共查询到20条相似文献,搜索用时 15 毫秒
1.
M.G. Pimenov Yu.E. Sklyar A.A. Savina Yu.V. Baranova 《Biochemical Systematics and Ecology》1982,10(2):133-138
Ferula species of the section Palaeonarthex contains various sesquiterpenoids. While C-15 terpenoid coumarins of the iresan type are the most characteristic constituents of species in the subsection Foetidissimae, sesquiterpene lactones and C-10 terpenoid coumarns are found in the subsection Tumidae and esters of the sesquiterpene alcohols in the subsection Jaeschkaenae. The biogenetic relationships of the Ferula sesquiterpenoids and their chemosystematic value are discussed. 相似文献
2.
Yoshinori Asakawa Masao Toyota Tsunematsu Takemoto Claude Suire 《Phytochemistry》1979,18(6):1007-1009
The characteristic pungency of the European liverwort, Chiloscyphus polyanthus, is due to a mixture of four sesquiterpene lactones, two new structures ent-5β-hydroxydiplophyllin and ent-3-oxodiplophyllin, and the previously known diplophyllin and diplophyllolide. A new dihydrodiplophyllin, together with the pungent diplophyllolide and diplophyllin, has been isolated from Diplophyllum albicans. Ent-dihydrodiplophyllolides derived from the above pungent diplophyllolides produce intense numbness of the tongue. All pungent sesquiterpene lactones showed inhibitory activity towards the germination and root elongation of rice husks. 相似文献
3.
The allelopathic effects of the two sesquiterpene lactones, costunolide and parthenolide, isolated from the leaves of Magnolia grandiflora L. were evaluated on the wheat (Triticum aestivum L.), lettuce (Lactuca sativa L.), radish (Raphanus sativus L.) and onion (Allium cepa L.). Seed germination of the test species was significantly reduced at 500 μg/ml by both compounds. Both sesquiterpenes showed pronounced inhibition of root length of the test species and the inhibitory effect was concentration-dependent. In addition, shoot growth of the four species was significantly inhibited at all the concentrations tested (10–500 μg/ml). Parthenolide reduced germination and inhibited seedling growth more than costunolide. Inhibition of root growth was generally greater than that of shoot growth. The results encourage the use of these sesquiterpenes as models for development of new herbicides. 相似文献
4.
Alex Beharav Roi Ben-David Janusz Malarz Anna Stojakowska Klaudia Michalska Ivana Doležalová Aleš Lebeda Wanda Kisiel 《Biochemical Systematics and Ecology》2010
A comparative phytochemical study of seven sesquiterpene lactones in natural populations of the wild lettuce Lactuca aculeata Boiss. (Asteraceae) was performed, based on 23 accessions derived from eight, two, and single localities from Israel, Jordan, and Turkey, respectively. The compounds were profiled and quantified in leaves and roots of the plants, grown from achenes (cypselas) in a greenhouse under controlled conditions, using reverse phase HPLC with on-line photodiode array detector. In the present study, L. aculeata was confirmed as a taxon strongly characterized by four dominant sesquiterpene lactones: 8-deoxylactucin, jacquinelin, crepidiaside B and lactuside A. An analysis of quantitative results of these four constituents led to the following conclusions: (i) the sesquiterpene lactone contents varied significantly, mainly within the populations; however, for two variables (crepidiaside B and lactuside A in root samples) the contents varied mostly between populations, (ii) these differences are likely to be genetically controlled since all accessions were grown under standardized glasshouse conditions. Accessions containing high levels of some sesquiterpene lactones were found in several populations. These traits should be conserved in situ and ex situ and utilized in further research and lettuce improvement. 相似文献
5.
The chloroform extract from the leaves of Eupatorium quadrangularae has been systematically fractionated by following biological activity in a bioassay which measures repellency to the leafcutter ant Atta cephalotes (Formicidae, Attini). Several sesquiterpene lactones were isolated, two of which showed significant ant-repellency. 相似文献
6.
Four known sesquiterpene lactones, tomentosin, ivalin, 4-epi-isoinuviscolide and gaillardin, together with three new lactones, inuchinenolides A, B and C, were identified in the whole plant of Inula britannica var. chinensis. 相似文献
7.
