INDEX 



267 



Test methods: 



ylj;erta-coleoptile techniques, 16- 



32 

 callus-forming test, 35, 36 

 pea test, 34, 36 



for root-forming substances, 126 

 (See also Techniques) 

 Test objects, Avena, culture condi- 

 tions, 16-17 

 culture methods, 18-20 

 curvature, negative, 23 

 positive, 23 

 rapidit}^ of, 22 



relation to concentration, 32, 

 28 

 preparation for use, 20-23, 21 

 varieties used, 16, 17 

 Cephalaria, 37 

 Coleus, 25 



comparative sensitivity of. 37, 38 

 comparison of, 36-38, 38 

 how to grow, 16-20 

 Lycopersicon, 53 



(See also Tomato) 

 marigold, 53 

 Nicotiana, 53 

 Pkaseolus, 25 

 Pisuni, 34 

 stocks, 53 

 Tetley, U., 90, 162 

 Thigmotropism, 213 

 Thimann, K. V., 26, 27, 29, 31, 32, 

 41, 57, 59, 60, 62, 64, 74, 75, 79, 

 90, 96, 101, 104, 105, 112, 115, 

 118, 126 

 Thoday, D., 122 

 Tissue culture, 102 

 Tobacco, 79, 123 



(See also Nicotiana) 

 Tomato, 53, 62, 79, 123 



(ASee also Lycopersicon) 

 Tonnis, B., 63, 102 

 Tradescantia, 60, 103, 119, 124, 198 

 Translocation of growth substances 



(see Transport) 

 Transport of growth substance, from 

 agar into coleoptile, 79 

 amount of, 73, 74, 79 



Transport of growth substance, 

 anesthesia, effect of on, 74 



from buds, 75 



in coleoptile, 11, 71-74 



against concentration gradient, 72 



by diffusion, 76 



direction of, 75 

 (See also Polarity) 



by electrophoresis, 78-79, 183, 194 



in hypocotyls, 75 



intensity of, 80 



in leaves, 75 



light, effect of upon, 77, 155-159 



mechanism of, 76-79 



in parenchyma, 71, 30 



pathways of, 71, 76 



in petioles, 75 



polarity of, 72, 75-76 



by protoplasmic streaming, 76-78 



rate of, 73-74 



rate per hour, 74 



in roots, 75-76 



in shoots, 75-76 



by surface tension, 78 



temperature upon, effect of, 74 



transpiration upon, effect of, 76, 79 



in vascular bundles, 71, 30 



X-irradiation, effect of upon, 74 

 Traumatotropism, 213-219 



by amputations, 214, 218 



by chemical treatment, 215 



course of curvature during, 214 



growth-substance explanation of, 

 218-219 



by incisions, 214, 218 



stimulus transmission during, in 

 Avena, 215-216 

 in Mimosa, 216-217 

 in roots, 216 

 Triticum, 57, 62, 87, 198 

 Tropaeolum, 164 

 Tropo-horinones, 151-152 

 Tryptophane, and other amino acids, 



70 

 Tumors (animal), growth substance 

 in, 63 



growth substance and production 

 of, 119-121 



