INDEX ■ 



259 



Extraction of growth substance, 

 from pollen, 25 

 into agar, 25 

 into dextrose-agar, 25 

 into water, 26 

 from roots, 25, 26 

 with water, 27 



F 



Fagus (see Beech) 



Feces, 121 



Ficaria, 214 



Filzer, P., 135 



Fischnich, O., 35-36, 103, 119, 123, 



124, 126 

 Fitting, H., 2, 7, 10, 15, 61, 135, 



161, 216 

 Flint, L. H., 135 

 Fliry, M., 60 



Flour, growth substance in, 63 

 Flower stalks, growth substance and 



normal growth in, 97-98 

 Follicle hormone, 64 

 Foods, effect of, on growth-substance 



production, 67-69 

 Formation of growth substance, 

 effect on, of aeration, 64 

 of erythrosin, 66 

 of ethylene, 66, 74 

 of foods, 67-69, 68 

 of light, 65 

 of substrate, 42, 64 

 of temperature, 64, 66 

 of x-rays, 65, 66 

 in endosperm, 90 

 during geotropic curvature, 198 

 in grass nodes, 60, 66 

 by higher plants, 65-67, 97 

 in leaves, 65, 75, 93-95, 94 

 by lower plants, 64 

 in seedhngs, 65, 97 

 in urine, 67-69, 68 

 Forsythia, 117 

 Froschel, P., 139 



Fungi, growth substance in, 40, 41, 

 49, 62, 63, 64, 126, 129 



G 



Galium, 164 



Gamma, definition of, 36 

 Gases, effect of, of nastic move- 

 ments, 124 

 on rooting, 127, 125 

 Geoelectric potential, 182-185 

 Geo-growth reaction, in Avena 

 coleoptile, 88 

 in roots, 202-203 

 Geotropism, and acidity, 195 



in Avena coleoptile, 171-188, 13, 



174 

 comparison with photo tropism, 



185-186 

 course of curvature, 175-178, 176, 



177 

 definition of, 169 



in dicotyledonous shoots, 188-199 

 distribution of sensitivity, 171- 



173, 188-189, 199-200 

 dyes, effect of, 101 

 early history of, 169-171 

 electrical theories concerning, 182- 



185, 196, 194 

 ethylene, effect of, 192 

 explanation of, electrical theories, 

 182-185, 196, 209-210, 194 

 growth-substance, 178-181, 189- 



196, 203-205 

 statoUth theory, 181-182 

 inheritance of, 196-197 

 in internodes, 197 

 locahzation of sensitivity, Avena, 



173 

 in maize, 197 



negative in stems, 189, 193 

 in nodes, 197-199 

 pathway of stimulus conduction, 



173, 200-201, 174 

 quantity-of-stimulus principle in. 



174-175, 201-202 

 rates of growth during, 175-177, 



202-203, 176, 177 

 recovery from, 186-188 



