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Phytohormonal changes in intact shoots of wheat and oilseed rape treated with the acylcyclohexanedione growth retardant prohexadione calcium
Author(s) -
Grossmann Klaus,
KönigKranz Susanne,
Kwiatkowski Jacek
Publication year - 1994
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.1399-3054.1994.tb02203.x
Subject(s) - shoot , abscisic acid , gibberellin , biology , seedling , calcium , horticulture , brassica , botany , agronomy , chemistry , biochemistry , organic chemistry , gene
The effects of the acylcyclohexanedione‐type growth retardant prohexadione calcium on seedling growth and endogenous levels of immunoreactive phytohormone‐like substances in shoots of wheat ( Triticum aestivum L. cv. Kanzler) and oilseed rape ( Brassica napus L. ssp. napus cv. Lirajet) were studied. After treatment of seedlings with increasing retardant concentrations in hydroponics, plant height and fresh weight of shoots were reduced by up to 40%. Concomitantly, the amount of immunoreactive gibberellins decreased, on a fresh weight basis, when compared with levels in the shoots of control plants. In contrast, the levels of abscisic acid and dihydrozeatin riboside and isopentenyladenosine‐type cytokinins were considerably elevated by the growth retardant. The content of 3‐indoleacetic acid decreased slightly. These results suggest that, in addition to its effect on gibberellin content, prohexadione calcium also influences the levels of endogenous abscisic acid and cytokinins.