Phytoalexins from Brassicaceae: news from the front.

abstract：:A phytochemical investigation of the roots of Symplocos caudata Wall (Symplocaceae) resulted in isolation and characterization of four optical isomers of a neolignan glycoside (1-4), a lignan lactone glycoside (5), a phenylpropanoid glycoside (6), as well as two known compounds (7, 8). Their structures were elucidated...

journal_title：Phytochemistry

authors： Huo C,Liang H,Zhao Y,Wang B,Zhang Q

更新日期：2008-02-01 00:00:00

abstract：:Six undescribed triterpenoids, schincarins A‒F, categorized as the preschisanartane (schincarin A), 3,4-secocycloartane (schincarins B‒D), 3,4; 9,10-disecocycloartane (schincarin E), and 3,4-secolanostane (schincarin F) classes, along with twelve known analogues, were obtained from the stems and leaves of Schisandra i...

journal_title：Phytochemistry

authors： Zhou M,Peng X,Zhou J,Liu Y,Meng X,Ruan H

更新日期：2020-09-01 00:00:00

abstract：:Four new xanthones have been isolated from the roots of Hypericum roeperanum. Their structures have been established by a combination of spectroscopic and chemical methods as 1,6-dihydroxy-5-methoxy-4',5'-dihydro-4',4',5'-trimethylfurano- (2',3':3,4)-xanthone (5-O-methyl-2-deprenylrheediaxanthone B), 1,6-dihydroxy-5-m...

journal_title：Phytochemistry

authors： Rath G,Potterat O,Mavi S,Hostettmann K

更新日期：1996-09-01 00:00:00

abstract：:Schizolobium parahyba seed chymotrypsin inhibitor (SPC) is a protein with M(r) of 20,000 and four half-cystine residues and no free thiol group. SPC is stable at temperatures up to 75 degrees at pH 7 but gradually loses activity when kept at 95 degrees for 1 hr and total inactivation occurs after 5 hr. Amino acid anal...

journal_title：Phytochemistry

authors： Souza EM,Mizuta K,Sampaio MU,Sampaio CA

更新日期：1995-06-01 00:00:00

abstract：:Bioassay-directed fractionation of an ethyl acetate extract from cultures of the fungus Malbranchea aurantiaca led to the isolation of two phytotoxic compounds, namely, 1-hydroxy-2-oxoeremophil-1(10),7(11),8(9)-trien-12(8)-olide (1) and penicillic acid (2). The structure of 1 was established by spectroscopic and X-ray...

journal_title：Phytochemistry

authors： Martínez-Luis S,González MC,Ulloa M,Mata R

更新日期：2005-05-01 00:00:00

abstract：:The twigs of Dorstenia prorepens furnished the digeranylated chalcone, 5,3'-(3,7-dimethyl-2,6-octadienyl)-3,4, 2',4'-tetrahydroxychalcone while Dorstenia zenkeri yielded the 3',4'-(3-hydroxy-2,2-dimethyldihydropyrano)-4,2'-dihydroxychalcone and a bichalcone. 4-Hydroxylonchocarpin was found in both plants. D. prorepens...

journal_title：Phytochemistry

authors： Abegaz BM,Ngadjui BT,Dongo E,Ngameni B,Nindi MN,Bezabih M

更新日期：2002-04-01 00:00:00

abstract：:The CHCl(3) extract of the bark of Garcinia speciosa contained four 17,14-friedolanostanes and five lanostanes as well as friedelin and common plant constituents. The friedolanostanes were the previously known methyl ester of (24E)-3 alpha,23 alpha-dihydroxy-17,14-friedolanostan-8,14,24-trien-26-oic acid and the methy...

journal_title：Phytochemistry

authors： Vieira LM,Kijjoa A,Silva AM,Mondranondra IO,Kengthong S,Gales L,Damas AM,Herz W

更新日期：2004-02-01 00:00:00

abstract：:Chemical investigations of a microfungus Xylaria sp. isolated from the Australian rainforest tree Glochidion ferdinandi have afforded two new natural products, 2-hydroxy-6-methyl-8-methoxy-9-oxo-9H-xanthene-1-carboxylic acid (1) and 2-hydroxy-6-hydroxymethyl-8-methoxy-9-oxo-9H-xanthene-1-carboxylic acid (2). Compound ...

journal_title：Phytochemistry

authors： Healy PC,Hocking A,Tran-Dinh N,Pitt JI,Shivas RG,Mitchell JK,Kotiw M,Davis RA

更新日期：2004-08-01 00:00:00

abstract：:Novel, polyunsaturated monocyclic sester- and triterpenes isolated from the diatom Rhizosolenia setigera (Brightwell), are biosynthesised mainly via the mevalonate pathway. The experiments involved incubation of the alga with [1-(13)C]acetate, isolation of the alkenes by extraction and silver ion HPLC, followed by det...

journal_title：Phytochemistry

authors： Massé G,Belt ST,Rowland SJ

更新日期：2004-04-01 00:00:00

abstract：:The phytohormones, auxin and ethylene, together control a wide range of physiological and developmental processes in plants. The lack of knowledge regarding how the underlying signaling processes are reflected at the protein level represents a major gap in understanding phytohormone signaling, including that mediated ...

