FIGURE 9 Oleanolic acid content of A. trifoliata in different habitats
Note: a: Guanling base; b: Huaxi base. The same below.
It can be seen from Figure10 that with the growth and development ofA. trifoliata , the content of α-hederagenins in roots and stems showed a trend of first increasing and then decreasing, while in leaves it fluctuated frequently and irregularly, and the content of α-hederagenins in stems > leaves > roots. At the same time, the increasing rate of oleanolic acid content in rocky desertification habitat was faster, and the content was significantly higher than that in normal habitat. In Guanling base, the difference of root was the biggest in July, increased by 4 mg·g-1, stem was the biggest in October, increased by 13 mg·g-1, leaf was the biggest in June, increased by 6 mg·g-1; In Huaxi base, the difference of root was the biggest in May, increased by 3 mg·g-1, stem was the biggest in September, increased by 4 mg·g-1, leaf was the biggest in August, increased by 10 mg·g-1. In conclusion, the content of α-hederagenins in roots, stems and leaves ofA. trifoliata could be increased in rocky desertification habitat.