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1Author    DavidJ. Robeson, JeffreyB. HarborneRequires cookie*
 Title    Pisatin as a Major Phytoalexin in L a ih y ru s  
 Abstract    The pterocarpan pisatin has been identified as a major phytoalexin in fifteen species of Lathyrus. Thus, the genus is closer in its phytoalexin response to Pisum than to Vicia, which is known to produce furanoacetylenes on fungal in­ vasion. 
  Reference    (Z. Naturforsch. 32c, 289 [1977]; received December 13 1976) 
  Published    1977 
  Keywords    Leguminosae, Lathyrus, Phytoalexins, Pterocarpans, Pisatin 
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 TEI-XML for    default:Reihe_C/32/ZNC-1977-32c-0289_n.pdf 
 Identifier    ZNC-1977-32c-0289_n 
 Volume    32 
2Author    JohnL. Ingham, PaulM. DewickRequires cookie*
 Title      
 Abstract    In response to fungal inoculation the leaves of Trifolium arvense accumulate the known isoflavonoid phytoalexins, medicarpin, maackiain, sativan, vestitol, and isovestitol. A previously undescribed isoflavan derivative (arvensan; 7,2'-dimethoxy-4'-hydroxyisoflavan) is also produced by this species. The identification and synthesis of arvensan is described. 
  Reference    (Z. Naturforsch. 32c, 446 [1977]; received February 25 1977) 
  Published    1977 
  Keywords    Leguminosae, Trifolium, Isoflavans, Pterocarpans, Phytoalexins 
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 TEI-XML for    default:Reihe_C/32/ZNC-1977-32c-0446_n.pdf 
 Identifier    ZNC-1977-32c-0446_n 
 Volume    32 
3Author    JohnL. InghamRequires cookie*
 Title    Isoflavonoid Phytoalexins of P arochetus co m m u n is and F a ctorovskya aschersoniana  
 Abstract    Medicarpin has been isolated as a phytoalexin from the fungus-inoculated leaflets of Parochetus communis and Fac­ torovskya aschersoniana; a second isoflavonoid derivative, vestitol, is also produced by F. aschersoniana. Some taxono­ mic aspects of phytoalexin formation by the title species are briefly discussed. 
  Reference    Z. Naturforsch. 34c, 290—292 (1979); received December 4 1978 
  Published    1979 
  Keywords    Leguminosae, Parochetus, Factorovskya, Isoflavonoids, Phytoalexins 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0290_n.pdf 
 Identifier    ZNC-1979-34c-0290_n 
 Volume    34 
4Author    JohnL. InghamRequires cookie*
 Title    of the Genus Caragana  
 Abstract    The fungus-inoculated leaflets of 39 Caragana species have been found to variously produce five isoflavonoid phytoalexins including the known pterocarpan derivatives, medicarpin, maackiain, variabilin and pisatin. Small quan­ tities of a previously undescribed C-methylated pterocarpan were obtained from leaflets of C. acanthophylla. 
  Reference    Z. Naturforsch. 34c, 293 (1979); received December 4 1978 
  Published    1979 
  Keywords    Leguminosae, Caragana, Isoflavonoids, Pterocarpans, Phytoalexins 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0293_n.pdf 
 Identifier    ZNC-1979-34c-0293_n 
 Volume    34 
5Author    JohnL. InghamRequires cookie*
 Title    Isoflavonoid Phytoalexins of Yam Bean (Pachyrrhizus erosus)  
 Abstract    The furanopterocarpan, neodunol, has been isolated as a major phytoalexin from the fungus-inoculated stems o f Pachyrrhizus erosus. N eodunol is accompanied by small quantities o f dem -ethylmedicarpin and a third compound provisionally identified as the prenylated pterocarpan, ho-moedudiol; traces o f a neodunol isomer were also isolated from P. erosus although its precise struc­ ture could not be determined. The apparently close chemical relationship between Pachyrrhizus and Neorautanenia is discussed in the light o f a recent study which allocates these genera to differ­ ent sections o f the legum e tribe Phaseoleae. 
