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Triadimefon stimulates rooting in bean hypocotyl
Author(s) -
Fletcher R. A.,
AsareBoamah N. K.,
Krieg L. C.,
Hofstra G.,
Dumbroff E. B.
Publication year - 1988
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.1399-3054.1988.tb00617.x
Subject(s) - triadimefon , putrescine , hypocotyl , spermine , phaseolus , gibberellic acid , spermidine , biology , brassinolide , paclobutrazol , botany , biosynthesis , fungicide , ethephon , polyamine , ethylene , biochemistry , germination , plant growth , enzyme , catalysis
Triadimefon, a broad spectrum fungicide and an inhibitor of gibberellic biosynthesis, whitened, thickened, and shortened the roots of bean ( Phaseolus vulgaris L. cv. Spring Green) seedlings and stimulated the development of root primordia along the hypocotyl. In a comparative study, triadimefon, IAA, spermidine, putrescine and spermine all stimulated adventitious root growth, but triadimefon was more effective than the other 4 compounds. Equimolar concentrations of gibberellic acid (GA 3 ) completely eliminated the stimulatory effect of triadimefon. Stimulation of root development by triadimefon was accompanied by inhibition of ethylene biosynthesis followed by removal of basal dominance and an increase in polyamine levels, both of which occurred after rooting had begun. Although triadimefon was effective in stimulating rooting, its mechanism of action is apparently not mediated via the control of ethylene and polyamine biosynthesis.