

 relation to light absorption, 26-31 

 selective absorption of, 33 

 Chloroplasts, reduction of carbon 



dioxide in, 28 

 Chlorosis, 22-24, 97 

 induced by calcium, 80 