  Reference    Z. Naturforsch. 34c, 683 (1979); received June 5 1979 
  Published    1979 
  Keywords    Leguminosae, Pachyrrhizus, Isoflavonoids, Pterocarpans, Phytoalexins 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0683.pdf 
 Identifier    ZNC-1979-34c-0683 
 Volume    34 
6Author    JohnL. Ingham, England, PaulM. DewickRequires cookie*
 Title    Sparticarpin: A Pterocarpan Phytoalexin from Spartium junceum Reading RG 6 2 AS  
 Abstract    A new phytoalexin isolated from the fungus-inoculated leaflets o f Spartium junceum (Spanish broom) has been identified as (—)-6 aR; 11 a/?-2,3-dimethoxy-9-hydroxypterocarpan (sparticar­ pin). The total synthesis o f sparticarpin is described. 
  Reference    Z. Naturforsch. 35c, 197—200 (1980); received November 5 1979 
  Published    1980 
  Keywords    Leguminosae, Spartium, Isoflavonoids, Pterocarpan, Phytoalexins 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0197.pdf 
 Identifier    ZNC-1980-35c-0197 
 Volume    35 
7Author    JohnL. InghamRequires cookie*
 Title    Induced Isoflavonoids of Erythrina sandwicensis  
 Abstract    Two new phytoalexins isolated from the fungus-inoculated leaflets of Erythrina sandwicensis have been identified as (—)-6aS; 11 aS-3,6 a,9-trihydroxy-10-isopentenylpterocarpan (sandwicar-pin) and (—)-6a/?; 11 a^-3-hydroxy-9-methoxy-10-isopentenylpterocaipan (sandwicensin). These compounds co-occur with several known pterocarpan (demethylmedicarpin, 3,6a,9-trihydroxy-pterocarpan, phaseollidin and cristacarpin) and isoflavan (demethylvestitol and isovestitol) deriva­ tives. The preparation and spectral (UV, MS) characteristics of 3-methoxy-9-hydroxy-10-isopen-tenylpterocarpan are also described. 
  Reference    Z. Naturforsch. 35c, 384—386 (1980); received January 22 1980 
  Published    1980 
  Keywords    Leguminosae, Erythrina, Pterocarpans, Isoflavans, Phytoalexins 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0384.pdf 
 Identifier    ZNC-1980-35c-0384 
 Volume    35 
8Author    JohnL. Ingham, KennethR M ArkhamRequires cookie*
 Title      
 Abstract    After treatment with the fungus Helminthosporium car-bonum or aqueous copper sulphate, excised Lathyrus sati­ vus leaflets produce pisatin and a second isoflavonoid phy­ toalexin (lathycarpin) identified as (+)-6aÄ; 1 la/?-2,3-di-methoxy-6a-hydroxy-8,9-methylenedioxypterocarpan. 
  Reference    Z. Naturforsch. 37c, 724 (1982); received March 22 1982 
  Published    1982 
  Keywords    Leguminosae, Lathyrus, Isoflavonoids, Pterocarpans, Phytoalexins 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0724_n.pdf 
 Identifier    ZNC-1982-37c-0724_n 
 Volume    37 
9Author    MelanieJ. O 'neill, SaburiA. Adesanya, M. Argaret, F. RobertsRequires cookie*
 Title    Antifungal Phytoalexins in Phaseolus aureus Roxb  
 Abstract    Eight phytoalexins have been isolated from Phaseolus aureus (m ung bean) seedlings after treatment with aqueous CuCl2. These com pounds include three isoflavones: genistein, 2'-hydroxygenistein and a com pound tentatively identified as 2,3-dehydrokievitone, four iso-flavanones: dalbergioidin, kievitone, cyclokievitone and 5-deoxykievitone, and the pterocarpan phaseollidin. The antifungal activities against Cladosporium cucumerinum were determ ined. 
  Reference    Z. Naturforsch. 38c, 693—697 (1983); received M ay 29 1983 
  Published    1983 
  Keywords    Phaseolus aureus, Isoflavonoids, Phytoalexins, Fungitoxicity 
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 TEI-XML for    default:Reihe_C/38/ZNC-1983-38c-0693.pdf 
 Identifier    ZNC-1983-38c-0693 
 Volume    38 
10Author    JohnL. Ingham, PaulM. DewickRequires cookie*
 Title    The Structure of Desmocarpin, a Pterocarpan Phytoalexin from Desmodium gangeticum  
 Abstract    Ethyl acetate extracts o f diffusates from the fungus-inoculated leaflets o f Desm odium gangeti­ cum have been found to contain six isoflavonoid phytoalexins including the isoflavones genistein and 2'-hydroxygenistein, and the isoflavanones dalbergioidin, dip hysolone and kievitone. These known phytoalexins occur together with a new antifungal isoflavonoid (desm ocarpin) for which the structure (—)-(6a/?; 1 la/?)-l,9-dihydroxy-3-m ethoxypterocarpan is proposed. 
