‘골드원’, ‘제시골드’ 키위프루트 과실의 에틸렌 처리에 따른 과실 후숙 및 관련 유전자의 발현

Abstract

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.