Total flavonoid content of faloak (Sterculia quadrifida) bark in varieties of bark colour tree diameter and growth altitude

Siswadi S., . and Faridah E., . and Hertiani T, . Total flavonoid content of faloak (Sterculia quadrifida) bark in varieties of bark colour tree diameter and growth altitude. pp. 298-307. ISSN 0128-1283

Sterculia quadrifida (Sterculiaceae) grows in Indonesia India Timor Leste and Australia. In East Nusa Tenggara province Indonesia particularly in Timor Island S. quadrifida is called faloak and its bark is used to treat hepatitis. This study aims to determine the correlation between total flavonoid content and varieties of bark colour tree diameter class and altitudes and to examine the interaction between tree diameter class and altitudes in terms of flavonoid content. Sterculia quadrifida barks were collected from four altitude strata of 300 300“600 600“900 and 900 m a.s.l. Each stratum of altitude consisted of three diameter classes of 15 15“30 and 30 cm. Bark colour was classified using Munsell colour chart. The powdered barks were macerated with 96 ethanol and evaporated to yield thick extracts. The total flavonoid content of each extract was measured by spectrophotometry. There were four dominant colour groups i.e. red brown yellow and orange. The highest total flavonoid content was found in the red (0.25) and yellow (0.25) barks. The results showed that the highest total flavonoid content was found in tree diameter of 15“30 cm with a total flavonoid of 0.22. The highest total flavonoid content (0.21) was observed in the barks from altitude range of 300 m a.s.l. There was a weak interaction between altitude and tree diameter on the extract yield and total flavonoid of S. quadrifida bark.

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Abstract

Sterculia quadrifida (Sterculiaceae) grows in Indonesia India Timor Leste and Australia. In East Nusa Tenggara province Indonesia particularly in Timor Island S. quadrifida is called faloak and its bark is used to treat hepatitis. This study aims to determine the correlation between total flavonoid content and varieties of bark colour tree diameter class and altitudes and to examine the interaction between tree diameter class and altitudes in terms of flavonoid content. Sterculia quadrifida barks were collected from four altitude strata of 300 300“600 600“900 and 900 m a.s.l. Each stratum of altitude consisted of three diameter classes of 15 15“30 and 30 cm. Bark colour was classified using Munsell colour chart. The powdered barks were macerated with 96 ethanol and evaporated to yield thick extracts. The total flavonoid content of each extract was measured by spectrophotometry. There were four dominant colour groups i.e. red brown yellow and orange. The highest total flavonoid content was found in the red (0.25) and yellow (0.25) barks. The results showed that the highest total flavonoid content was found in tree diameter of 15“30 cm with a total flavonoid of 0.22. The highest total flavonoid content (0.21) was observed in the barks from altitude range of 300 m a.s.l. There was a weak interaction between altitude and tree diameter on the extract yield and total flavonoid of S. quadrifida bark.

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Item Type:	Article
AGROVOC Term:	Sterculia
AGROVOC Term:	Sterculiaceae
AGROVOC Term:	Extraction in chemical analysis
AGROVOC Term:	Spectrophotometry
AGROVOC Term:	Bark extracts
AGROVOC Term:	Diameter
AGROVOC Term:	Growth
AGROVOC Term:	Altitude
AGROVOC Term:	Colour
AGROVOC Term:	Flavonoids
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10042

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