  Reference    Z. Naturforsch. 39c, 531 (1984); received February 27 1984 
  Published    1984 
  Keywords    Leguminosae, Papilionoideae, Desmodium, Isoflavonoids, Phytoalexins 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0531.pdf 
 Identifier    ZNC-1984-39c-0531 
 Volume    39 
11Author    J. B. Stothers, A. Stoessl, E.W B WardRequires cookie*
 Title      
 Abstract    The mechanism of the biological hydroxylation of the isopropenyl side-chain of the sesquiterpene capsidiol, to give 13-hydroxycapsidiol, has been investigated with 13C-N M R techniques, using capsidiol biogenetically enriched with 13C from [l^-^CU] acetate. The results indicate that neither an allylic rearrangement nor the formation of an epoxide intervene in the process. 
  Reference    Z. Naturforsch. 33c, 149—150 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
  Keywords    Biosynthesis, Capsidiol, 13C-NMR, Phytoalexins, Sesquiterpenes 
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 TEI-XML for    default:Reihe_C/33/ZNC-1978-33c-0149_n.pdf 
 Identifier    ZNC-1978-33c-0149_n 
 Volume    33 
12Author    Klaus-MichaelW. Eltring, W. Olfgang BarzRequires cookie*
 Title    Degradation of 3,9-Dimethoxypterocarpan and Medicarpin by Fusarium proliferatum  
 Abstract    The degradation o f 3,9-dimethoxypterocarpan was investigated in selected strains of Fusarium. Fusarium proliferatum (/'. e. Gibberella fujikuroi (SAW)WR) degrades this substrate via 3-meth-oxy-9-hydroxypterocarpan, 3,9-dihydroxypterocarpan and 2',4',7-trihydroxyisoflavan. During degradation by this organism medicarpin is first demethylated to 3,9-dihydroxypterocarpan. 
  Reference    Z. Naturforsch. 35c, 399—405 (1980); received March 10 1980 
  Published    1980 
  Keywords    Phytoalexins, 3, 9-Dimethoxypterocarpan, Medicarpin, Fusarium, Degradation, Demethylation 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0399.pdf 
 Identifier    ZNC-1980-35c-0399 
 Volume    35 
13Author    K. Enneth, R. M. Arkham, JohnL. InghamRequires cookie*
 Title    Tectorigenin, a Phytoalexin of Centrosema haitiense and Other Centrosema Species  
 Abstract    A phytoalexin isolated from the fungus-inoculated leaflets of Centrosema haitiense, C. pubescens (3 accessions) and C. virginianum has been identified as 5,7,4'-trihydroxy-6-methoxy-isoflavone (tectorigenin). This compound is variously accompanied by other isoflavones includ­ ing the previously described phytoalexin, cajanin (5,2',4'-trihydroxy-7-methoxyisoflavone). Sub­ stantial quantities of aesculetin were obtained when C. haitiense leaves were submerged for 48 h in water or fungal spore suspensions. The taxonomic position of Centrosema within the legume tribe Phaseoleae is discussed. 
  Reference    Z. Naturforsch. 35c, 919—922 (1980); received June 30 1980 
  Published    1980 
  Keywords    Centrosema, Phytoalexins, Isoflavones, Tectorigenin, Aesculetin, Chemotaxonomy 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0919.pdf 
 Identifier    ZNC-1980-35c-0919 
 Volume    35 
14Author    N. Oel, T. K. Een, L. InghamRequires cookie*
 Title    Phytoalexins from Dolichos biflorus  
 Abstract    , 2'-hydroxygenistein, dalbergioidin, kievitone and phaseollidin have been found to accumulate in leaves and stems of Dolichos biflorus (horsegram) following inoculation with the non-pathogens Pseudomonas pisi and Phytophthora megasperma f. sp. glycinea, respectively. They are accompanied by isoferreirin (5,7,4'-trihydroxy-2'-methoxyisoflavanone), a compound not previously reported as a natural product. Coumestrol and psoralidin occur constitutively in Dolichos leaves and stems. 
