262 



GROWTH HORMONES IN PLANTS 



LaRue, C. D., 102, 121, 129 

 Lathyrus, 66 

 "Lazy" maize, 197 

 Leaves, abscission of, 129 

 bud inhibition by, 118 

 growth substance and normal 



growth of, 93-95, 94 

 occurrence of growth substance 

 in, 59 

 LaFanu, B., 122 

 Lek, H. A. A. van der, 124 

 Lemons, 62 

 Lentils, 62 

 Lepidium, 188, 202 

 Letellier, M. A., 184, 209 

 Lettuce, 135 



{See also Lactuca) 

 Li, T.-T., 58, 149, 151 

 Light, absorption of, in tissues, 131^. 

 destruction of growth substance 



by, 93 

 efifect upon growth substance 



activity, 65, 96 

 formation of growth substance 



by, 65, 96 

 in hormone test laboratory, 17 

 phototropic effectiveness of, 135 

 sensitivity of coleoptile to, 3, 



133-135, 4, 136 

 transport of growth substance, 

 effect upon, 77 

 Light-gradient and phototropic cur- 

 vature, 131-132 

 Light-growth reaction, in Avena 

 coleoptile, 87-88, 93, 87 

 in hypocotyls, 95, 97 

 Ldgustrum, 124 

 Linsbauer, K., 16, 217 

 Linseed oil, 47, 63 

 Ldnum, 164, 188 



Lipase, effect upon peanut oil, 63 

 Liverwort, tested for growth sub- 

 stance, 63 

 Loeb, J., 119, 124, 189-190, 191 

 Lolium, 161, 198 



Lower plants, effect of growth sub- 

 stance on, 103, 122 



Lower plants, formation of growth 

 substance by, 64 

 occurrence of growth substance 



in, 62 

 significance of growth substance 

 for normal growth of, 101-102 

 Lundegardh, H., 87, 131, 142, 143, 



144, 147, 202 

 Lupinus, 60, 65, 75, 97, 99, 103, 109, 

 189, 192, 197, 203, 204, 214, 216 

 Luxburg, H., 203 

 Lycopersicon, 53, 102 

 {See also Tomato) 



M 



McAlister, E. D., 135 



Mai, G., 75, 103, 119, 129 



Maize, 100, 203 

 {See also Zea) 



Maize oil, 46, 62, 63 



Majima, R., 47 



Malt, occurrence of growth sub- 

 stance in, 12, 46, 62, 63 



Marigolds, 53 



Maschmann, E., 15, 61, 62, 63 



Maximum angle, 32 



Measurement, comparison of units 

 of, 33-34, 33 

 protractor, use of, 31 

 recording of, automatic method, 

 32 

 shadow picture, 32 

 units of, AE, 33 

 d-value, 28, 29, 28 

 plant unit, 32 

 unit, 32 

 T^ieia-unit, 36 

 WAE, 29 



Mechanism of growth substance 

 action, 103-115 



Meesters, A., 100, 215 



Mentha, 190 



Meristine, 119 



Merkenschlager, F., 66, 101 



Mesocotyl (first internode), environ- 

 ment and elongation of, 17 



