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Non‐steady state xylem transport of fifteen elements into the tomato leaf as measured by gamma‐ray spectroscopy: A model
Author(s) -
Wolterbeek H. Th.,
Luipen J.,
Bruin M.
Publication year - 1984
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1984.tb05176.x
Subject(s) - xylem , lycopersicon , spectroscopy , chemistry , conductance , ion , analytical chemistry (journal) , steady state (chemistry) , ion transporter , botany , physics , chromatography , biology , organic chemistry , quantum mechanics , condensed matter physics
A model describing the transport of elements through the xylem vessels into the leaf of a red cherry tomato ( Lycopersicon esculentum Mill cv. Tiny Tim) in a non‐steady state situation is presented. The model describes the upward movement of ions as a mass‐flow of the xylem fluid with dissolved elements, with lateral ion escape represented by a first‐order process. The model is fitted to data obtained in an experiment in which 15 elements were applied in a solution to a cut stem part with attached leaf and were measured simultaneously by gamma‐ray spectroscopy. The model is in good agreement with the transport into the leaf of K + Na + , Rb + , Cs + , Yb 3+ , Sm 3+ Zn 2+ , Co 2+ , Cu 2+ , Sb(SO 4 ) 2 AsO 3+ 4 , WO 2+ 4 ; and Mo 7 O 6+ 24 . Only indirect data could be obtained for Cd 2+ and La 3+ because of their apparently high affinity for charged sites in the cell walls and high escape constant, respectively. The escape constants were relatively low for all anions, probably due to the presence of a large number of negative charges in the cell walls.