The interference of the ethylene perception machinery leads to a re-programming of the fruit quality-related transcriptome and induces a cross-talk circuit with auxin in apple
Ethylene is a gaseous plant hormone playing a myriad of roles during several processes taking place during the entire life-cycle of a plant. Amongst all, the hormone ethylene is considered to be the master regulator of climacteric fruit ripening, triggering and coordinating important physiological pathways leading, in the end, to the development of properties and features essential for the definition of fruit quality. In modern horticulture, however, excessive ripening can lead to serious general fruit decay and loss. To preserve the quality features acquired at the end of ripening, simultaneously preventing quality drop-off, the postharvest management can to date benefit of several strategies, among which the most efficient is the control of ethylene through exogenous application of a competitor known as 1-methylcyclopropene (1-MCP). The transcriptional re-programming coded by this molecule was investigated through the fruit development and ripening with two microarray platforms, a candidate gene based and a whole genome array, respectively. In parallel to the expected repressing effect, 1-MCP can also stimulate an equal dose of genes, mainly involved in the photosynthetic process, transcriptional regulation and hormones. In the end, the effect of ethylene has been also investigated into a more general fruit quality context. Although the inhibition of this hormone has an unquestionable effect on postharvest and fruit loss control, it may also harm fruit quality, diminishing the aromatic bouquet produced by the fruit.
Tadiello, A., Busatto, N., Farneti, B., Delledonne, M., Velasco, R., Trainotti, L. and Costa, F. (2018). The interference of the ethylene perception machinery leads to a re-programming of the fruit quality-related transcriptome and induces a cross-talk circuit with auxin in apple. Acta Hortic. 1206, 69-74
apple, fruit ripening, quality, ethylene, auxin, hormonal cross-talk