EFFECT OF ETHYLENE ON CHANGES IN THE CONTENTS OF TOTAL AND INDIVIDUAL FREE AMINO ACIDS IN COROLLAS FROM CUT 'SONIA' ROSES

N. Gorin, A. J. Lukaszewska, Gerrit R. Dreise
There was no accumulation of total free amino acids (calculated as the sum of the individual amino acids) in corollas from cut 'Sonia' roses either treated with ethylene (12 μl/1 for 24 h at 20 °C in darkness) or untreated (control) flowers. In the two groups, total amino acids decreased from the reference level (100 %, Day 0) to about 60 % (Day 3), thereafter remaining almost constant. The contents of total amino acids on different days after harvest were similar between the two classes of flowers too. Thus, ethylene treatment did not affect the contents of total amino acids in the corollas.

We did not find a correlation between total amino acids and protease activity in the respective corollas from either class of flowers.

Of the thirteen individual free amino acids that we determined, only three were affected statistically by the ethylene treatment: glutamic acid, histidine and leucine. However only the content of leucine differed clearly between corollas from both classes of flowers on Days 6, 9 and 12. From Day 9 to 12, it was undetectable in corollas from control flowers. Glutamic acid and histidine contents differed only on Day 3 after harvest. So ethylene treatment did not affect the transformation of most of the individual free amino acids from corollas of cut roses.

Gorin, N., Lukaszewska, A. J. and Dreise, Gerrit R. (1989). EFFECT OF ETHYLENE ON CHANGES IN THE CONTENTS OF TOTAL AND INDIVIDUAL FREE AMINO ACIDS IN COROLLAS FROM CUT 'SONIA' ROSES. Acta Hortic. 261, 191-196
DOI: 10.17660/ActaHortic.1989.261.23
https://doi.org/10.17660/ActaHortic.1989.261.23

Acta Horticulturae