The effect of (2-chloroethyl) trimethylammonium chloride on the growth of barley
1972
Russell, S.L. | Kimmins, W.C.
Barley (Hordeum vulgare L. C.I.666) was shown to be susceptible to the growth retardant (2-chloroethyl)-trimethylammonium chloride (CCC). The estimation of cell number in the dwarfed third leaf blade indicated that a decrease in mitotic activity had occurred in treated plants. There was also a decrease in cell size in treated plants. The dwarfing action of CCC was reversed by exogenous gibberellic acid (GA3) but this was shown to be the result of increased cell elongation only. GA3 did not promote cell division in healthy or CCC-treated plants. Assay of endogenous gibberellins showed a significant reduction in the level of a substance corresponding to GA3 in CCC-treated plants. It is suggested that CCC-induced dwarfing of barley is largely the result of a reduction in meristematic activity. This may be related to an effect on gibberellin biosynthesis but is not reversed by the application of exogenous GA 3.
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