Abstract
Several metals in soil affect the production of secondary metabolites in medicinal plants. In this study, we have determined concentrations of K, Mn, Fe, Zn, Cu in soils collected at Tinh Bien, Tri Ton, Thoai Son, and Cam Mountain areas in An Giang province by X-Ray Fluorescence Spectroscopy (XRF). We simultaneously evaluated the total phenolic and flavonoid content of methanol extracts from Solanum torvum (Sw.) leaves and Zingiber zerumbet (L.) rhizomes harvested in Tinh Bien and Cam Mountain. The results showed that the concentrations of metals reached the highest values at the soil particle size 0.25 mm among three sizes: 0.25 mm, 1 mm, and 2 mm. Whereas, the metal contents at two sampling depths 0-15 cm and 15-30 cm were similar. The concentrations of K and Cu in the soil in Tinh Bien are higher than Cam Mountain at 1.18 times and 1.70 times; however, the Fe, Zn, Mn content in Tinh Bien is lower at 2.16 times, 1.64 times, and 1.43 times. Thereby, it can be seen that the higher concentration of K and Cu may contribute to increasing the total phenolic content about 1.8 times with the Zingiber zerumbet (L.) rhizomes sample, and the flavonoid content by 2.5 times for the Solanum torvum (Sw.) leaves sample in Tinh Bien compared to Cam Mountain. Meanwhile, the concentrations of Fe, Zn, and Mn did not affect the flavonoid and phenolic content in these two plants
Highlights
We simultaneously evaluated the total phenolic and flavonoid content of methanol extracts from Solanum torvum (Sw.) leaves and Zingiber zerumbet (L.) rhizomes harvested in Tinh Bien and Cam Mountain
The results showed that the concentrations of metals reached the highest values at the soil particle size 0.25 mm among three sizes: 0.25 mm, 1 mm, and 2 mm
Research ArticleNguyen Minh Hien1,*, Pham Tan Thi[2], Huynh Thi Kim Ngan[2], Nguyen Thi Yen Nhi[2], Nguyen Thi Dung[3], Le Minh Tri[1]
Summary
Nguyễn Minh Hiền1,*, Phạm Tấn Thi[2], Huỳnh Thị Kim Ngân[2], Nguyễn Thị Yến Nhi[2], Nguyễn Thị Dung[3], Lê Minh Trí[1]. Nhóm đã tiến hành khảo sát hàm lượng các nguyên tố K, Mn, Fe, Zn, Cu trong đất ở các vùng Tịnh Biên, Núi Cấm, Tri Tôn, Thoại Sơn thuộc tỉnh An Giang bằng phương pháp phổ huỳnh quang tán xạ tia X (XRF). Nhóm cũng đã xác định hàm lượng flavonoid, phenolic toàn phần của các mẫu cao chiết trong methanol của lá Cà dại hoa trắng (Solanum torvum Sw. họ Cà Solanaceae) và thân rễ Gừng gió (Zingiber zerumbet (L.) Roscoe ex Sm. họ Gừng Zingiberaceae) ở hai vùng Tịnh Biên và Núi Cấm. Kết quả cho thấy hàm lượng các nguyên tố kim loại trong đất đạt giá trị cao nhất ở kích thước hạt 0,25 mm trong 3 kích thước hạt 0,25 mm, 1 mm và 2 mm được khảo sát. Từ khoá: XRF, nguyên tố vi lượng, nguyên tố đa lượng, phenolic toàn phần, flavonoid toàn phần
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