Inducibly-formed isoflavonoids from leaves of soybean

Ingham, John L.; Keen, N. T.; Mulheirn, L. J.; Lyne, R.L.

doi:10.1016/0031-9422(81)85177-1

Cited by 74 publications

(43 citation statements)

References 12 publications

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“…Some fractions also showed phagostimulant activity. TLC results for PI 227687 leaf extractables in five solvent systems (Table l), including ones used in previous classical analyses of such chemicals from soya beans (Keen et al 1972;Ingham et al 1981) and the overall bioassay results (Tables 2-5) support the concept that specific flavonoids, daidzein, the unidentified flavonoid X2 (R, 0.19), coumestrol, sojagol and the glyceollins, act as antifeedants and/or antibiotics against this insect. Carotenoid A and chlorophyll A fractions also showed some antifeedant and/or antibiotic effects at the dosages tested.…”

Section: Discussionmentioning

confidence: 51%

Chemical basis of resistance in soya bean to cabbage looper, Trichoplusia ni

Sharma

Norris

1991

J Sci Food Agric

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Section: Discussionmentioning

confidence: 51%

Chemical basis of resistance in soya bean to cabbage looper, Trichoplusia ni

Sharma

Norris

1991

J Sci Food Agric

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“…Glycinol and glyceollidin I are precursors of glyceollin. Glyceollidin 11 can also be elicited in soybean leaves treated with sodium iodoacetate or Pseudomonas syringae bv pisi (Ingham et al, 1981). These same red pigments are responsible for the bright-red coloration of race-specific incompatible interactions of soybean with P. sojae.…”

Section: In the Presence Of Wound Exudate Pwg Lnduces The Sequentialmentioning

confidence: 95%

“…A wide range of organic and inorganic sulfhydrylmodifying reagents possess elicitor activity in various plant species (see, for example, Yoshikawa, 1978;Ingham et al, 1981;Osman and Fett, 1983;Stossel, 1984), although the effects of these molecules on elicitation in soybean appear to be indirect . Due to these activities, the biological sulfhydryl molecule glutathione has also been investigated as a potential defense-related signal.…”

Section: Gsh Partially Restores Elicitor Competencymentioning

confidence: 99%

Signaling in Soybean Phenylpropanoid Responses (Dissection of Primary, Secondary, and Conditioning Effects of Light, Wounding, and Elicitor Treatments)

Graham

1996

Plant Physiol.

125

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“…Braga, personal communication). This color in soybean tissues results from the accumulation of certain glyceollin precursors following exposure to various biotic and abiotic factors (Ingham et al, 1981;Zähringer et al, 1981), and its intensity is proportional to the phytoalexin content (Ayers et al, 1976b). Glyceollin precursors that have a red coloration include glycinol and the isoprenylated compounds glyceolidin I and II (Ingham et al, 1981;Zähringer et al, 1981).…”

mentioning

confidence: 99%

Nitric Oxide Synthase-Mediated Phytoalexin Accumulation in Soybean Cotyledons in Response to the Diaporthe phaseolorumf. sp. meridionalis Elicitor

et al. 2002

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Phytoalexin biosynthesis is part of the defense mechanism of soybean (Glycine max) plants against attack by the fungus Diaporthe phaseolorum f. sp. meridionalis (Dpm), the causal agent of stem canker disease. The treatment of soybean cotyledons with Dpm elicitor or with sodium nitroprusside (SNP), a nitric oxide (NO) donor, resulted in a high accumulation of phytoalexins. This response did not occur when SNP was replaced by ferricyanide, a structural analog of SNP devoid of the NO moiety. Phytoalexin accumulation induced by the fungal elicitor, but not by SNP, was prevented when cotyledons were pretreated with NO synthase (NOS) inhibitors. The Dpm elicitor also induced NOS activity in soybean tissues proximal to the site of inoculation. The induced NOS activity was Ca 2ϩ -and NADPH-dependent and was sensitive to the NOS inhibitors N G -nitro-l-arginine methyl ester, aminoguanidine, and l-N 6 -(iminoethyl) lysine. NOS activity was not observed in SNPelicited tissues. An antibody to brain NOS labeled a 166-kD protein in elicited and nonelicited cotyledons. Isoflavones (daidzein and genistein), pterocarpans (glyceollins), and flavones (apigenin and luteolin) were identified after exposure to the elicitor or SNP, although the accumulation of glyceollins and apigenin was limited in SNP-elicited compared with fungal-elicited cotyledons. NOS activity preceded the accumulation of these flavonoids in tissues treated with the Dpm elicitor. The accumulation of these metabolites was faster in SNP-elicited than in fungal-elicited cotyledons. We conclude that the response of soybean cotyledons to Dpm elicitor involves NO formation via a constitutive NOS-like enzyme that triggers the biosynthesis of antimicrobial flavonoids.

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Inducibly-formed isoflavonoids from leaves of soybean

Cited by 74 publications

References 12 publications

Chemical basis of resistance in soya bean to cabbage looper, Trichoplusia ni

Chemical basis of resistance in soya bean to cabbage looper, Trichoplusia ni

Signaling in Soybean Phenylpropanoid Responses (Dissection of Primary, Secondary, and Conditioning Effects of Light, Wounding, and Elicitor Treatments)

Nitric Oxide Synthase-Mediated Phytoalexin Accumulation in Soybean Cotyledons in Response to the Diaporthe phaseolorumf. sp. meridionalis Elicitor

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