Three sesquiterpene lactones, 2′,3′-dihydroniveusin-A, 2′,3′-dihydroniveusin-B and 3-acetylchamissonin, were isolated from the dichloromethane extract of leaves of Viguiera deltoidea. The structures were established on the basis of physical and spectroscopic data and that of 3-acetylchamissonin was also confirmed by X-ray analysis. 相似文献
8.
Eloy Rodriguez 《Biochemical Systematics and Ecology》1977,5(3):207-218
Over 20 taxa of the genus Partenium (Compositae) representing four sections or five ecological groupings from throughout the Americas, were examined for sesquiterpene lactones, flavonoids and alkaloids. The tropical thorn-forest, arborescent members (sect. Parthenichaeta) were found to contain three different sesquiterpene lactone types and derivatives of the flavonols; quercetin, kaempferol and quercetagetin. The desert shrubs were remarkable for their high production of methylated quercetagetin flavonols and alkaloids, but lacked any appreciable amounts of sesquiterpene lactones. The temperate, submontane perennials (sect. Bolophytum), contained lactones and flavonols in extremely low concentrations. The herbaceous annuals (sect. Argyrochaeta) contained pseudoguaianolides only and together with quercetin, and kaempferol . The herbaceous perennials contained twice as many lactones and flavonoids as the annuals. It is suggested that the ecogeographical distribution of secondary products in Parthenium is probably a result of adaptive responses to various physical and biotic factors (herbivore pressure) in the environment. 相似文献
9.
M.A. Metwally S. El-Dahmy J. Jakupovic F. Bohlmann A.M. Dawidar S.A. Metwally 《Phytochemistry》1985,25(1):255-257
The aerial parts of Cotula cinerea gave, in addition to widespread compounds, a characteristic diacetylenic spiroketal enolether and several sesquiterpene lactones, three of them being glaucolide-like lactones. The structures were elucidated by highfield 1H NMR spectroscopy. 相似文献
10.
Ferdinand Bohlmann Elena Tsankova Robert M. King Harold Robinson 《Phytochemistry》1984,23(5):1099-1101
The investigation of the aerial parts of Mikania cynanchifolia afforded, in addition to miscandenin, five new sesquiterpene lactones, miscandenin-1,2-epoxide, an isomiscandenin and three further dilactones related to mikanolide. The structures of these new compounds were elucidated by high field 1H NMR spectroscopy. The biogenetic relationships of the sesquiterpene lactones are briefly discussed. 相似文献
11.
Two allyl hydroperoxy guaianolide sesquiterpene lactones (peroxyeupahakonin-A and -B) and five new guaianolides (eupahakonin-A and -B, eupahakonenin-A and -B, and eupahakonesin) were isolated from E. chinense and characterized. The allyl hydroperoxy sesquiterpene lactones were characterized by spectral and chemical methods. They were prepared chemically by photosensitized oxygenation of eupahakonin-A. 相似文献
12.
Alfonso G. Ober Leovigildo Quijano Lowell E. Urbatsch Nikolaus H. Fischer 《Phytochemistry》1984,23(6):1289-1292
Chemical analysis of Calea subcordata yielded three new guaianolides, 8-epi-isobutyrylrupicolin A, 8-epi-isobutyrylrupicolin B and subcordatolide A, which represent the first guaianolide-type sesquiterpene lactones reported in the genus Calea. The structures of the new compounds were established by chemical and spectroscopic methods. 相似文献
13.
Two new sesquiterpene lactones, desacetyllanuginolide and michefuscalide were isolated from Michelia fuscata along with two known lactones, dehydrolanuginolide, lipiferolide and a lignan, syringaresinol. The structures of desacetyllanuginolide and michefuscalide were determined by spectral and chemical methods. 相似文献
14.
The aerial parts of Eupatoriastrum nelsonii afforded, in addition to known sesquiterpene lactones, four new lactones all closely related to the germacranolides isolated previously from other genera of the tribe Eupatorieae. The structures were elucidated by spectroscopic methods. Chemotaxonomic aspects are discussed briefly. 相似文献
15.
Eight sesquiterpene lactones were isolated from Centaurea solstitialis (yellow starthistle). They are solstitialin A, repin, subluteolide, acroptilin, janerin, cynaropicrin, and the new lactones solstitiolide and episolstitiolide. 相似文献
16.
