Allelopathic tannins from guyabano (Annona muricata L.) leaf extract against the rice weed Echinochloa crus-galli [manuscript]
| dc.contributor.author | Espiritu, Andrei Philsen Nuque | |
| dc.date.accessioned | 2026-05-21T00:39:59Z | |
| dc.date.available | 2026-05-21T00:39:59Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | Background: Allelopathy is a biological phenomenon where one plant inhibits the growth of another. The application of the allelopathic properties of some plants is a natural and environment-friendly approach which increases crop yields, decreases our dependence on synthetic herbicides, and improves the ecological environment. This study aimed to extract the tannins from Annona muricata L. leaves and determine the allelopathic effect on the germination and seedling growth of the rice weed, Echinochloa crus-galli. Methods: The dried powdered leaves of Annona muricata L. were extracted using 80% ethanol. Tannins were extracted with 50% acetone using column chromatography. Phytochemical analyses (FeCl3 test, gelatin test and TLC) on the crude extract and fractions were done to confirm the presence of tannins. The total tannin content on the leaves of Annona muricata L. was also determined. The tannin fraction was characterized by UV-Vis and IR spectrophotometry. The allelopathic effect of the tannin fraction of Annona muricata L. on the seed germination and seedling growth of Echinochloa crus-galli rice weed was also noted: Results: The total tannin content of the fraction was 25.33±00 mg GAE g -1. The tannin present was probably and elligitannin based from the UV-Vis and FTIR Spectroscopy. The percent germination was 66.67±5.77% and 0 in all treatments. Highest inhibitory effect on the seedling growth was observed in the 8 and 10 mg/mL fractions. However, no significant differences on the tannin fractions were observed but showed significant difference from the control. Conclusion: The probable ellagitannin from guyabano leaves inhibits seed germination and seedling growth of the rice weed, Echinochloa crus-galli and has the potential as a weedicide. | |
| dc.identifier.uri | http://granarium.clsu.edu.ph/handle/123456789/1347 | |
| dc.language.iso | en_US | |
| dc.relation.supervisor | Rosalie R. Rafael, Ph.D. | |
| dc.title | Allelopathic tannins from guyabano (Annona muricata L.) leaf extract against the rice weed Echinochloa crus-galli [manuscript] |