Showing papers on "Glucoside published in 1985"
TL;DR: The effects of various stilbenes (i.e., 3,4,5-trihydroxystilbene, 3, 4,5,trihydroxylstilbinene 3-O-d -glucoside and 2,3,4',5-tetrahydroxystielbene 2-O-, d-glucose) isolated from the roots of Polygonum species on rat peritoneal polymorphonuclear leukocyte lipoxygenase and cycloencogenase activities were studied in this paper
275 citations
TL;DR: In this paper, the major metabolite (I) was identified as a homoglutathione conjugate, 4-amino-6- tert -butyl-3- S -(γ-glutamyl-cysteinyl-β-alanine)-1,2,4-triazin-5(4H)-one.
71 citations
TL;DR: A new flavonol glycoside, quercetin 3- O -galactosyl-(1 → 6)-glucoside, has been isolated from above-ground parts of narrowleaf vetch, Vicia angustifolia and its antibacterial activity against Pseudomonas maltophilia and Enterobacter cloacae is compared.
57 citations
48 citations
TL;DR: In this article, it was shown that o-coumaric acid glucoside is synthesized in the cytoplasm and thereafter transferred into the vacuole and no further degradation occurs in the isolated protoplasts after this transfer.
44 citations
TL;DR: In this paper, the metabolism of N 6 -(Δ 2 -isopentenyl) adenine, dihydrozeatin, zeatin- O -glucoside and dihydrogen hydroxide was studied using derooted radish seedlings.
42 citations
TL;DR: Methanolic extracts from aerial parts and capsules of plants of 5 populations of Blackstonia perfoliata and 99 populations ofCentaurium species (Gentianaceae) have been screened by means of TLC for the secoiridoid glucosides and the m-hydroxybenzoyl esters of sweroside.
Abstract: Methanolic extracts from aerial parts and capsules of plants of 5 populations ofBlackstonia perfoliata and 99 populations of nine European and two AmericanCentaurium species (Gentianaceae) have been screened by means of TLC for the secoiridoid glucosides: sweroside, swertiamarin, gentiopicroside and the m-hydroxybenzoyl esters of sweroside, namely centapicrin, desacetylcentapicrin, decentapicrin A and B as well as for the xanthones: 1,8-dihydroxy-3,5-dimethoxyxanthone, 1,8-dihydroxy-3,7-dimethoxyxanthone, 1,8-dihydroxy-3,5,6,7-tetramethoxyxanthone and xanthone-β-mono-glucosides. The taxonomical significance of the results is discussed. On the basis of chemotaxonomical evidence twoCentaurium species,C. pulchellum andC. tenuiflorum, are placed in sect.Parviflora instead of sect.Centaurium subsect.Parviflora.
39 citations
TL;DR: A new metabolite of the plant growth substance indole-3-acetic acid has been extracted from Zea mays seedlings and characterized as the 7'-O-beta-D-glucopyranoside of 7-hydroxy-2-oxindole- 3-ACetic acid.
37 citations
TL;DR: Along with the flavonoid glucoside, rutin, three new secoiridoid glucoses, 9″-hydroxyjasmesoside and 9″hydroxy jasminin 10″- O -β-d -glucoside have been isolated from the leaves of Jasminum mesnyi, and their structures have been elucidated as discussed by the authors.
28 citations
TL;DR: In addition to the four sesquiterpene lactones previously identified, a new acylated γ-butyrolactone glucoside, taraxacoside was isolated from the roots of Taraxacum officinale as discussed by the authors.
25 citations
TL;DR: A new lignan characterised as (-)-4-hydroxy-2,6-di-(4′-hydrox-3′-methoxy)phenyl-3,7-dioxabicyclo-(330)octane along with n -10-nonacosanol, scopoletin, syringic acid, β-sitosterol and its glucoside, has been isolated from the aerial parts of Lonicera hypoleuca as mentioned in this paper.
TL;DR: In this article, two iridoid glycosides have been isolated from Viburnum betulifolium, and the structure and absolute configuration of viburnalloside have been established by spectroscopic means, and those of decapetaloside by chemical correlation with adoxoside.
