ISHS Acta Horticulturae 91: Symposium on Growth Regulators in Floriculture
STUDIES ON ROOTING COFACTORS IN LILAC /SYRINGA VULGARIS L./ CUTTINGS |
| Author: | K. Bojarczuk |
| Abstract:
Using biotests studies were conducted in order to explain differences in rootability between cuttings of lilacs. On the basis of the results obtained the following conclusions are drawn: a/ after flowering and during dormancy of lilacs the levels of rooting promoters decrease and the levels of inhibitors increase, b/ the intensity of rooting of cuttings from various varieties is to a large extent correlated with the activity of inhibitors and promoters of rooting present in them. Treating cuttings with alpha-naphtylacetic acid /NAA/ has caused a general lowering of the level of phenolics in the whole cuttings and in their various parts /leaves shoots, buds/. Cuttings of easily rooting varieties were characterized by higher content of ortho-dihydroxyphenols and lower content of monohydroxyphenols than was the case in cuttings of varieties difficult to root. | |
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