272 



TRANSLOCATION IN PLANTS 



Temperature, effect on fluorescein 

 movement, 206 

 on hormone movement, 215-217 

 on protoplasmic streaming, 181, 



182, 224 

 on regeneration, 223, 224 

 on starch-sugar equihbrium, 19, 



20, 119 

 on translocation, 162, 223, 227 

 Tissues, concerned in downward 

 transport, 6-11, 88-106, 109 

 in upward transport, 3-6, 9, 10, 

 12-44, 47-86, 103 

 in herbaceous as contrasted 



with woody plants, 81 

 of organic as contrasted with 

 inorganic solutes, 10, 57, 113 

 cross section, areas of, 94-96, 

 166, 171, 179 

 {See also Cambium; Paren- 

 chyma; Phloem; Pith; 

 Xylem) 

 Transpiration, equalized from check 

 and ringed stems, 30, 50, 56 

 indirect effect on salt content, 72 

 minimum necessary for transport, 



54, 75 

 from ringed stems, 27-30, 50, 53, 



54, 170 

 and salt absorption, 70-78 

 and transport through the xylem, 

 8, 30-33, 50, 52, 54-57, 64, 

 70-86, 98, 123, 149 

 (See also Xylem) 

 Trapping, above rings, 52, 54, 55, 

 57, 60, 61, 63, 86 



V 



Van den Honert, surface film 

 hypothesis, 202-204, 208, 209, 

 222, 228 

 Virus, amounts transported, 214 

 electrical charge on, 213, 218 

 movement, direction of, 186, 210- 

 214 

 independent of carbohydrate, 

 211, 212 



Virus, movement, indicator of normal 



transport, 213, 214 

 path of, same as carbohydrate, 



211 

 rate of, 186, 211-213, 218 

 relation to plasmodesma, 184 

 tissues concerned, 187, 210 



W 



Walls, as channel of transport, 116, 

 135, 164-174, 207, 216, 217, 219 

 phloem, possibly elastic, 133-135, 

 172, 180 

 water content of, 164, 180 

 xylem, rigidity of, 133 

 Water, absorption and salt absorp- 

 tion, 71, 73, 75 

 competition for by tissues, 27-30, 



40, 54, 111, 238, 240 

 content, changes affecting inter- 

 pretation of data, 65-70, 221 

 effect, on starch-sugar equi- 

 librium, 20 

 on translocation, 156-158, 206 

 fluctuations in xylem, 110, 148 

 cross transfer, 58, 93 

 deficiency above ring, 27-30, 



125-131 

 movement, independent of nitro- 

 gen, 58 

 of sugar, 30, 33 

 through phloem, 90 

 and solute transport, 5 

 through stem equalized, 50 

 removal from receiving cells, 145, 



156, 160, 170 

 secretion, from cambium, 148, 169 

 from osmotic chamber, 143-145 

 supply to shoots with xylem cut, 

 36, 37 



X 



Xylem, backward movement 

 through, 5, 7, 91-94, 97, 98, 105 

 conditions favoring upward trans- 

 port in, 78, 80, 84, 150, 200 

 cutting experiments, 36-44, 75, 

 89, 124, 125 

 partial cutting, 13, 128, 129 