TL;DR: P Pulse labelling experiments and studies with a molecular inhibitor of phenylalanine ammonia lyase showed that in roots of Cicer arietinum formononetin 7- O -glucoside-6″-O -malonate is rapidly metabolized whereas biochanin A appears to be metabolically rather inert.
TL;DR: From Parentucellia viscosa, a new glucosidic iridoid, gardoside methyl ester, was isolated along with bartioside, aucubin, melampyroside, shanzhiside, and 8-epiloganin this paper.
TL;DR: The structure of senburiside I, a new iridoid glucoside isolated from SWERTIA JAPONICA, was elucidated to be 7-epi-( M-hydroxybenzoyl)-2'-sinapoyl-loganic acid.
Abstract: The structure of senburiside I, a new iridoid glucoside isolated from SWERTIA JAPONICA, was elucidated to be 7-epi-( M-hydroxybenzoyl)-2′-sinapoyl-loganic acid.
TL;DR: The results from the analysis for its occurrence in double mutants, suggest that xanthurenic acid 8-glucoside formation is closely related to the regulation of the last step in the biosynthesis of xanthommatin.
TL;DR: Extraction, purification and analysis of the anthocyanin pigments of ten taxa of the genus Centaurea yielded cyanidin 3-O -(6- O -succinyl-β-D -glucoside)-5- O −β- D −glucose as discussed by the authors.
TL;DR: Sedimentation equilibrium experiments confirmed that band 3 in octyl glucoside exists in a heterogeneous and high oligomeric state.
Abstract: Band 3 protein, the anion transport protein of the human erythrocyte membrane, was purified in the presence of the nonionic detergent octyl glucoside. A molecular characterization was carried out to investigate whether the native structure of the protein was retained in the presence of this detergent. Band 3 bound octyl glucoside below the critical micelle concentration (cmc) of the detergent, approaching saturation above the cmc. At 40 mM octyl glucoside, close to saturating concentrations, 0.64 g of octyl glucoside is bound per gram of band 3 protein, corresponding to 208 molecules of detergent bound per monomer of band 3. Sedimentation velocity and gel filtration studies, performed at 40 mM octyl glucoside, indicated that the band 3-octyl glucoside complex had an average molecular weight of 1.98 X 10(6), which corresponds to a dodecamer. Sedimentation equilibrium experiments confirmed that band 3 in octyl glucoside exists in a heterogeneous and high oligomeric state. This high oligomeric state did not change dramatically over octyl glucoside concentrations ranging from 6 to 60 mM. The circular dichroism spectrum of band 3 changed only slightly over this range of octyl glucoside concentrations. The alpha-helical and beta-sheet contents of band 3 in 2 mM octyl glucoside were calculated to be 40% and 27%, respectively, indicating that no gross alteration in the secondary structure of the protein had occurred in octyl glucoside. The ability of band 3 to bind 4-benzamido-4'-aminostilbene-2,2'-disulfonate (BADS), a potent inhibitor (Ki = 1 microM) of anion transport, was measured to assess the integrity of the inhibitor binding site of the protein in octyl glucoside.(ABSTRACT TRUNCATED AT 250 WORDS)
01 Jan 1985
TL;DR: A selective permeability of the tonoplast to the two isomers which could be involved, in vivo, in the trapping of the glucoside inside the vacuole and its irreversible accumulation is suggested.
Abstract: Abstract Sweet clover leaves accumulate o-coumaric acid glucoside in the vacuole of the mesophyll cells. Protoplasts isolated from these cells are able to synthesize o-coumaric acid glucoside from exogeneous [14C]phenylalanine. Using this simplified system, kinetic analyses have shown that the glucoside is synthesized in the cytoplasm and thereafter transferred into the vacuole. No further degradation of the glucoside occurs in the isolated protoplasts after this transfer. Under our conditions, the vacuolar pH is reduced by light/dark transition and by inhibitors of photosynthesis. These treatments also depressed synthesis and transport of o-coumaric acid glucoside. The data support a relationship between the functioning of photosynthesis and pH cytoplasm/vacuole-dependent transport of o-coumaric acid glucoside into the vacuole. However as o-[ 14 C ] coumaric acid glucoside is taken up by isolated vacuoles without any energy requirement, no final conclusions can be drawn as to the coupling of o-coumaric acid glucoside transport with the acidification process. In intact plant or isolated protoplasts o-coumaric acid glucoside is synthesized as the trans isomer but accumulated in the vacuole in the cis form. When loaded with trans o-[ 14 C ] coumaric acid glucoside, reconstituted tonoplastic vesicles released this compound during molecular sieving on a Sepharose 4B column. In contrast, the labelled cis form was completely retained inside the vesicular lumen in a parallel experiment. These results suggest a selective permeability of the tonoplast to the two isomers which could be involved, in vivo, in the trapping of the glucoside inside the vacuole and its irreversible accumulation.
