註釋 Carambola (starfruit) and citrus are essential fruit crops in Florida, holding significant commercial value. Improving carambola flavors is crucial for enhancing fruit quality, necessitating a deep understanding of the metabolic mechanisms responsible for aroma and taste. Meanwhile, the global citrus industry is under threat from Huanglongbing (HLB), creating an urgent need to find a cure. To address these challenges, understanding the metabolic mechanisms behind fruit flavors and plant diseases is essential for breeding competitive crop varieties. In the first study, an integration of volatilomics and metabolomics method was employed to investigate the volatile and non-volatile metabolites contributing to the flavor variation of five carambola cultivars. The enrichment analysis of important metabolites revealed several flavor-related pathways, such as amino acids, terpenoids, and flavonoids. Differences in flavor traits among carambola cultivars were related to the up- or down-regulation of metabolites within these pathways. These findings provide valuable insights for developing carambola cultivars with more appealing flavor profiles. The second study established an integrated analysis of untargeted metabolomics and microbiomics data for HLB-sensitive and HLB-tolerant citrus cultivars. This multi-omics approach explored the interactions between plant metabolism and plant-associated bacteria during HLB development. By applying machine learning models, differentially 