journal_title：Phytochemistry

authors： Slade WO,Ray WK,Williams PM,Winkel BS,Helm RF

更新日期：2012-12-01 00:00:00

abstract：:Tetraoxygenated xanthones, cowaxanthones A-E, together with 10 previously reported tetraoxygenated xanthones, were isolated from the crude hexane extract of the fruits of Garcinia cowa. Cowaxanthone B has previously been reported as a synthetic xanthone. Their structures were elucidated by analysis of spectroscopic da...

journal_title：Phytochemistry

authors： Panthong K,Pongcharoen W,Phongpaichit S,Taylor WC

更新日期：2006-05-01 00:00:00

abstract：:C6-aldehydes, such as (Z)-3-hexenal, (E)-2-hexenal, and n-hexanal, are volatile compounds formed by hydroperoxide lyase (HPL) and found in most terrestrial plants. They are fungicidal and bactericidal compounds, and are also signaling compounds to induce defense responses in plants. Transgenic plants having overexpres...

journal_title：Phytochemistry

authors： Kishimoto K,Matsui K,Ozawa R,Takabayashi J

更新日期：2008-08-01 00:00:00

abstract：:Injury to plant products by harvest and postharvest operations induces respiration rate and increases the demand for respiratory substrates. Alterations in primary carbon metabolism are likely to support the elevated demand for respiratory substrates, although the nature of these alterations is unknown. To gain insigh...

journal_title：Phytochemistry

authors： Lafta AM,Fugate KK

更新日期：2011-04-01 00:00:00

abstract：:Erucastrum canariense Webb & Berthel. (Brassicaceae) is a wild crucifer that grows in rocky soils, in salt and water stressed habitats, namely in the Canary Islands and similar environments. Abiotic stress induced by copper chloride triggered formation of a phytoalexin and galacto-oxylipins in E. canariense, whereas w...

journal_title：Phytochemistry

authors： Pedras MSC,To QH

更新日期：2017-07-01 00:00:00

abstract：:A truncated history of the contribution of plants to medicine is given with reference to some of the less well known ancestors of the Harborne family. Six of the top 20 prescriptions dispensed in 1996 were natural products and the clinical use of drugs such as artemisinin, etoposide and taxol has once more focussed at...

journal_title：Phytochemistry

authors： Phillipson JD

更新日期：2001-02-01 00:00:00

abstract：:The influence of solar irradiance and seasons on prostaglandin (PG) and arachidonic acid (AA) content in the marine red alga Gracilaria verrucosa (Huds.) Papenf. (unattached form) was investigated. PGA(2), PGE(2), PGF(2), and 15-keto-PGE(2) were isolated from the alga, quantitatively analyzed as 4-methyl-7-methoxycoum...

journal_title：Phytochemistry

authors： Imbs AB,Vologodskaya AV,Nevshupova NV,Khotimchenko SV,Titlyanov EA

更新日期：2001-12-01 00:00:00

abstract：:The distribution and biosynthesis of iridoid glucosides in the Oleaceae is reviewed and five distinct biosynthetic pathways to iridoids have been identified in the family, deoxyloganic acid apparently being a common intermediate. Likewise, the distributions of caffeoyl phenylethanoid glycosides (CPGs), i.e. verbascosi...

journal_title：Phytochemistry

authors： Jensen SR,Franzyk H,Wallander E

更新日期：2002-06-01 00:00:00

abstract：:Scrokoelziside A, isolated from the aerial parts of Scrophularia koelzii was shown to be 3-O-([alpha-L-rhamnopyranosyl-(1-->3), beta-D-glucopyranosyl-(1-->2)]-beta-D-fucopyranosyl-(1-->4)-beta-D- glucopyranosyl]-13 beta,28-epoxyolean-11-en-23-ol, on the basis one- and two-dimensional NMR homo- and hetero-nuclear spect...

journal_title：Phytochemistry

authors： Bhandari SP,Roy R,Agrawal PK,Garg HS

更新日期：1996-02-01 00:00:00

abstract：:Anti-inflammatory activity guided fractionation of the n-hexane soluble fraction of a 70% aqueous methanolic extract of the dried fruits of Forsythia suspensa afforded two new triterpenes. The structures of these compounds were elucidated as 3beta-acetyl-20,25-epoxydammarane-24alpha-ol (1) and 3beta-acetyl-20,25-epoxy...

journal_title：Phytochemistry

authors： Rouf AS,Ozaki Y,Rashid MA,Rui J

更新日期：2001-04-01 00:00:00

abstract：:The control and interaction between nitrogen and carbon assimilatory pathways is essential in both photosynthetic and non-photosynthetic tissue in order to support metabolic processes without compromising growth. Physiological differences between the basal and mature region of wheat (Triticum aestivum) primary leaves ...

journal_title：Phytochemistry

authors： Allwood JW,Chandra S,Xu Y,Dunn WB,Correa E,Hopkins L,Goodacre R,Tobin AK,Bowsher CG

