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Molecules 2014, 19(9), 13461-13472;

Bagging Treatment Influences Production of C6 Aldehydes and Biosynthesis-Related Gene Expression in Peach Fruit Skin

Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, China
Physiological Laboratory for South China Fruits, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
China Rural Technology Development Center, Beijing 100045, China
Author to whom correspondence should be addressed.
Received: 27 June 2014 / Revised: 20 August 2014 / Accepted: 25 August 2014 / Published: 29 August 2014
(This article belongs to the Special Issue Aromas and Volatiles of Fruits)
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Bagging is a useful method to improve fruit quality by altering its exposure to light, whereas its effect on fruit volatiles production is inconsistent, and the genes responsible for the observed changes remain unknown. In the present study, single-layer yellow paper bags were used to study the effects of bagging treatment on the formation of C6 aldehydes in peach fruit (Prunus persica L. Batsch, cv. Yulu) over two succeeding seasons. Higher concentrations of n-hexanal and (E)-2-hexenal, which are characteristic aroma volatiles of peach fruit, were induced by bagging treatment. After bagging treatment, peach fruit had significantly higher LOX and HPL enzyme activities, accompanying increased contents of C6 aldehydes. The gene expression data obtained through real-time PCR showed that no consistent significant differences in transcript levels of LOX genes were observed over the two seasons, but significantly up-regulated expression was found for PpHPL1 after bagging treatment In addition, bagging-treated fruit produced more (E)-2-hexenal and had higher expression levels of PpHPL1 during postharvest ripening at room temperature. The regulatory role of the LOX-HPL pathway on the biosynthesis of n-hexanal and (E)-2-hexenal in response to bagging treatment during peach fruit development is discussed in the text. View Full-Text
Keywords: bagging; C6 aldehydes; HPL; LOX; peach fruit bagging; C6 aldehydes; HPL; LOX; peach fruit

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Shen, J.-Y.; Wu, L.; Liu, H.-R.; Zhang, B.; Yin, X.-R.; Ge, Y.-Q.; Chen, K.-S. Bagging Treatment Influences Production of C6 Aldehydes and Biosynthesis-Related Gene Expression in Peach Fruit Skin. Molecules 2014, 19, 13461-13472.

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