Structure–biological activity relationships in triterpenic saponins: the relative activity of protobassic acid and its derivatives against plant pathogenic fungi
- 29 March 2010
- journal article
- research article
- Published by Wiley in Pest Management Science
- Vol. 66 (8), 825-831
- https://doi.org/10.1002/ps.1947
Abstract
BACKGROUND: Triterpenic saponins from Sapindus mukorossi Gaertn. and Diploknema butyracea JF Gmelin were evaluated for in vitro antifungal activity against four phytopathogenic fungi. The study of the structure–antifungal activity relationships of protobassic acid saponins was widened by including semi-synthetic derivatives. RESULTS: Diploknema butyracea saponins exhibited significant antifungal activity against three fungi (ED50 230–455 µg mL−1), whereas S. mukorossi saponin was effective against two fungi (ED50 181–407 µg mL−1). The n-butanol extract after preparative HPLC separation provided two saponins from D. butyracea saponin mixture: 3-O-[β-D-glucopyarnosyl-β-D-glucopyranosyl]-16-α-hydroxyprotobassic acid-28-O-[arabinopyranosyl-glucopyranosyl-xylopyranosyl]-arabinopyranoside (MI-I), and 3-O-β-D-glucopyranosyl-glucopyranosyl-glucopyranosyl-16-α-hydroxyprotobassic acid-28-O-[arabinopyranosyl-xylopyranosyl-arabinopyranosyl]-apiofuranoside (MI-III). The single saponin extracted from S. mukorossi saponin mixture was identified as 3-O-[O-acetyl-β-D-xylopyranosyl-β-D-arabinopyranosyl-β-D-rhamnopyranosyl] hederagenin-28-O[β-D-glucopyranosyl-β-D-glucopyranosyl-β-D-rhamnopyranosyl] ester (SM-I). Monodesmosides resulting from the partial degradation of hederagenin and hydroxyprotobassic acid bisdesmosides exhibited significant reduction in antifungal effect. Further removal of sugar moiety yielded complete loss in activity. The antifungal activity of the triterpenic saponins was associated with their aglycone moieties, and esterification of the hydroxyl group led to change in antifungal activity. CONCLUSION: Sapindus mukorossi saponin, which is effective against Rhizoctonia bataticola (Taub.) Briton Jones and Sclerotium rolfsii Sacc., can be exploited for the development of a natural fungicide. A sugar moiety is a prerequisite for the antifungal activity of triterpenic saponin. Copyright © 2010 Society of Chemical IndustryKeywords
This publication has 20 references indexed in Scilit:
- Screening for Feeding Deterrent and Insect Growth Regulatory Activity of Triterpenic Saponins from Diploknema butyracea and Sapindus mukorossiJournal of Agricultural and Food Chemistry, 2009
- Triterpenoid saponins from the fruits and galls of Sapindus mukorossiPhytochemistry, 2008
- Antifungal Activity of C-27 Steroidal SaponinsAntimicrobial Agents and Chemotherapy, 2006
- Madhucosides A and B, Protobassic Acid Glycosides from Madhuca indica with Inhibitory Activity on Free Radical Release from PhagocytesJournal of Natural Products, 2004
- Two New Antifungal Saponins from the Tibetan Herbal MedicineClematis tanguticaPlanta Medica, 2003
- Composition and Antimicrobial Activity of the Essential Oils of Two Origanum SpeciesJournal of Agricultural and Food Chemistry, 2001
- Antifungal Activity of Modified Hederagenin Glycosides from the Leaves of Kalopanax pictum var. chinense.Biological & Pharmaceutical Bulletin, 2001
- Recent Advances in Saponins Used in Foods, Agriculture, and MedicinePublished by Taylor & Francis Ltd ,1999
- In VitroAntifungal Activity of Triterpenoid SaponinsPlanta Medica, 1994
- Structure-Biological Activity Relationships in Alfalfa Antimycotic Saponins: The Relative Activity of Medicagenic Acid and Synthetic Derivatives Thereof Against Plant Pathogenic FungiJournal of Phytopathology, 1989