Effect of Zn, B Fertilization on Flavonoids Accumulation in Spatholobus suberectus Dunn.

Abstract:

In order to understand the effects of Zn, B fertilization on flavonoids accumulation in Spatholobus suberectus Dunn., the changes in contents of flavonoid and soluble protein, PAL activity were studied by using foliage spray. The results showed that the soluble protein content, PAL activity and total flavones content of S. suberectus increased spraying Zn, B fertilization. The soluble protein content was the highest for 0.89% treated with 50 mg L^-1 ZnSO₄ +10 mg L^-1 Na₂B₄O₇·10H₂O. The total flavones content and PAL activity were the highest, for 4.65% and 29.47 U g^-1 min^-1, respectively, when S. suberectus were treated with 25 mg L^-1 ZnSO₄+50 mg L^-1 Na₂B₄O₇·10H₂O. Therefore, reasonabe fertilization of Zn, B could promote the accumulation of flavonoids in S. suberectus.

Key words:Spatholobus suberectus;Zn;B;Total flavones