Investigation of the plant growth inhibitory activity of the extract of the liverwort, Conocephalum conicum afforded five sesquiterpene lactones, tulipinolide, zaluzanin C, zaluzanin D, 8α-acetoxyzaluzanin C and 8α-acetoxy-zaluzanin D. The latter two compounds are reported for the first time. Tulipinolide is responsible for the characteristic pungency of the female gametophyte of C. conicum. The guaianolides showed inhibitory activity toward the germination and growth of roots of rice in the husk. The male gametophyte of C. conicum indicated no pungency, showing the lack of tulipinolide. 相似文献
17.
Five germacranolide sesquiterpene lactones and a trachylobane diterpene were isolated from the hexaploid species Helianthus californicus. Four of the sesquiterpene lactones are new, including a 1-oxo-3,10-diol without any carbon-carbon double bonds in the main ring whose structure was confirmed by X-ray crystallography. These results require revision of the structures of several previously published compounds. Two of the germacranolides have alkyl ether functions at a position β to a ketone and are believed to be artifacts of the isolation process. Based on terpenoid chemistry, there are no obvious progenitors of H. californicus among the diploid species of Helianthus examined to date. 相似文献
18.
In recent years we initiated extensive studies on the characterization of the population structure of wild Lactuca relatives (WLRs) originating from their center of origin and diversity in Southwest Asia. A comparative phytochemical study of nine sesquiterpene lactones in natural populations of the wild lettuce L. altaica Fisch. & C.A. Mey. (Asteraceae) was performed, based on 22 plants, representing seven original individual seed samples derived from three localities representing three regions in Armenia. The compounds were profiled and quantified in leaves and roots of the plants, grown in a controlled glasshouse. The contents of major sesquiterpene lactones, that including the following eight guaianolides: cichorioside B, lactucin, 11β,13-dihydrolactucin, crepidiaside B, 8-deoxylactucin, jacquinelin, lactucopicrin/11β,13-dihydrolactucopicrin, as well as the germacranolide glucoside – lactuside A, were estimated by HPLC/PDA. The L. altaica plants could be characterized by the occurrence of lactuside A in their roots, and the mixture of lactucopicrin/11β,13-dihydrolactucopicrin in both their roots and leaves by relatively high amounts, similarly to results obtained for three commercial cultivars of L. sativa. The total content of sesquiterpene lactones in the roots was significantly higher than that in the leaves. This study is likely the first report of detailed screening of L. altaica natural populations and individuals, even by low sample size, for any trait. Species within the primary lettuce gene pool, should be considered as an attractive source of germplasm in further research and improvement of cultivated lettuce, Lactuca sativa L. While using interspecific hybridization in order to elevate the sesquiterpene levels in cultivated lettuces, the lactones quality (profile) and quantity, as well as the cross-ability level of the wild Lactuca spp. with the crop and fertility of the obtained offspring should be considered. 相似文献
19.
The components of the two major classes of natural products of the composite Encelia farinosa, sesquiterpene lactones and benzopyrans/benzofurans (chromenes), were resolved and quantified by high performance liquid chromatography. Geographic variation was examined over a range of mesic and xeric populations from California and Arizona (USA). The concentration of farinosin, a sesquiterpene lactone, varies significantly between individuals and seasonally within individuals. Ontogenetic comparisons revealed interpopulation variations within sesquiterpene lactones and chromenes. A geographic survey suggests the presence of two putative chemical races which vary in the amounts of sesquiterpene lactones and chromenes present. The adaptive significance of this quantitative variation is discussed. 相似文献
20.
Walter Vichnewski Palaniappan Kulanthaivel Virgil L. Goedken Werner Herz 《Phytochemistry》1985,24(2):291-296
The structures and stereochemistries of two sesquiterpene lactones from Trichogonia gardneri were established as (6R,7S,8S,9S,IOR)-4E-9,10-dihydroxy-8-tigloxygermacr-4-en-6,12-olide) and (5R*,6R*,7S*,8S*,9R*)-14-acetoxy-3-chloro-9-hydroxy-2-oxo-8-tigloxyguia-1(10),3-dien-6,12-of olide by a combination of NMR spectrometry and X-ray diffraction. The results show that the structures of several sesquiterpene lactones which were isolated previously from related species require revision. 相似文献