FIGURE 10 A-hederagenin content of A. trifoliata in different habitats
3.5  | Comprehensive analysis of secondary metabolites of A. trifoliata in rocky desertification habitat
Principal component analysis can transform many original indexes into comprehensive indexes for analysis, which can comprehensively reflect the response degree of plants to rocky desertification habitat. Principal component analysis of secondary metabolites of A. trifoliata from two bases was carried out according to the principle of eigenvalue greater than 1 (Figure 11). The main components of Guanling base are oleanolic acid and total phenol; The main components of Huaxi base are flavonoids and total phenols. Comprehensive analysis showed that the main response factor of secondary metabolites of A. trifoliata in rocky desertification habitat was total phenol.