450 



SUBJECT INDEX 



Botryiis: 197 



fungicidal action of pentathionio acid, sulphuric 



acid and hydrogen sulphide on spores, 303- 



366 

 Boyce Thompson Institute for Plant Research: 



aims and scope of work, 6-8 

 development and organization, 1-S 

 founder, 1-6 

 Brassica, 35, 36, 37 

 Brassica rapa, 332 

 Brauneria sp.: as insecticide, 354 

 2-Bromo-3-nitrobenzoic acid, 223 

 Bromus, 36, 38 

 Bryophyllum: 255 



effects of ethylene chlorohydrin, light, on citric 



acid content, 250 

 Buckwheat: studies of artificial light effects on dry 



weight, 293-309 

 Bud inhibition: delayed flowering of fruit trees, 216 

 of potato tubers by methjl a-naphthaleneacetate, 



216 

 Buds: dormancy, 230-256 

 Buffers: factors influencing pH equilibrium of plant 



tissue, 414-118 

 Bunt of wheat: method for evaluating fungicides, 379 

 Buried seed project: Beal's, 36-39 



of U.S.D.A., 34-36 

 Bursa, 36 



Butane: injury to plants, 179-180 

 Butomus, 90 

 Butomus umbeUatus, 101 



Butylene: physiological effects on plants, 142-143 

 Butylene effects: on roots, 173 



Calceolaria, 308, 309, 338 

 CaUistcmon, 33 



Calochortus macrocarpus: dormancj- and germina- 

 tion of seeds, 127 

 Camassia Leichtlinii: dormancy and germination 



of seeds, 127 

 Camellia: as affected by growth substances, 212,214 

 Campanula, 42, 43 

 Canavalia, 30 

 Cankerworm: control by banding, wind dispersal, 



355-356 

 Capillary glass electrode: determination of pH, 437 

 Capsella, 42, 43 

 Carbohydrate nitrogen ratio: 285 



effect of artificial light on plant composition, 311- 

 312 

 Carbohydrates: changes in leaves during night, 409, 

 412 

 effects of artificial light on plant composition, 



311-312 

 effects of carbohydrate reserves on growth of 

 seedlings, 436 

 Carbon dioxide: physiological and biochemical 

 effects on fruits, seeds, vegetables and 

 flowers, 398-408 

 Carbon dioxide concentrations: effects on plant 



growth, 286-290 

 Carbon dioxide effects on: acidity of plant tissue, 

 400-403 

 aquatic plants, 23 

 ascorbic acid content of fruits and vegetables, 



400-408 

 flower color, 403 

 fungal hyphae, 401-403 

 germination of lettuce seeds, 399-400 

 potato tuber dormancy, 400 

 respiration rate of plant tissue, 403—106 

 vitality: (See Vitality of seeds) 

 Carbon dioxide storage effects on potato tubers: 



reducing sugar, 395-397 

 Carbon disulphide effects on: dormant potato 

 tubers, 234 



Carbon monoxide: physiological effects on plants, 



142-143, 152-154, 160-164 

 Carduus, 35 

 Carica, 44 

 Carya, 90 

 Cassia, 29, 35 



Catalase: changes in relation to respiration rate, 249 

 Catalpa, 148 



Caulophyllum thalictroides: dormancy and germina- 

 tion of seeds, 120-121 

 Cdastrus, 90 



Cell membrane studies, 260-283 

 Cellulose: bacterial"studies, 263-264 

 detection in fibers, 271 

 formation of membranes, 264-273 

 formation of particles, 273-282 

 in Avena coleoptile epidermis, 270-273 

 microscopic techniques used for analyzing bac- 

 terial membranes, 264-270 

 separation of particles by hydrochloric acid, 268- 



270 

 studies, 260-283 

 Celtis, 90 



Ceratophyllum, demersum, 15 

 Ceratostomella ulmi, 197 

 Cercis, 73 

 Chaerophyllum, 42 

 Chaetochloa, 35, 36 

 Chamaesyce, 36, 38 

 Chara, 21, 22, 24, 25 

 Chelidonium. , 42 



Chemicals: as forcing agents for dormant seeds, 131 

 effect of, on permeability of dormant potato 

 tubers, 251 

 Chenopodium, 34, 35, 40, 42, 43 

 Cherry: effects of illuminating gas on roots, 173 

 Chionanthus virginiana, 118 

 Chlorinated water effects on: goldfish, 194-196 



plants, 194-196 

 Chlorine effects on: plants and animals, 194-200 

 Chloris, 75, 76, 109 

 2-Chloro-3,5-diiodobenzoic acid, 223 

 2-Chloro-5-nitrobenzoic acid, 223 

 2-Chlorophenoxyacetic acid, 209, 218 

 3-Chlorophenoxyacetic acid, 209 

 4-Chlorophenoxyacetic acid, 209, 218 

 a-(2-Chlorophenoxy)-?i-butyrio acid, 209, 218 

 a-(3-Chlorophenoxy)-n-butyric acid, 209, 218 

 a-(4-Chlorophenoxy)-n-butyric acid, 209, 218 

 a-(2-Chlorophenoxy)-propionic acid, 209, 218 

 a-(3-Chlorophenoxy)-propionic acid, 209, 218 

 a-(4-Chlorophenoxy)-propionic acid, 209, 218 

 Chlorophyll: artificial light effects, 295 

 effect of light on concentration, 328 

 Chlorophyll pigments: effect of environment, 330- 



331 

 Chrysanthemum, 35 



Chrysanthemum cinerariaefolium: {See Pyrethrum) 

 Chrysanthemum leucanthemum, 11 

 Cicadula sexnotata: aster yellows carrier, 1 1 



hosts, 11 

 Cinchona: 52 



pollen storage, 429-430 

 Cinnamic acid, 207 



Cinnamic acid, irradiated: applied as a vapor pro- 

 duces epinasty in plants, 226 

 Cirsium, 40 

 Cissus aerial roots: inhibition by a-naphthalene- 



acetic acid, 216 

 Citric acid in potato tubers: changes in relation to 

 respiration rate, 249 

 effects of ethylene chlorohydrin on, 248-249 

 Citrus: moisture effects on vitality of seeds, 31-32 

 Coccomyces hiemalis: origin of ascocarp, 436 

 Cocklebur: primary and secondary dormancy, 

 47-48 



