外源乙烯对冷藏桃果实香气物质合成的调控

doi:10.11707/j.1001-7488.20140308

Abstract

Abstract:

In order to explore the regulation of exogenous ethylene on biosynthesis of aroma volatiles in peach during cold (0 ℃) storage, the release of aroma components as well as the changes of LOX, ADH and AAT activity closely related biosynthesis of aroma volatiles were investigated. The peaches stored at ambient temperature and 0 ℃ respectively served as the control 1 and control 2. The results showed that the syntheses of 19 components were inhibited by low temperature and their contents decreased. However the all components, except for menthol, were induced by exogenous ethylene and increased. The other 10 components were induced by low-temperature and increased in the cold storage. Four components of the 10 were induced by exogenous ethylene simultaneously, while the rest six were inhibited by exogenous ethylene. Low temperature repressed the synthesis of menthol, thus it was detected only under room temperature condition. Low-temperature storage resulted in obstacles of floral aroma esters metabolism, and lowered the fruit quality, while exogenous ethylene could promote the biosynthesis of the characteristic aroma linalool and γ-decalactone, inhibit hexanal, trans-2-hexenoic aldehyde and benzaldehyde release, and reduced the radio of the grassy flavor and floral flavor, so that the fruit quality was improved by exogenous ethylene. LOX activity was inhibited by exogenous ethylene, but the activity of ADH and AAT were elevated by exogenous ethylene, leading to reduction of the content of 6-C aldehydes accordingly.

Key words: peach fruit, low temperature storage, aroma volatiles, exogenous ethylene

CLC Number:

S718.43

Wang Guizhang, Li Yangxin, Wang Guixi, Liang Lisong, Ma Qinghua. Aroma Volatiles Biosynthesis and Relative Enzyme Activities Regulated by Exogenous Ethylene in Peach Fruits Stored at Low Temperature[J]. Scientia Silvae Sinicae, 2014, 50(3): 55-62.

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Aroma Volatiles Biosynthesis and Relative Enzyme Activities Regulated by Exogenous Ethylene in Peach Fruits Stored at Low Temperature

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