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Clacium ion involvement in growth inhibition of mechanically stressed soybean ( Glycine max ) seedlings
Author(s) -
Jones Russell S.,
Mitchell Cary A.
Publication year - 1989
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.1399-3054.1989.tb05485.x
Subject(s) - hypocotyl , elongation , glycine , egta , ionophore , calmodulin , chemistry , growth inhibition , calcium , biophysics , biochemistry , biology , horticulture , cell growth , amino acid , enzyme , membrane , materials science , organic chemistry , metallurgy , ultimate tensile strength
A 40–50% reduction in soybean [ Glycine max (L.) Merr. cv. Century 84] hypocotyl elongation occurred 24 h after application of mechanical stress. Exogenous at 10 m M inhibited growth by 28% if applied with the Ca 2+ ionophore A23187 to the zone of maximum hypocotyl elongation. La 3+ was even more inhibitory than Ca 2+ , especially above 5 m M . Treatment with ethyleneglycol‐bis‐(β3‐aminoethylether)‐N, N, N′, N′‐tetraacetic acid (EGTA) alone had no effect on growth of non‐stressed seedlings at the concentrations used but negated stress‐induced growth reduction by 36% at 4 m M when compared to non‐treated, stressed controls. Treatment with EDTA was ineffective in negating stress‐induced growth inhibition. Calmodulin antagonists calmidazolium, chlorpromazine, and 48/80 also negated stress‐induced growth reduction by 23, 50, and 35%, respectively.