文献类型： 外文期刊

作者： Yuan, Lei ¹ ; Yun, Yurou ¹ ; Tian, Jun ¹ ; Gao, ZhengQing ² ; Xu, Zhenzhen ³ ; Liao, Xiaojun ⁴ ; Yi, Junjie ¹ ; Cai, Shengbao ¹ ; Zhou, Linyan ¹ ;

作者机构： 1.Kunming Univ Sci & Technol, Fac Food Sci & Engn, Kunming 650500, Yunnan, Peoples R China

2.Yunnan Acad Agr Sci, Yunnan Inst Hort Crops, Kunming 650205, Yunnan, Peoples R China

3.Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Key Lab Agrofood Safety & Qual, Minist Agr & Rural Affairs, Beijing 100081, Peoples R China

4.China Agr Univ, Coll Food Sci & Nutr Engn, Beijing 100083, Peoples R China

关键词： Pomegranate arils; Flavor; Transcriptome; Metabolome; Volatile compounds; Weighted gene co-expression network analysis

期刊名称：FOOD RESEARCH INTERNATIONAL （ 影响因子：7.425； 五年影响因子：7.716 ）

ISSN： 0963-9969

年卷期： 2022 年 156 卷

页码：

收录情况： SCI

摘要： Flavor is an important factor affecting the sensory of pomegranate and its products, which easily lose its freshness during processing and storage, but the biosynthesis of flavor-associated compounds is poorly understood until now. In this study, combining metabolome and transcriptome, flavor-associated attributes and volatile compounds of Tunisian pomegranate arils from 7 Chinese regions were studied. Depending on the different planting areas, there were significant differences in the content of sugars, organic acids and vitamin C. A total of 40 volatile compounds were characterized from all samples, of which 13 volatile compounds were common to all samples. There were 4 compounds showed higher contents in all samples, including 1-hexanol, (Z)-3-hexen-1-ol, alpha-terpineol, and 2,4-di-tert-butyl phenol. According to the Kyoto Encyclopedia of Genes and Genomes pathway analysis, 5 differential accumulated metabolites, including palmitic acid, octanoic acid, lauric acid, decanoic acid, and myristic acid, were significantly enriched in the fatty acid biosynthesis for all samples. Weighted gene co-expression network analysis revealed that 42 candidate flavor-associated differentially expressed genes and 9 transcription factors mainly located in 3 key modules. Hexanoic acid was an important metabolite, which was significantly correlated with 38 differentially expressed genes. Generally, complex regulatory networks were constructed in the study to identify structural genes and transcription factors which regulate the metabolism of volatile compounds in pomegranate. Our results provided new insights for understanding the difference in flavor biosynthesis and regulatory network of pomegranate arils.