IMPROVEMENT OF POSTHARVEST PERFORMANCE OF ORNAMENTAL PLANTS BY CHEMICAL COMPOUNDS AND MOLECULAR BIOLOGY TECHNIQUES

M. Serek, H. Mibus, E.C. Sisler
Ethylene has been proved to create adverse effects in ethylene sensitive floriculture crops. A powerful strategy in preventing ethylene responses in ornamentals and subsequently increasing their display life and longevity of flowers is blocking ethylene binding sites. Use of chemical compounds is one of the most efficient and low-cost methods to execute such interference.
The most powerful ethylene antagonist, which has been used in ornamental industry for more than 40 years, is silver thiosulfate (STS). However, because of the toxic nature of the silver ion alternative chemicals have been tested in the last two decades for their ability in blocking ethylene synthesis and perception. Several gaseous compounds have been evaluated, which lead to the discovery of 1-substituted cyclopropenes (1-CPs), which effectively prevent ethylene action at the receptor level. The most simple of 1-CPsis is 1-Methylcyclopropene (1-MCP), which has been commercialized and presently is successfully used worldwide for ethylene sensitive horticulture crops, including edible and ornamental crops.
The volatile character of the 1-CPs limited their use to enclosed systems. Non-volatile formulations for e.g., outdoor applications were therefore needed. Recently, several newly synthesized non-volatile cyclopropenes with a methyl group in the 1-position, on which a substituted amine was attached, have been tested. A non-volatile salt, N,N-dipropyl (1-cyclopropenyl-methyl) amine (DPCA), which can be applied to plant material as a gas, dip or spray has been reported as an effective ethylene blocker in edible and ornamental plant species. The tested plant material was effectively protected against undesirable effects of ethylene.
One of the effective ways to control ethylene synthesis and ethylene responses in plants is genetic modification. The introduction of the mutant ethylene receptor gene, etr1-1, from Arabidopsis has been proved as the most promising for such purpose, especially when its expression is controlled by a flower specific promoter. Several ornamental species, which were genetically modified with etr1-1 mutant gene showed a strong ethylene tolerance.
Serek, M., Mibus, H. and Sisler, E.C. (2014). IMPROVEMENT OF POSTHARVEST PERFORMANCE OF ORNAMENTAL PLANTS BY CHEMICAL COMPOUNDS AND MOLECULAR BIOLOGY TECHNIQUES. Acta Hortic. 1047, 191-198
DOI: 10.17660/ActaHortic.2014.1047.23
https://doi.org/10.17660/ActaHortic.2014.1047.23
1-methylcyclopropene (1-MCP), 1-substituted cyclopropenes (1-CPs), flower longevity, N,N-dipropyl(1-cyclopropenyl-methyl)amine (DPCA), postharvest quality, silver thiosulfate (STS)
English

Acta Horticulturae