Differential abilities of Korean soybean varieties to biosynthesize glyceollins by biotic and abiotic elicitors
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Glyceollins synthesized in soybeans that are exposed to biotic or abiotic stress have been reported to have health benefits. Considering that glyceollins are de novo synthesized from daidzein via several enzymatic steps and that isoflavone concentration widely varies among soybean varieties, the abilities of 60 soybean cultivars to synthesize glyceollins were compared under different elicitation conditions. Soybeans accumulated glyceollins differentially depending upon the cultivar when elicited with Aspergillus sojae. Contrary to our hypothesis that high isoflavone varieties may accumulate glyceollins more efficiently upon elicitation, glyceollin accumulation in response to fungal elicitation was not related with the concentration of either total isoflavones or daidzein in soybeans. Rather the glyceollin levels were significantly affected by soybean cultivar and most effectively increased by fungal infection. The data suggest that the selection of a strong fungal elicitor and a soybean cultivar with genotype that highly expresses the genes involved in glyceollin biosynthesis is essential for efficient glyceollin production.
Keywordsglyceollins soybean cultivar elicitor phytoalexins isoflavones
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- 9.Zahringer U, Ebel J, Grisebach H. Induction of phytoalexin synthesis in soybean. Elicitor-induced increase in enzyme activities of flavonoid biosynthesis and incorporation of mevalonate into glyceollin. Arch. Biochem. Biophys. 188: 450–455 (1978)Google Scholar
- 12.Boue SM, Shih FF, Shih BY, Daigle KW, Carter-Wientjes CH, Cleveland TE. Effect of biotic elicitors on enrichment of antioxidant properties and induced isoflavones in soybean. J. Food Sci. 73: H43–H49 (2008)Google Scholar
- 13.Cline K, Wade M, Albersheim P. Host-Pathogen Interactions: XV. Fungal glucans which elicit phytoalexin accumulation in soybean also elicit the accumulation of phytoalexins in other plants. Plant Physiol. 62: 918–921 (1978)Google Scholar
- 20.Salvo VA, Boue SM, Fonseca JP, Elliott S, Corbitt C, Collins-Burow BM, Curiel TJ, Srivastav SK, Shih BY, Carter-Wientjes C, Wood CE, Erhardt PW, Beckman BS, McLachlan JA, Cleveland TE, Burow ME. Antiestrogenic glyceollins suppress human breast and ovarian carcinoma tumorigenesis. Clin. Cancer Res. 12: 7159–7164 (2006)CrossRefGoogle Scholar