FIGURE 3 Tannin content of A. trifoliata in different habitats
Note: A: Root organs of A. trifoliata in Guanling base; B: Stem organs of A. trifoliata in Guanling base; C: The leaf organs ofA. trifoliata in Guanling base; D: Root organs of A. trifoliata in Huaxi base; E: Stem organs of A. trifol\iata in Huaxi base; F: The leaf organs ofA. trifoliata in Huaxi base. * is 5% significant, ** is 1% significant. The same below.
As shown in Figure 4, with the growth and development of A. trifoliata , the content of flavonoids in roots, stems and leaves showed an upward trend. At the same time, the increase rate of flavonoids content in roots and stems of A. trifoliata in rocky desertification habitat was faster than that in normal habitat, especially in the roots, while the flavonoids content in leaves was lower than that in normal habitat. In Guanling base, the difference of roots was the biggest in October, increased by 1.35 times, stems was the biggest in July, increased by 1.13 times, leaves was the biggest in September, decreased by 1.19 times; In Huaxi base, the difference of roots was the biggest in October, increased by 1.61 times, stem was the biggest in October, increased by 1.20 times, leaf was the biggest in June, decreased by 0.79 times. In conclusion, rocky desertification habitat can increase the content of flavonoids in roots and stems ofA. trifoliata , but reduce the content of flavonoids in leaves.