268 



TRANSLOCATION IN PLANTS 



Hexose, radial distribution of, 192- 

 194 

 as storage sugar, 192, 195 

 as transport sugar, 188, 189 

 Hormones, controlling translocation, 

 106, 130, 131, 241 

 direction of movement, 187, 213- 



215 

 and growth responses, 130, 219, 



223, 237-239, 241, 250, 251 

 method of transport, 187, 214-217 

 rate of transport, 215-217 

 transport, through companion 

 cells, 187 

 independent of protoplasmic 



streaming, 215, 216 

 through parenchyma, 187, 216 

 through phloem, 99, 100, 131, 



187, 214, 219, 251 

 a vital process, 215 

 through xylem, 97, 98, 100, 251 

 Hypotheses of transport through 

 phloem {see Mechanism of 

 transport through phloem) 



Injection, into phloem, 111, 112, 218 

 and transport through xylem, 5, 

 101, 104, 105 



Klling, effect on absorption or 

 translocation, 77, 78, 82, 84. 

 88, 113, 221, 222 



Latex system, 134, 147 



effect of temperature on exuda- 

 tion from, 226 

 and translocation, 42 

 Leakage, of nitrogen and salts into 

 xylem, 52, 62-64, 78, 81-86, 

 123, 124, 200 

 from phloem, 170, 171, 174, 227 

 of sugar into xylem, 118, 119 

 (See also Exudation) 



Lithium, in translocation studies, 80, 



88-94, 113-115, 185 

 Living cells, and absorption of 

 fluorescein, 204, 217, 227 

 and transport, 78, 79, 88, 138, 178, 

 220-228 

 of growth substances, 215, 216 

 of viruses, 210 

 Loss of nitrogen etc. from tissues, 

 before abscission, 158, 218, 220- 

 222, 242 

 as influenced, by age, 62, 63 

 by carbohydrate content, 52, 



62-64, 81, 82, 123 

 by light, 44, 62, 70, 73, 206, 211 

 by rains, 49 

 by ringing (see Trapping) 



{See also Absorption, reten- 

 tion or loss) 



M 



Mechanism of transport through 

 phloem, 9, 56, 133-228 

 adsorption hypothesis of Mang- 



ham, 142, 143 

 different for different substances, 



209, 210, 228 

 inadequacy of suggested, 178 

 pressure flow hypothesis, of Crafts, 

 164-166 

 {See also Crafts) 

 of Munch, 143-146 

 {See also Munch) 

 protoplasmic streaming and dif- 

 fusion hypothesis, 174-178 

 (See also Protoplasmic stream- 

 ing and diffusion) 

 surface film hypothesis of Van den 

 Honert, 143, 202-204, 208, 

 209, 222, 228 

 Methods, of determining composi- 

 tion changes {see Composition 

 changes) 

 tissues of transport, 4, 5, 8, 44, 

 109-131 

 of movement through phloem, 

 133-238 



