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Comparison of the effects of auxin and fusicoccin on phosphate absorption by aged potato tuber discs
Author(s) -
Poder Danielle,
Hounnant Annick,
Penot Michel
Publication year - 1983
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.1399-3054.1983.tb05729.x
Subject(s) - fusicoccin , phosphate , auxin , absorption (acoustics) , chemistry , horticulture , botany , biology , biophysics , biochemistry , enzyme , atpase , physics , acoustics , gene
Auxin (IAA, 5 × 10 −5 M ) partially prevents the increase in the rate of phosphate uptake during ageing of potato tuber discs ( Solatium tuberosum L. cv. Bintje), whereas fusicoccin (FC, 10 −5 M) stimulates it. After the development of enhanced phosphate transport capacity, the response to fusicoccin is greater than with fresh discs. Complementary experiments on K + ( 86 Rb) absorption show that FC also slightly enhances the rate of K + uptake, while IAA has no much effect. It is suggested that IAA acts specifically on the development of a mechanism which occurs during the ageing period, while FC action may be more directly linked to the system of phosphate transport itself.