Index 



353 



Solubility of auxins, 189, 191, 197, 283 

 Soybean, 147, 260 



Spatial configuration, anti-auxin activity, 

 160 



auxin activity, 159 

 Spectiographic assay, 50, 53, 68, 138 

 Spikelets, supernumerary, 291 

 Spinach, 76 

 Spores, 300 

 Sprays, 114, 191 



acidity of, 189 



airplane, 237, 246 



application rates, 286, 288 



droplet size, 150, 280 



light effects, 150 



movement as factor, 119 



placement, 246 



wettability of leaves, 280 

 Squash, 221 

 Stability to acid, 7, 69 

 Standard deviation, 26 

 Standard error, 26, 37, 40 

 Starch hydrolysis, 130 

 Stearic acid, 191 

 Stem-reference readings, 33 

 Steric hindrance, 171 

 Sterility, male, 260 

 Steroids, 181 

 Stomata, 137 

 Storage quality, 272 



apples, 249 



citrus, 251, 263, 273 



trees and shrubs, 270 

 Straight-growth tests, 34, 35, 37, 53, 58 



ethylene effect, 174 



guillotines for, 34 



sensitivity to metals, 39 



use in chromatography, 38 

 Strawberry, 76, 294 

 Streaming, protoplasmic, 95 

 Streptomycin, 300 

 Suckering, tobacco, 301 

 Sugars, 132, 205 



flowering effect, 254 



growth effects, 38, 40 



light effect, 91 



role in movement, 143 



rooting effect, 204, 213 

 Sugar, beet, 253, 260 



cane, 92 

 Simflower, 63 

 Sulfamates, 293 

 Sulfhydryl compounds, 179 



competitors of, 163 



enzymes, 182 



role in dormancy, 267, 300 



Supernumerary spikelets, 291 

 Susceptibility, 277 

 Sweet potatoes, 271 

 Synergism, 80, 152, 162 



in rooting, 207 



maleic hydrazide, 172 



of indoleacetonitrile, 158 



phthalamic acids, 219 



with antibiotics, 300 

 Synapsis, 76 



Synthesis of auxin, see Formation 

 Systemic fungicides, 174, 299 



Tagetes, 81 



Talc, 191, 208, 268 



Temperature, abscission effects, 248 



auxin extraction, 16 



flowering effects, 261 



pea growth effects, 38 

 Tests, see also Color tests 



acidity, 49 



Avena, 18, 58 



cress root, 53 



ferric chloride, 58 



fluorescence, 53 



Hopkins-Cole, 50 



leaf repression, 43, 5H 



pea root, 39, 53, 58 



root inhibition, 41, 58 



slit pea, 58 



spectrographic, 50 



straight-growth, 34, 53, 58 



tomato ovary, 45, 58 

 Therapeutic uses, 299 

 Thigmotropism, 100 

 Thinning fruit, 232 

 Thiol ester, 180 

 Thiourea, 268 

 Thistles, 288, 292 

 Tillering, 101, 277 



Tobacco, 16, 17, 73, 76, 103, 105, 109, 130, 

 132 



epinasty, 121, 174 



flowering, 253 



fruit set, 215 



parthenocarjDy, 221 



suckering, 301 



mosaic, 228 

 Tolylphthalamic acid, 219 

 Tomato, 16, 70, 111, 113, 147 



epinasty, 121, 122, 174, 287 



fruit growth rate, 126, 220 



fruit set, 11, 126, 174, 193, 217, 221 



mitochondria, 179 



rooting, 210 



seed treatment, 261 



