Variations of the chemical composition of Citrus sinensis Osbeck cv. Newhall fruit in relation to the symptom severity of Huanglongbing

Abstract In this study, the chemical compositions of Huanglongbing-symptomatic (HLB-SY) and Huanglongbing-asymptomatic (HLB-AS) Newhall navel oranges were comprehensively studied. Our results indicated that the orange juice of HLB-SY contained fewer amounts of TSS (total soluble solids), fructose, glucose, sucrose and Vc (vitamin C), while having more limonin and TA (titratable acidity) when compared to the respective one in HLB-AS juice, which was consistent with most of the previous reports. The hesperidin and didymin, however, were significantly (p