Xiaofeng Yue1, Pengbao Shi2, Yali Tang1, Huaixin Zhang1, Xin Ma1, Yanlun Ju1, Zhenwen Zhang1,3. 1. College of Enology, Northwest A&F University, Yangling, China. 2. College of Food Science and Technology, Hebei Normal University of Science and Technology, Qinhuangdao, China. 3. Shaanxi Engineering Research Center for Viti-Viniculture, Yangling, P.R. China.
Abstract
BACKGROUND: The importance of monoterpenes in grape and wine aroma has compelled researchers to focus on developing methods to increase their abundance. Recent research has revealed that exogenous elicitors can increase the contents of these compounds. This study determined the effects of methyl jasmonate (MeJA) preharvest treatments on the monoterpene profiles of Muscat Hamburg grapes and wine. RESULTS: A total of 27 monoterpenes were identified for Muscat Hamburg grapes and wine. The contents of most of the monoterpenes (free and glycosylated forms) in the grapes and wine increased in response to MeJA. An analysis of the expression of the genes in the terpenoid biosynthesis pathway indicated that the related biosynthetic pathways were activated by MeJA. The transcript levels of some genes were consistent with monoterpene production, including VviCSLinNer, VviGwbOciF, VviPNRLin, VviGT14 and VviUGT85A1L1. The developmental expression patterns of the VviPP2B1 and VviMYB24 transcription factor genes were positively correlated with monoterpene accumulation in ripening grapes. CONCLUSIONS: Our results suggest that MeJA may be useful for improving the aroma quality of grapes and wines.
BACKGROUND: The importance of monoterpenes in grape and wine aroma has compelled researchers to focus on developing methods to increase their abundance. Recent research has revealed that exogenous elicitors can increase the contents of these compounds. This study determined the effects of methyl jasmonate (MeJA) preharvest treatments on the monoterpene profiles of Muscat Hamburg grapes and wine. RESULTS: A total of 27 monoterpenes were identified for Muscat Hamburg grapes and wine. The contents of most of the monoterpenes (free and glycosylated forms) in the grapes and wine increased in response to MeJA. An analysis of the expression of the genes in the terpenoid biosynthesis pathway indicated that the related biosynthetic pathways were activated by MeJA. The transcript levels of some genes were consistent with monoterpene production, including VviCSLinNer, VviGwbOciF, VviPNRLin, VviGT14 and VviUGT85A1L1. The developmental expression patterns of the VviPP2B1 and VviMYB24 transcription factor genes were positively correlated with monoterpene accumulation in ripening grapes. CONCLUSIONS: Our results suggest that MeJA may be useful for improving the aroma quality of grapes and wines.
Authors: María José Giménez-Bañón; Juan Daniel Moreno-Olivares; Diego Fernando Paladines-Quezada; Juan Antonio Bleda-Sánchez; José Ignacio Fernández-Fernández; Belén Parra-Torrejón; José Manuel Delgado-López; Rocío Gil-Muñoz Journal: Molecules Date: 2022-04-30 Impact factor: 4.927