Effects of Different Altitudes on Effective Components in Branches and Leaves of Caragana jubata
This study investigates the effects of altitude gradients on the effective components of Caragana jubata(Pall.)Poir.branches and leaves in the Liupan Mountain.UV spectrophotometry was used to determine the content of total flavonoids,and HPLC was used to determine the content of formononetin in the branches and leaves of Caragana jubata(Pall.)Poir.The results showed that the contents of total flavonoids and formononetin in branches of Caragana jubata(Pall.)Poir.increased with the increase in altitude,peaking at 2 920 m.In contrast,the contents of total flavonoids and formononetin in leaves first increased and then decreased with the increase in altitude,peaking at 2 680 m.The contents of total flavonoids and formononetin in branches and leav-es of Caragana jubata(Pall.)Poir.were significantly different at different altitudes.In conclusion,altitude sig-nificantly affects the contents of flavonoids and formononetin in the branches and leaves of Caragana jubata(Pall.)Poir.A high altitude of 2 920 m is conducive to the accumulation of total flavonoids and formononetin in branches,whereas an altitude of 2 680 m is optimal for leaves.
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