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Effects of canavanine on IAA‐ and fusicoccin‐stimulated cell enlargement, proton extrusion and potassium uptake in maize coleoptiles
Author(s) -
COCUCCI M. C.,
ROSA S. DALLA
Publication year - 1980
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.1399-3054.1980.tb03248.x
Subject(s) - fusicoccin , coleoptile , cycloheximide , elongation , canavanine , leucine , protein biosynthesis , biochemistry , potassium , biophysics , chemistry , biology , arginine , amino acid , materials science , ultimate tensile strength , enzyme , organic chemistry , atpase , metallurgy
In maize coleoptiles ( Zea mays F 1 XL 640A, cv. Dekalb) canavanine and cycloheximide strongly and simultaneously inhibit cell elongation, H + extrusion and K + uptake, induced by IAA. They inhibit also, although to a much lesser degree, the same phenomena induced by fusicoccin. Cycloheximide severely depresses the incorporation of leucine into proteins, while canavanine leaves leucine incorporation almost unchanged. The data confirm that elongation, H + extrusion and K + uptake can be regarded as correlated processes; they also support the view that normal protein synthesis is essential for IAA‐induced growth, while this requirement is only partial in growth stimulated by fusicoccin.