  Reference    Z. Naturforsch. 35c, 923—926 (1980); received June 30 1980 
  Published    1980 
  Keywords    Leguminosae, Dolichos, Isoflavonoids, Phytoalexins, Structure Elucidation Genistein 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0923.pdf 
 Identifier    ZNC-1980-35c-0923 
 Volume    35 
15Author    M. Ichael, G. H. Ahn, H. Ans, G. RisebachRequires cookie*
 Title    Cyclic AMP Is Not Involved as a Second Messenger in the Response of Soybean to Infection by Phytophthora megasperma f. sp. glycinea  
 Abstract    cAMP levels were monitored in soybean (Glycine max) infected with race 1 o f Phytophthora megasperma f. sp. glycinea and in soybean cell suspension cultures treated with a glucan elicitor from P. megasperma. While cAMP could be readily detected in soybean hypocotyls using a rad io ­ immunoassay, no correlation was observed between infection and cAMP levels. N o cAMP was detected in suspension cultured soybean cells. These results suggest that cAMP does not play a significant role in the plant's response to fungal attack, or the response o f suspension cultured cells to elicitor. 
  Reference    Z. Naturforsch. 38c, 578 (1983); received April 12 1983 
  Published    1983 
  Keywords    Cyclic AMP, Radioimmunoassay, Phytoalexins, Glycine max, Phytophthora megasperma 
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 TEI-XML for    default:Reihe_C/38/ZNC-1983-38c-0578.pdf 
 Identifier    ZNC-1983-38c-0578 
 Volume    38 
16Author    Joachim Leube, Hans GrisebachRequires cookie*
 Title    Further Studies on Induction of Enzymes of Phytoalexin Synthesis in Soybean and Cultured Soybean Cells  
 Abstract    The glucan elicitor from cell walls o f the fungal pathogen, Phytophthora m egasperm a f. sp. glycinea, caused a decrease in activity o f 3-hydroxy-3-m ethylglutaryl coenzym e A reductase in wounded soybean cotyledons, whereas wounding alone led to an increase in the activity o f this enzyme. A decrease o f HM G -CoA reductase activity after elicitor treatment was also found in soybean hypocotyls and soybean cell cultures. In contrast to the activity o f H M G -CoA reductase, the activity o f dim ethylallylpyrophosphate: 3,6a,9-trihydroxypterocarpan dimethylallyltransferase increases after elicitor challenge o f soy­ bean cell cultures and after inoculation o f soybean hypocotyls (cv A m so y 7 1) with m ycelium o f either race 1 (incom patible) or race 3 (com patible) o f P. megasperma. 
  Reference    Z. Naturforsch. 38c, 730 (1983); received June 23 1983 
  Published    1983 
  Keywords    Phytoalexins, Soybean, Soybean Cell Cultures, Enzyme-Induction 
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 TEI-XML for    default:Reihe_C/38/ZNC-1983-38c-0730.pdf 
 Identifier    ZNC-1983-38c-0730 
 Volume    38 
17Author    SaburiA. Adesanya, M. Elanie, '. N. Eill, M. A. Rg, Re, F. R.Requires cookie*
 Title    Induced and Constitutive Isoflavonoids in Phaseolus mungo L. Leguminosae  
 Abstract    Sixteen isoflavonoids have been isolated from the black gram, Phaseolus mungo L. (syn. Vigna mungo) following treatment with aqueous CuCl2. These include 12 known isoflavonoids: genistein, 2'-hydroxygenistein, 2'-hydroxydaidzein, kievitone, dalbergioidin, cyclokievitone, 5-deoxykievitone, 2'-hydroxydihydrodaidzein, isoferreirin, aureol, glycinol and demethylvestitol. In addition, kievitone hydrate, which was previously known only as a fungal metabolite of kievitone, was isolated together with 3 novel natural isoflavanones which were characterized as 4'-0-methylkievitone, cyclokievitone hydrate and 5-deoxykievitone hydrate. 
