466 Subject Index 



Star formation (continued) 



in neiiro])lastic cells, 66, 70, 72 



oriented c-metaphase, 36-40 



in Triton, 40, 81-83 



in Triturus. 40, 43, 81-83 



types, 38. 43, 81 

 Star metaphases, 36, 38, 39, 40, 43, 66, 

 67,70,71,72,73,81,82,83 



mnltiple, 83, 84 

 Starch. 220 



action on mitosis. 221 



cliastatic activity and colchicine, 131 



digestion of, 131 

 Stathmokinesis, 67, 86 



arrested metaphases, 24 



defined, 24 



fidl inacti\ation, 86 



index of, 224 

 Steatosis, 191 

 Steel rye, 319, 366 



antotetraploids, 319 



in Sweden, 319, 364 

 Sterile hybrids, 278. 363; see also 

 Fertilit\ 



made fertile, 278, 362, 384 

 Steroid hormones, 418 

 Stilbestrol, 227 

 Stilbylamine, 413 

 Stipa, 302 



Stomach epithelium, 409 

 Stomatal cleyelopment, 128-29 

 Stress, 177, 190, 193, 248, 262 

 Striated muscle, 180 

 Stropharia nierderia. 123 

 Strophosomy, 207-8 

 Strychnos arhorea, 413 

 Siibcompactoid wheat, 357 

 Sid)microscopic structure, 74, 75, 127, 



128 

 Sidjstances from Colchicuin, 144, 154 



B, 144 



C, 144, 147, 172 



colchicine, 144-47 



D, 144-46 



deriyati\es and mechanism of 

 c-mitosis, 404-11 



E, 144-46 



F (Demecolcin) , 143, 144-47, 154 



I, 144-16 

 Substituted thromosomes, 300 



in Xicotiano, 358, 307-8 



nidlisomics of wheat, 357 



rye for wheat, 300 

 Sucrose agar media, 386 

 Sucrose production, 332 



percentage, 332 



of tetraploids increased, 368 



in triploid beets, 332 



in watermelon, 368, 417 

 Sugar beets, 139, 331 



anatomical changes, 139 



impro\ement, 331 



triploid, 331-33 

 Sugar cane, 279 

 Sulfanilamide, 418 

 Sulfhydr\l groups, 403 

 SidflnihAl poisons, 411 

 Sidfonamide, 104 

 Sunlight, 154, 170 



effect on colchicine, 154 

 Super contraction, 85, 113 



autonomous, of c-mitosis, 46 



cpair contraction, 37, 43, 47 



chromosome eyolution, 46-48 



maximum contraction, 44, 47 



pretreatment of, 48 



threshold for, 46 



thickness and shortness, 52 

 Supralethal dose, 34 



in rats for maximum arrested 

 metaphase, 34, 44 

 Surface changes in eggs, 202 

 Surinjan, 3, 12 

 Svalof, 274 



chromosome laboratory, 286 



experiments, 284 



Hilleshog strain of beets, 355 



Swedish 'botanists, 274-310 

 Sweden, 274, 286, 287, 322, 355, 382 

 Synapsis, 277 



chiasmata. 115 



of hybridity, 277 



meiosis, 112 



pairing of chromosomes, 112 

 Syndrome, adaptation. 192 

 Synergism, 105, 217, 416 



role of colchicine, 105 

 Synergists, 396, 418 

 Synsiplion. 8 



Tachysterin, 235 

 Tagetes patula, tumors in, 266 

 Tail, regeneration of, 242 

 Taraxacum hohsagliyz, 368 

 Tautomeric enol system, 160, 168 

 Tautomerides, 168 

 Techni(|ucs of colchicine treatment, 

 373-90 



Allium cepa test, 27, 28, 34, 41, 79, 385 



in animals, 373-83 



Arbacia, 75 



birefringence tests. 89 



chemical methods of extraction, 153, 

 154, 159 



chromosome studies, 386 



corneal cells, 43 



effectiveness, 76, 131-32, 383, 404 



egg, at second maturation division. 381 



embryo sac, 118 



embryonic growth, 202-10 



