Article | . 2019 Vol. 37, Issue. 1
Fruit Ripening and Related Gene Expression in ‘Goldone’ and ‘Jecy Gold’ Kiwifruit by Exogenous Ethylene Application

Department of Horticulture, Gyeongsang National University1
Namhae Sub-Station, National Institute of Horticultural and Herbal Science, Rural Development Administration, Namhae2
Department of Biology Education, Gyeongsang National University3
Institute of Agriculture and Life Science, Gyeongsang National University4

2019.. 54:64


We studied the effect of exogenous ethylene application on fruit ripening and its related gene expression in kiwifruit (Actinidia chinensis) ‘Goldone’ and ‘Jecy Gold’ grown in Korea. The fruit ripening characteristics that were affected by exogenous ethylene were evaluated to implement the best post-harvest management practices for these two cultivars. Exogenous ethylene was applied in three different concentrations, and gene expression related to cell wall degradation, ethylene biosynthesis, and fruit quality changes were examined. The kiwifruits treated with exogenous ethylene ripened very fast compared to non-treated kiwifruits. A. chinensis ‘Jecy Gold’ was relatively insensitive to exogenous ethylene treatment when compared to A. chinensis ‘Goldone’. Exogenous ethylene accelerated ethylene biosynthesis and signaling pathways through changes in the expression of ACO and ERF5 genes. Furthermore, PGC and EXP2 gene expression was affected by exogenous ethylene application, suggesting changes in cell wall degradation in response to ethylene signaling. Relatively high gene expression was identified in kiwifruits treated with exogenous ethylene compared to untreated kiwifruits. The distinct expression differences of the four genes, ACO, ERF5, PGC, and EXP2 were recorded in A. chinensis ‘Goldone’ by the concentration of exogenous ethylene and days after treatment.

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