  Reference    Z. Naturforsch. 39c, 888—893 (1984); received June 12 1984 
  Published    1984 
  Keywords    Phaseolus mungo, Vigna mungo, Isoflavonoids, Phytoalexins 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0888.pdf 
 Identifier    ZNC-1984-39c-0888 
 Volume    39 
18Author    JohnL. Ingham, Satoshi TaharaRequires cookie*
 Title    Isoneorautenol and Other Pterocarpan Phytoalexins from Calopogonium mucunoides  
 Abstract    Following inoculation with the fungus H elm inthosporium carbonum , excised leaflets o f the tropical papilionate legum e C alopogonium m ucunoides have been found to produce isoneorautenol, a new dim ethylpyrano-substituted isoflavonoid (pterocarpan) phytoalexin. This com pound accumulates together with dem ethylm edicarpin, neodu nol, tuberosin, sophorap-terocarpan A , and a sixth highly antifungal isoflavonoid (calopocarpin) characterised as 3,9-dihydroxy-2-(3,3-dim ethylallyl)pterocarpan. Chrom atographic and spectroscopic exam ination of 'hom oedudiol' (a pterocarpan from N eorautanenia edulis roots previously considered to possess the structure now assigned to calopocarpin) has shown that in reality this substance is identical with sophorapterocarpan A . The system atic relationship o f C alopogonium to other genera within the legum e tribe P haseoleae is briefly discussed. 
  Reference    Z. Naturforsch. 40c, 482—489 (1985); received March 16 1985 
  Published    1985 
  Keywords    Legum inosae, Calopogonium, Isoflavonoids, ( —) —Pterocarpans, Phytoalexins 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0482.pdf 
 Identifier    ZNC-1985-40c-0482 
 Volume    40 
19Author    Susanne Daniel, Walter Hinderer, Wolfgang BarzRequires cookie*
 Title    Elicitor-induced Changes of Enzyme Activities Related to Isoflavone and Pterocarpan Accumulation in Chickpea (Cicer arietinum L.) Cell Suspension Cultures  
 Abstract    The extractable activities of thirteen enzymes of primary and secondary metabolism have been measured in chickpea (Cicer arietinum L.) cell suspension cultures after treatment with an elicitor from the fungus Ascochyta rabiei (Pass.) Lab. The cell culture, derived from the A. rabiei resistant cultivar ILC 3279, constitutively accumulated the isoflavones biochanin A and formononetin together with their 7-O-glucosides and the 7-0-glucoside-6"-malonates. After elicitor application the cells rapidly form the pterocarpan phytoalexins medicarpin and maackiain. Among the enzymes of primary metabolism only the glucose 6-phosphate dehydrogenase exhibited a significant increase in activity with a maximum four hours after application of the elicitor. In phenylpropane metabolism the activities of phenylalanine ammonia lyase and chalcone synthase were enhanced by the elicitor and exhibited highest levels after four hours. In contrast the chalcone isomerase activity was not influenced by the elicitor. A substantial enhancement occurred with the isoflavone 7-O-glucosyltransferase activity eight hours after elicitor application. The results suggest that in this cell culture the elicitor-induced biosynthesis of pterocarpan phytoalexins was accompanied with a rapid and transient increase of those enzyme activities which are located at branching points of related pathways, i.e. pentose phosphate cycle, general phenylpropane metabolism, flavonoid formation and isoflavone conjugation. 
  Reference    Z. Naturforsch. 43c, 536—544 (1988); received April 8 1988 
  Published    1988 
  Keywords    Cicer arietinum, Isoflavones, Pterocarpans, Phytoalexins, Elicitor 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0536.pdf 
 Identifier    ZNC-1988-43c-0536 
 Volume    43 
20Author    AndreasB. Wolff, Maung Thynn, Elisabeth Gorge, Dietrich WernerRequires cookie*
 Title    Wyerol and Wyerone Accumulation in Tissue Cultures of Vicia faba  
 Abstract    Callus cultures of various cultivars of Vicia faba were studied for regeneration. During callus growth on agar or in liquid medium a black tissue was often observed correlated with an autolysis of some cells. With those tissues callus growth and regeneration of plants was inhibited. In black callus the phytoalexin synthesis is induced without infection by microorganism. The main phyto-alexins in the callus tissue are wyerol and wyerone, with some wyeronic acid and dihydrowyerone. Wyerol was found especially in the cultivar Troy at a high concentration. In four cultivars the pooled phytoalexin concentration varied between 10 and 150 pg-g _1 fresh weight. 
  Reference    Z. Naturforsch. 43c, 636—640 (1988); received March 7/May 30 1988 
  Published    1988 
  Keywords    Vicia faba, Callus and Liquid Cultures, Regeneration, Phytoalexins 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0636.pdf 
 Identifier    ZNC-1988-43c-0636 
 Volume    43 
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