The simultaneous movement of two ions in the phloem of theSaxifragastolon

✍ Scribed by F. A. Qureshi; D. C. Spanner

• Book ID: 104750809
• Publisher: Springer-Verlag
• Year: 1973
• Tongue: English
• Weight: 387 KB
• Volume: 112
• Category: Article
• ISSN: 0032-0935
• DOI: 10.1007/bf00388582

✦ Synopsis

Paris of tracers were applied simultaneously to the long thin stolons of Saxifraga sarmentosa. After several hours of translocation the very precise pattern of exponential fall-off was examined and interpreted in the light of a model of mass flow with leakage. (42)K appears to leak faster than (22)Na; (86)Rb is very close to (42)K. The anion (82)Br shows a lower fall-off than (137)Cs; this is tentatively regarded as due to a much-reduced leakage, though it might imply a higher velocity. The implications of these findings for sieve-tube mechanism are uncertain.