更新日期：2015-07-01 00:00:00

abstract：:Camalexin (3-thiazol-2'-yl-indole) is the characteristic phytoalexin of Arabidopsis thaliana, which is induced by a great variety of plant pathogens. While particular pathogens, as well as a human tumour cell line, were growth inhibited by camalexin, some fungi show resistance due to active degradation. Camalexin orig...

journal_title：Phytochemistry

authors： Glawischnig E

更新日期：2007-02-01 00:00:00

abstract：:Three previously undescribed compounds, maneonenes and isomaneonene derivatives; in addition to five known compounds, two cuparene, one chamigrene, and two cis-maneonenes were isolated from the Red Sea red alga Laurencia obtusa. The chemical structures of all unknown metabolites were characterized employing spectrosco...

journal_title：Phytochemistry

authors： Bawakid NO,Alarif WM,Ismail AI,El-Hefnawy ME,Al-Footy KO,Al-Lihaibi SS

更新日期：2017-11-01 00:00:00

abstract：:Small molecules (xenobiotics) that inhibit cell-wall-localised enzymes are valuable for elucidating the enzymes' biological roles. We applied a high-throughput fluorescent dot-blot screen to search for inhibitors of Petroselinum xyloglucan endotransglucosylase (XET) activity in vitro. Of 4216 xenobiotics tested, with ...

journal_title：Phytochemistry

authors： Chormova D,Franková L,Defries A,Cutler SR,Fry SC

更新日期：2015-09-01 00:00:00

abstract：:An activity-guided separation for inhibitors of rat platelet 12-lipoxygenase led to the isolation of two compounds, 4-O-feruloyl-5-O-caffeoylquinic acid (IC50; 5.5 microM) and methyl 4-O-feruloyl-5-O-caffeoylquinate (IC50; 1.9 microM) from the peel of Ponkan fruit (Citrus reticulata). The complete structure of each ph...

journal_title：Phytochemistry

authors： Nogata Y,Sekiya K,Ohta H,Kusumoto K,Ishizu T

更新日期：2001-04-01 00:00:00

abstract：:Cell adhesion occurs primarily at the level of middle lamella which is mainly composed by pectin polysaccharides. These can be degraded by cell wall degrading enzymes (CWDEs) during developmental processes to allow a controlled separation of plant cells. Extensive cell wall degradation by CWDEs with consequent cell se...

journal_title：Phytochemistry

authors： Lionetti V,Cervone F,De Lorenzo G

更新日期：2015-04-01 00:00:00

abstract：:The flavonoid rich grain of buckwheat (Fagopyrum esculentum Moench, Fam. Polygonaceae) is of high nutritional value. With the aim to improve its agronomic productivity, cultivars were crossed with the wild species F. homotropicum which, however, differs in its flavonoid content. The intention of this work was to deter...

journal_title：Phytochemistry

authors： Olschläger C,Regos I,Zeller FJ,Treutter D

更新日期：2008-04-01 00:00:00

abstract：:An extract of leaves and stems of Peperomia villipetiola has been found to contain myristicin (3-methoxy-4,5-methylenedioxy-allylbenzene) and seven chromenes, whose structures are methyl 5-hydroxy-7-methyl-2,2-dimethyl-2H-1-chromene-6-carboxylate (1), methyl 5-methoxy-7-methyl-2,2-dimethyl-2H-1-chromene-8-carboxylate ...

journal_title：Phytochemistry

authors： Malquichagua Salazar KJ,Delgado Paredes GE,Lluncor LR,Young MC,Kato MJ

更新日期：2005-03-01 00:00:00

abstract：:Three undescribed dammarane-type saponins, russelliinosides A-C, together with a common sterol (β-sitosterol), an abietane diterpenoid (18-hydroxyferruginol), two oleane triterpenoids (daturaolone and oleanolic acid), an ursane triterpenoid (ursolic acid) as well as three 5-hydroxyflavones (cirsimaritin, eupatorin, an...

journal_title：Phytochemistry

authors： Hafez Ghoran S,Firuzi O,Asadollahi M,Stuppner H,Alilou M,Jassbi AR

更新日期：2021-01-29 00:00:00

abstract：:Acid hydrolysis of cell wall-rich material from thalli of the hornwort Anthoceros caucasicus yielded substantial amounts of an unusual disaccharide (1). Hydrolysis of 1 yielded only GlcA, Gal and unhydrolysed 1. Compound 1 was identified as alpha-D-GlcpA-(1-->3)-L-Gal by 1H and 13C NMR spectroscopic analysis and by th...

journal_title：Phytochemistry

authors： Popper ZA,Sadler IH,Fry SC

更新日期：2003-09-01 00:00:00

abstract：:In a study of 62 plant species of the Cretan flora for their phytotoxic activity, plants were extracted successively with CH2Cl2, MeOH and H2O. Phytotoxicity evaluation of the 240 extracts was performed against Lactuca sativa L. and Agrostis stolonifera L.. The MeOH extract of Bellis longifolia was the most phytotoxic...

journal_title：Phytochemistry

authors： Stavropoulou MI,Angelis A,Aligiannis N,Kalpoutzakis E,Mitakou S,Duke SO,Fokialakis N

更新日期：2017-12-01 00:00:00