Effect of Nitrate Concentration on the Growth, Bolting and Related Gene Expression in Flowering Chinese Cabbage

Nitrogen concentration affects growth and bolting of plants, but its regulation mechanism is still unclear. In this work, three nitrate treatments (5%, 100%, 200%) in nutrient solution were conducted to explore the internal relationship between nitrogen flowering Chinese cabbage. The results showed that time was earlier under treatment with low and, lower concentration, flowering. Low-nitrate reduced content nitrate, soluble protein, free amino acid total nitrogen, increased C/N ratio. ratio significantly negatively correlated plant height, stem thickness biomass, while it positively rate. Thus, indicated may affect by regulating cabbage plants. expression flowering-related genes (SOC1, LFY) treatment. addition, pith cell area at tip treatment, resulting a significant decrease thickness. cyclin- expansin-related (CYCD3-3, CYCB1-1 EXPA8) reduced, which regulate development genes.