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Involvement of Oxidative Processes in the Signaling Mechanisms Leading to the Activation of Glyceollin Synthesis in Soybean (Glycine max).

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The efficiency of hydroperoxides (tert-butyl hydroperoxide, hydrogen peroxide) and sulfhydryl reagents (iodoacetamide, p-chloromercuribenzene sulfonic acid) as glyceollin elicitors was examined in relation to sulfhydryl oxidation, or alteration, and to lipid peroxidation, in 3-d-old soybean

Metabolic Regulation during Glyceollin Biosynthesis in Green Soybean Hypocotyls.

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The accumulation of the isoflavonoid phytoalexin, glyceollin, occurs in hypocotyls of green soybean seedlings (Glycine max L. Merr. cv Harosoy 63) in response to the injection of a glucan elicitor isolated from the mycelial walls of the fungus, Phytophthora megasperma f. sp. glycinea. This

Cyclic [beta]-1,6-1,3-Glucans of Bradyrhizobium japonicum USDA 110 Elicit Isoflavonoid Production in the Soybean (Glycine max) Host.

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High levels of cyclic [beta]-1,6-1,3-glucans (e.g. 0.1 mg mg-1 of total protein) are synthesized by free-living cells as well as by bacteroids of Bradyrhizobium japonicum USDA 110 (K.J. Miller, R.S. Gore, R. Johnson, A.J. Benesi, V.N. Reinhold [1990] J Bacteriol 172: 136-142; R.S. Gore and K.J.

[Isolation and identification of glycinol from Glycine max [L.] Merri].

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As one of the main phytoalexins and phytoestrogens, glyceollin is an important prenylflavonoid in Glycine max [L.] Merri. (soybean). Many kinds of elicitors can be used to induce its accumulation. Its biosynthesis pathway is commonly used to study the characteristics of prenyltransferase, which

Effects of R-(1-amino-2-phenylethyl)phosphonic acid on glyceollin accumulation and expression of resistance to Phytophthora megasperma f.sp. glycinea in soybean.

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(R)-(1-Amino-2-phenylethyl)phosphonic acid (R-APEP), an inhibitor of phenylalanine ammonia-lyase (PAL), was applied to the tap root of 42-h-old soybean (Glycine max. (L.) Merrill cv. Harosoy 63) seedlings during inoculation with zoospores of the incompatible race 1 of Phytophthora megasperma f.sp.

Regulation by sulfhydryl groups of glyceollin accumulation in soybean hypocotyls.

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Hypocotyls of 5-d-old etiolated soybean seedlings (Glycine max (L.) Merr. cv. Altona) were treated with (a) dithiothreitol (DTT) or one of the sulfhydryl-binding reagents N-ethylmaleimide (NEM), p-hydroxymercuribenzoate (PMB) und p-chloromercuribenzene sulfonic acid (PMBS), (b) one of the sulfhydryl

Effect of spores of saprophytic fungi on phytoalexin accumulation in seeds of frog-eye leaf spot and stem canker-resistant and -susceptible soybean (Glycine max L.) cultivars.

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Two saprophytic fungi (Mucor ramosissimus and Rhizopus sp.) were tested for their ability to induce phytoalexin production by seeds of frog-eye leaf spot and stem canker-resistant and -susceptible soybean (Glycine max L.) cultivars. Only M. ramosissimus was shown to elicit a response and qualitative

Novel process of fermenting black soybean [Glycine max (L.) Merrill] yogurt with dramatically reduced flatulence-causing oligosaccharides but enriched soy phytoalexins.

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Black soybeans [Glycine max (L.) Merrill] were germinated under fungal stress with food grade R. oligosporus for 3 days and were homogenized and fermented with lactic acid bacteria (LAB) to produce soy yogurt. Fungal stress led to the generation of oxylipins [oxooctadecadienoic acids (KODES) isomers

Development of a radioimmunoassay for the soybean phytoalexin glyceollin I.

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A radioimmunoassay for glyceollin I, the major phytoalexin produced by soybean (Glycine max [L.] Merr.), has been developed. Antibodies were raised in rabbits against a glyceollin I-bovine serum albumin conjugate. The antisera were used to establish a radioimmunoassay for glyceollin I using

Molecular Characterization of Soybean Pterocarpan 2-Dimethylallyltransferase in Glyceollin Biosynthesis: Local Gene and Whole-Genome Duplications of Prenyltransferase Genes Led to the Structural Diversity of Soybean Prenylated Isoflavonoids.

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Soybean (Glycine max) accumulates several prenylated isoflavonoid phytoalexins, collectively referred to as glyceollins. Glyceollins (I, II, III, IV and V) possess modified pterocarpan skeletons with C5 moieties from dimethylallyl diphosphate, and they are commonly produced from (6aS,

Glyceollin I in soybean-cyst nematode interactions : spatial and temporal distribution in roots of resistant and susceptible soybeans.

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Accumulation of the phytoalexin glyceollin I in roots of soybean (Glycine max [L.] Merr.) following inoculation with race 1 of Heterodera glycines Ichinohe, the soybean cyst nematode (SCN), was determined in a whole-root system by high performance liquid chromatography (HPLC) and in a cross-section

Glyceollin Transcription Factor GmMYB29A2 Regulates Soybean Resistance to Phytophthora sojae.

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Glyceollin isomers I, II, and III are the major pathogen-elicited secondary metabolites (i.e. phytoalexins) of soybean (Glycine max) that, collectively with other 5-deoxyisoflavonoids, provide race-specific resistance to Phytophthora sojae. The NAC-family transcription factor (TF) GmNAC42-1 is an

Quantitative Localization of the Phytoalexin Glyceollin I in Relation to Fungal Hyphae in Soybean Roots Infected with Phytophthora megasperma f. sp. glycinea.

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A radioimmunoassay specific for glyceollin I was used to quantitate this phytoalexin in roots of soybean (Glycine max [L.] Merr. cv Harosoy 63) after infection with zoospores of either race 1 (incompatible) or race 3 (compatible) of Phytophthora megasperma Drechs. f. sp. glycinea Kuan and Erwin. The

The NAC family transcription factor GmNAC42-1 regulates biosynthesis of the anticancer and neuroprotective glyceollins in soybean.

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Glyceollins are isoflavonoid-derived pathogen-inducible defense metabolites (phytoalexins) from soybean (Glycine max L. Merr) that have important roles in providing defense against pathogens. They also have impressive anticancer and neuroprotective activities in mammals. Despite their

Molecular cloning and characterization of a cDNA for pterocarpan 4-dimethylallyltransferase catalyzing the key prenylation step in the biosynthesis of glyceollin, a soybean phytoalexin.

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Glyceollins are soybean (Glycine max) phytoalexins possessing pterocarpanoid skeletons with cyclic ether decoration originating from a C5 prenyl moiety. Enzymes involved in glyceollin biosynthesis have been thoroughly characterized during the early era of modern plant biochemistry, and many genes

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