In this study,an excellent hybrid tea cultivar Camellia sinensis cv.‘Jinmudan’(‘JMD’)and its parental generations cultivars C.‘Huangdan’(‘HD’)and‘Tieguanyin’(‘TGY’)were processed into JMD,HD and TGY black ...In this study,an excellent hybrid tea cultivar Camellia sinensis cv.‘Jinmudan’(‘JMD’)and its parental generations cultivars C.‘Huangdan’(‘HD’)and‘Tieguanyin’(‘TGY’)were processed into JMD,HD and TGY black tea through same processing respectively.The results of sensory evaluation showed that JMD has unique aroma properties,and higher quality of taste.Then,the key metabolites variations of‘JMD’and its parental generations during the whole black tea processing were performed by metabolomic and transcriptomic analysis.The results showed that the metabolic profile of‘JMD’was closer to its male parent‘HD’and the key metabolites were mainly derivatives of catechins and glycosidic substances during JMD processing.The content of methyl jasmonate in JMD was higher than HD and TGY,which might be the key factor in determining the aroma quality of JMD.The expression of genes inα-linolenic acid metabolic pathway during withering were higher in JMD than in HD through transcriptomic.Gene expressions of lipoxygenase(LOX2S)and jasmonic acid carboxyl methyltransferase(JMT)in the metabolic pathway of methyl jasmonate biosynthesis were found to be greater in JMD than that in HD.In summary,the cultivar specificity plays more important role in the quality of the final tea.展开更多
基金supported by the National Key Research and Devel-opment Program of China(2021YFD1601103)the science and tech-nology project of Fujian province(2022S0040)earmarked fund CARS(CARS-19).
文摘In this study,an excellent hybrid tea cultivar Camellia sinensis cv.‘Jinmudan’(‘JMD’)and its parental generations cultivars C.‘Huangdan’(‘HD’)and‘Tieguanyin’(‘TGY’)were processed into JMD,HD and TGY black tea through same processing respectively.The results of sensory evaluation showed that JMD has unique aroma properties,and higher quality of taste.Then,the key metabolites variations of‘JMD’and its parental generations during the whole black tea processing were performed by metabolomic and transcriptomic analysis.The results showed that the metabolic profile of‘JMD’was closer to its male parent‘HD’and the key metabolites were mainly derivatives of catechins and glycosidic substances during JMD processing.The content of methyl jasmonate in JMD was higher than HD and TGY,which might be the key factor in determining the aroma quality of JMD.The expression of genes inα-linolenic acid metabolic pathway during withering were higher in JMD than in HD through transcriptomic.Gene expressions of lipoxygenase(LOX2S)and jasmonic acid carboxyl methyltransferase(JMT)in the metabolic pathway of methyl jasmonate biosynthesis were found to be greater in JMD than that in HD.In summary,the cultivar specificity plays more important role in the quality of the final tea.
