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UPTAKE OF IONS BY ROOTED WILLOW CUTTINGS
Author(s) -
BOVIS C. P.,
BRIGGS G. E.
Publication year - 1969
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1969.tb06508.x
Subject(s) - willow , cutting , chemistry , bark (sound) , botany , horticulture , ion , biology , ecology , organic chemistry
S ummary The uptake of radioactive ions from solutions into the root, wood and bark of the stem, and leaves of rooted willow cuttings has been investigated. The salts used were Na 82 Br, K 131 I, 42 KCl and 86 RbCl. In none of the experiments did the amount of isotope even in the lowest part of the stem reach the value to be expected if its concentration in the water‐free space there was equal to that outside the roots. After 9 days when 520 ml had been transpired hy a plant weighing 34 g the estimated concentration of 86 Rb in the water‐free space of the wood was less than one‐seventh of that outside the roots. Transport to the bark appears to be via the wood. For the stems plus leaves the ratio of uptake of an ion to that of water was less than the concentration outside except in one experiment, which was exceptional in other respects. The gradient of concentration in the wood and the contribution of diffusion to uptake are discussed.