Transcriptome and Metabolome Analyses of Glucosinolate Biosynthesis-Related Genes in Different Organs of Broccoli (Brassica oleracea L. var. italica)
文献类型： 外文期刊
作者： Tian, Xiuling 1 ; He, Hongju 1 ; Yu, Xiaolu 1 ; Wang, Yaqin 1 ; Hu, Liping 1 ; Cheng, Bing 1 ; Ding, Yunhua 2 ; Liu, Guangmin 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Agrifood Proc & Nutr, Beijing 100097, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Vegetable Res Ctr, Beijing 100097, Peoples R China
关键词： broccoli; glucosinolates; flavonoid; transcriptome; metabolome
期刊名称：APPLIED SCIENCES-BASEL （ 影响因子：2.7； 五年影响因子：2.9 ）
ISSN：
年卷期： 2023 年 13 卷 10 期
页码：
收录情况： SCI
摘要： Broccoli (Brassica oleracea L. var. italica) is a globally popular vegetable because of its nutrient richness, especially its glucosinolates (GSLs). The content of GSLs in different organs of broccoli varies greatly. However, few studies have focused on the differences in the GSLs biosynthesis-related genes in different organs. In this study, we selected extreme individuals from an F-2 population of broccoli and mixed them to form low and high glucoraphanin content pools of leaf, stalk and floret, respectively. Transcriptome and metabolome analyses showed that 539, 755 and 617 genes are significantly differentially expressed, and 44, 66 and 118 metabolites are significantly differentially accumulated in leaf, stalk and floret comparison groups, respectively. The combined analysis revealed that some genes such as Bo5g113720, Bo2g161100 and Bo7g09800, Bo4g018590, Bo5g021810, and Bo2g011730 showed different expression trends between low and high glucoraphanin content pools, which increased the accumulation of glucoraphanin. These genes have different expression levels in the three plant parts. Strikingly, the accumulation of glucoraphanin upregulated the expression of plant hormone signal transduction-related genes TIFY, JAR1, IAA, GH3 and SAU, and also increased the levels of tentatively identified flavonoid metabolites. Our study deepens the understanding of glucosinolate biosynthesis in different organs at the molecular level, and also provides evidence for the crosstalk between glucosinolates and flavonoids biosynthesis pathways.
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