INDEX 



269 



Methods, of movement through 

 phloem, and interpretation of 

 growth responses, 227 

 of obtaining sap from xylem, 99, 



102, 103, 119-122 

 of protecting ring wounds, 25, 37, 



126, 128 

 of studying translocation, 4, 5, 8, 

 22, 44, 109-131, 208, 213, 214 

 of supplying water to stems with 

 xylem cut, 36, 37 

 {See also Ringing; Xylem cut- 

 ting experiments) 

 Miinch pressure flow hypothesis, 

 136-149, 170, 187, 189, 201, 

 208, 214, 218, 219, 227 

 advantages of, 147-149, 228, 247, 



248 

 weaknesses of, 149-164, 172, 178, 

 219, 242, 245, 248 



N 



Nitrogen, removal, from fruits, 242 

 from leaves, 44, 55, 211, 220, 

 221, 242 

 (See also Loss) 

 transport, effect of ringing on, 

 47-64 

 restricted to xylem, 140, 149, 



199, 201 

 in xylem, 51, 52, 56, 58-64, 

 77-86, 149, 150, 200 



O 



Osmotic competition for water, 

 27-30, 40, 54, 111, 238, 240 



Osmotic concentration of phloem 

 exudate, 180 



Osmotic gradients, 150-159, 189, 219 



Osmotic mechanism of solute trans- 

 port (see Crafts and Miinch 

 pressure flow hypotheses) 



Nitrogen, absorption by dead roots, 

 78, 84 

 accumulation above rings, 52, 54, 



55, 57-61, 63, 86 

 content, influenced by carbo- 

 hydrate, 50, 52, 62, 63, 81. 



82, 123 

 (See also Carbohydrate) 

 cross transfer of, 58 

 direction of movement. 199-202 

 diurnal changes in, 55, 61, 64-70, 



82 

 effect on regeneration, 238 

 form of transport, 60, 81, 19^201 

 gradients, 70, 192-194,. 199-202 

 loss from tissue (see Loss) 

 movement, into developing fruits, 



242, 244 

 into and out of tissues, 52, 54, 



55, 61, 221 

 organic, in transpiration stream, 



60, 150, 200 

 radial distribution of, 193, 194 

 redistribution between tissues, 62, 



63 



Parenchyma, transport in, 136, 187, 



204, 217 

 Permeability, affecting entrance into 

 the xylem, 80, 99, 106, 113, 119 

 of cell membrane, 139-141, 143, 



145, 147, 173, 195 

 of sieve-tube protoplasm, 166, 168, 

 170, 171 

 evidence for, 168 

 Phloem, adequacy or inadequacy of, 

 10, 43, 56, 92-96, 104, 105, 124, 

 130, 178-181 

 bidirectional movement in, 10, 56, 

 57, 124, 149, 176, 177, 186, 

 210, 219, 220 

 content, 8, 133-136, 164, 180, 181 

 direction of movement in, 9, 10, 

 35, 56, 57, 88, 138, 139, 143, 

 149, 176, 186, 187, 200, 201, 

 205-214, 218-220, 237, 245 

 directive transport through, 158, 



159, 177, 195, 219, 248 

 exudate. 135, 164, 181 

 coagulation of, 161, 162 



