INDEX 



271 



Reversals of movements, in phloem, 

 149, 197, 199, 220, 245 

 in xylem, 5, 91-94, 97, 98, 101, 

 104, 105, 110 

 Ring wound dressings, 25, 37, 53, 



126-129 

 Ringing, and ash or mineral trans- 

 port, 47-64, 123 

 and carbohydrate transport, 6-8, 



12-46, 88, 118, 194 

 double, 14-17, 22, 24, 30, 31, 52 

 effect, on growth, 12-14, 24-29, 

 38-40, 130, 235, 236 

 on regeneration, 236-239 

 experiments, interpretation of, 130 

 and injury to the xylem, 27, 36, 

 43, 53, 94, 100, 104, 125-131 

 and nitrogen transport, 47-64, 



86, 123 

 partial, 13, 36, 128-130 

 spiral, 58 



S 



Sap, bleeding, 79-80n., 117-124, 148 

 guttation, 79-80n., 121, 122, 148 

 xjdem, composition of, 5, 6, 12, 60, 

 78-81, 99, 101-103, 116-124, 

 150 

 from different layers, 101 

 extraction method, 99, 102, 103, 

 119-122 

 {See also Exudation) 

 Secretion, of ions, 79-80n. 



of water, 143-145, 148, 156, 160 

 Sieve pores, calloused, 135, 166, 172, 

 180, 226 

 fluorescein movement through, 205 

 mass flow through, 135, 138, 139, 

 145, 147, 165, 166, 170, 172, 

 184 

 protoplasm within, 163, 164, 166 

 protoplasmic streaming through, 



184 

 rates of flow through, 164, 169, 



179, 184 

 size, 135, 147, 164, 166, 172, 180 

 Sieve tube, condition in, 104, 112, 

 134, 135 



Sieve tube, content, 134, 228 



abnormal distribution of, 138, 

 139, 175 

 {See also Phloem exudate) 

 fluorescein absorption by, 204, 205 

 hormone movement in, 214, 219 

 mass flow through, 135-139, 143- 



174 

 plugging, 161, 162, 178, 226 

 pressure in, 134, 161, 180 

 protoplasmic streaming in, 174, 



175, 185 

 significance of, 8, 178, 227, 228 

 size, 135, 164, 172, 180, 181 

 structure, 134, 178 

 unequal distribution of materials 

 within, 195, 196, 203, 209, 

 210, 213, 216, 218 

 Significance, of sieve tubes, 8, 178, 

 227, 228 

 of translocation, 1-3, 137, 235 

 Slime plug, 138, 139 

 Spiral ringing, 58 



Starch test, as a criterion for carbo- 

 hydrate content, 13-15, 19-21, 

 24, 31, 221, 225 

 {See also Carbohydrate) 

 Starvation {see Carbohydrate, effect 



on ash or nitrogen) 

 Storage tissues, 12-14, 198 



filling or emptying of, 21, 140, 

 152-156, 188 

 Sucrose, fluctuations in, 196 



gradient, 187, 189, 190, 195, 196 

 radial distribution of, 192-194 

 as transport sugar, 187, 188, 192, 

 194 

 Sugar, maple, 6 



{See also Carbohydrate; Hexose; 

 Sucrose) 

 Surface tension, hypothesis of trans- 

 port, 202-204, 208, 209, 222, 228 

 and protoplasmic streaming, 183, 

 209, 241 



Temperature, effect on exudation, 

 119-162 



