A Mechanism for the Leaching of Calcium from Foliage | Zendy

R. A. Mecklenburg | Zendy; H. B. Tukey | Zendy; J. V. Morgan | Zendy

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A Mechanism for the Leaching of Calcium from Foliage

Author(s) -

R. A. Mecklenburg,

H. B. Tukey,

J. V. Morgan

Publication year - 1966

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.41.4.610

Subject(s) - leaching (pedology) , phaseolus , calcium , chemistry , ion exchange , chromosomal translocation , diffusion , dissolution , ion , environmental chemistry , inorganic chemistry , botany , soil water , soil science , biology , biochemistry , environmental science , physics , organic chemistry , gene , thermodynamics

Young bean plants (Phaseolus vulgaris) containing root-absorbed (45)Ca and (86)Rb were leached to determine the pathway and mechanism of cation loss by leaching. Calcium is leached from the exchangeable calcium fraction within the plant by a process of ion exchange and diffusion involving exchange sites both within the leaf and on the leaf surface. Leaching of cations is primarily a passive process, although some metabolites may be deposited upon leaf surfaces by active processes. The exchange and diffusion explanation is compatible with current theories of ion uptake and translocation and explains the results of numerous experiments on leaching reported in the literature.

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