Effects of novel oxime ether derivatives of aminooxyacetic acid on ethylene formation in leaves of oilseed rape and barley and on carnation flower senescence
1993
Kirchner, J. | Schmidt, O. | Jung, J. | Rademacher, W.
New derivatives of aminooxyacetic acid were tested for their ability to inhibit ethylene formation in higher plants. Treatments with ([(isopropylidene)-amino]oxy)-acetic acid-2-(methoxy)-2-oxoethyl ester, ([(isopropylidene)-amino]oxy)-acetic acid-2-(hexyloxy)-2-oxoethyl ester or ([(cyclohexylidene)-amino]oxy)-acetic acid-2-(isopropyloxy)-2-oxoethyl ester reduced ethylene evolution by leaf discs of oilseed rape and drought-stressed barley leaves. The new compounds delayed senescence of cut carnation flowers. The endogenous levels of 1-aminocyclopropane-1-carboxylic acid (ACC) and its N-malonyl conjugate were also reduced in the leaf discs of oilseed rape. This suggests that a step in the biosynthesis of ethylene, prior to the formation of ACC, is inhibited by these new compounds. A lag phase in response suggests that these compounds have to be activated most likely by the production of metabolites with a free aminooxy group.
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