Abstract:Celery(Apium graveolens L.), a leaf vegetable, is a biennial herb in Apiaceae. Soluble sugar is an important nutritional component of leafy vegetable crops. In this study, two celery cultivars of ‘Sijixiaoxiangqin’ and ‘Liuhehuangxinqin’ were selected as samples. The soluble sugar content was determined and analyzed after storage at room temperature (25 ℃), low temperature (4 ℃) and room temperature in the dark (25 ℃) for 0, 6, 24, 30, 48 and 54 h. The expression characteristics of soluble sugar metabolism-related genes (AgIVR1, AgSPP, AgSPS, AgSS1 and AgUDPG ) were detected by real-time quantitative PCR technology. The results showed that there were varietal and tissue differences in the soluble sugar content of celery under the three storage conditions. The soluble sugar content in ‘Sijixiaoxiangqin’ was higher than that in ‘Liuhehuangxinqin’, and the soluble sugar content in the petioles was higher than that in the leaves. The soluble sugar content had no obvious change under different storage conditions. After storage at low temperature for 54 h, the expression levels of AgSS1 in both celery cultivars increased significantly, and the overall expression level of AgSPS in celery exhibited a downward trend under different storage conditions. Diverse genes might co-regulate the change in soluble sugar content through interaction during celery storage. The accumulation of soluble sugar was correlated with the changes in related genes.
