270 



TRANSLOCATION IN PLANTS 



Phloem, exudate, concentration of, 

 161, 164, 180, 181 

 volume of, 135 

 exudation from {see Exudation) 

 injection into, 104, 109-112, 133- 



136 

 internal, 8, 100, 235 

 method of transport in, 133-228 

 {See also Mechanism of trans- 

 port) 

 pecularities of, 133-136 

 polar movement in, 198, 206, 213- 



215, 217 

 pressures in, 134, 161, 180 

 rates of transport through, 88, 90, 

 92, 94-96, 136, 168, 178, 181, 

 194, 195, 217, 218 

 transmission through, 223, 237- 



239 

 unidirectional movement in, 57, 

 136, 138, 139, 143, 149, 170, 

 186, 200, 210, 218-220, 245 

 water movement in, 90 

 Pith, translocation by, 7 

 Plasmodesma, distribution of, 141, 

 205 

 movement through, 139-142, 145, 



170, 172, 184 

 and movement of hormones, 216 

 movement of protoplasm through, 



139, 141, 142, 163, 183, 218 

 nature of, 184 

 and passage of viruses, 184 

 and permeability to solutes, 139, 



141, 145, 147, 173, 195 

 pressures necessary to cause flow 



through, 150, 183 

 and transport of fluorescein, 205 

 Plugging, of sieve tubes, 161, 162, 

 178, 226 

 of xylem, as result of ringing, 27, 

 36, 43, 53, 94, 100, 103, 104, 

 125-131 

 tests for, 125-129 

 Pressure, in blood capillaries, 161 

 and flow, through phloem, 133, 

 134, 143-146, 150 

 through plasmodesma, 150, 183 

 through walls, 164-167 



Pressure, and flow, through xylem, 

 133 

 gradients, 146, 150-160, 164-167, 

 170, 172, 177 

 reversed, 209 

 in phloem, 134, 161, 180 



{See also Mechanism of trans- 

 port) 

 Protoplasm, as path of fluorescein 

 transport, 186, 204, 207, 209 

 of wall as path of hormone trans- 

 port, 216 

 withdrawal from cell, 141, 218 

 Protoplasmic streaming, affected by 

 respiration, 241 

 by surface tension, 183, 203, 209 

 by temperature, 181, 182, 224 

 in cambium, 42 



in companion cells, 139, 174, 181 

 and concentration gradients, 176 

 and diffusion hypothesis of trans- 

 port, 137, 174-178, 189, 195, 

 199, 203, 209, 227 

 advantages of, 177, 178, 228, 



247 

 weaknesses of, 178-188, 195, 242 

 and failure to transport lithium 



or caffein, 185 

 nature of, 182, 183, 195 

 in parenchyma cells, 179-182 

 through plasmodesma, 139, 141, 



142, 183, 184 

 rates of, 179, 181-183 

 in sieve tubes, 174, 175, 185 

 and surface tension, 183, 203, 209 

 and transport, 112, 137, 139, 143, 

 174-178, 203, 209, 218, 227, 

 241, 242, 245-247 

 of fluorescein, 186, 204, 207, 209 

 of growth substance, 215 



R 



Regeneration, 3, 100, 219, 222, 223, 

 236-239 

 as affected by anesthetics, 222 

 by carbohydrates or nitrogen, 



238, 239 

 by temperature, 224 