TL;DR: A new iridoid glucoside, campsiside, was isolated along with 5-hydroxycampsiside (pond-raneoside) and an alkaloid, boschniakine, from Campsis chinensis.
Abstract: A new iridoid glucoside, campsiside, was isolated along with 5-hydroxycampsiside (pond-raneoside) and an alkaloid, boschniakine, from Campsis chinensis. The structures of campsiside and 5-hydroxycampsiside (pondraneoside) were established as 5 and 12, respectively, from chemical and spectral evidence.
TL;DR: In this article, a variety of flavone glucosides and their 6-inch malonyl esters were isolated from Bryum capillare Hedw in a non vascular plant.
Abstract: Abstract From Bryum capillare Hedw. a variety of flavone glucosides and their 6″ malonyl esters were isolated. Diosmetin 7-O-β-D-glucoside-6″-malonylester, luteolin 7-O-β-D-glucoside-6″-malonyl-ester and 6-OH-luteolin 7-O-β-D-glucoside-6″-malonylester are new flavone malonyl esters. This is the first report of flavone glucoside malonylesters in a non vascular plant. The flavonoid pattern of the gametophyte is different from that of the sporophyte. The chemotaxonomic relevance of these results is discussed.
TL;DR: It is concluded that the major changes in the enzymatic activities occur as a consequence of the sterol acceptors and acyl donor content during potato tuber growth.
TL;DR: From the ethanolic extract of the pods of CASSIA OCCIDENTALIS, two flavonoid glycosides namely 3,5,3',4'-tetrahydroxy-7-methoxyflavone 3- O-(2''-rhamnosyl glucoside) and 5,7,4'-trihydroxy-3,6,3'-trimethoxy-flav one 7- O-[2''.
Abstract: From the ethanolic extract of the pods of CASSIA OCCIDENTALIS, two flavonoid glycosides namely 3,5,3',4'-tetrahydroxy-7-methoxyflavone 3- O-(2''-rhamnosyl glucoside) and 5,7,4'-trihydroxy-3,6,3'-trimethoxy-flavone 7- O-(2''-rhamnosyl glucoside) have been isolated and their structures characterised. Both these aglycones (1, 2) are known but their glycosides are being reported for the first time.
TL;DR: The enzyme involved in steryl glucoside formation was solubilized by treatment of the envelope membranes with 0-3% Triton X-100, and had an almost absolute requirement for sterol acceptors.
Abstract: Envelope membranes were isolated from potato tuber amyloplast by a discontinuous sucrose density gradient and high speed centrifugation. These membranes catalyzed the transfer of [14C]glucose from UDP-[14C]glucose to endogenous sterol acceptors and, in turn, catalyzed the esterification of steryl glucosides with fatty acids from an endogenous acyl donor. The synthesis of steryl glucosides was stimulated in the presence of Triton X-100, while formation of acyl steryl glucosides was inhibited by the detergent. However, in the presence of an added sterol acceptor and Triton X-100, the inhibition of acyl steryl glucoside synthesis was overcome by the addition of phosphatidylethanolamine. The enzyme involved in steryl glucoside formation was solubilized by treatment of the envelope membranes with 0-3% Triton X-100. The solubilized enzyme had an almost absolute requirement for sterol acceptors.
TL;DR: In this paper, two new compounds isolated from the rhizomes of Panax pseudo-ginseng have been characterized as 14-hydroxyheneicosanoic acid and dotriacontanyl palmitate, respectively.
Journal Article•
TL;DR: A new naturally occurring hypolaetin 8-β- D -glucoside has been isolated and identified from Sideritis leucantha and suffered nuclear methylation during derivatization.