Flaveria

Aus Flaveria repanda warden das cis-trans-Isomerenpaar CCCXXIV sowie als erstes, optisch aktives Polyinsulfoxyd CCCXXV isoliert, deren Beziehungen zum Pentainen LI offensichtlich sind ... 

Mild extraction was also found to be effective in the analysis of extracts of Flaveria haumanii, l in which quercetin, kaempferol, isorhamnetin as well as their glycosides and sulfate esters were identified. The obtained results were useful in the identification of the colourants from fibres from pre-Columbian Andean textiles extracted with the use of water-methanol solution with formic or hydrochloric acid. The components of each extract were separated on a reversed phase HPLC column and the eluates were monitored at... 

Flaveria haumanii, Cotinus coggygria, Coreopsis spp. and pre Columbian Andean textiles Okanine, luteolin, butein (as aglycones, glycosides or as methyl ethers), quercetin, isorhamnetin (as sulfate esters), sulfuretin, fisetin, hydroxybenzoic acids HCI/Me0H/H20, HCOOH/MeOH A H20 B ACN C H20 with HCOOH 254, 350 nm/ESI (+) Column C4 7... 

Ananvoranich, S. et al.. Cloning and regulation of fiavonol 3-sulfotransferase in cell-suspension cultures of Flaveria bidentis. Plant Physiol, 106, 485, 1994. 

Holtum Winter, 1982) and during C4 development (e.g. Nelson Langdale, 1989). It is to be hoped that in addition to more work on gene structure and expression, additional work will be focused on the biochemistry and structure of the enzymes. Interest in the developmental aspects of the establishment of the C4 pathway, in plants such as Flaveria (Adams et al., 1986) that contain interfertile C3, C3/C4 intermediate, and C4 species, and in CAM as a water-conserving pathway, should be sufficient reason to do this. 

Adams, C.A., Leung, F. Sun, S.S.M. (1986). Molecular properties of phosphoeno/pyruvate carboxylase from C3, C3-C4 intermediate, and C4 Flaveria species. Planta 167, 218-25. 

Hermans, J. Westhoff, P. (1990). Analysis of expression and evolutionary relationships of PEPCase genes in Flaveria trinervia (C4) and F. pringlei (Q). Molecular and General Genetics 224, 459-68. 

VARIN, L., BARRON, D., IBRAHIM, R.K., Identification and biosynthesis of sulfated and glucosylated flavonoids in Flaveria bidentis. Z. Naturforsch, 1986, 41c, 813-819. 

Flavonoids (quercetin 3-sulfate, quercetin Dye from Flaveria Pre-Columbian Andean APCI operating in positive- and negative-ion... 

Wei Y, Xie QQ, Fisher D, Sutherland lA (2011) Separation of patuletin-3-O-glucoside, astragalin, quercetin, kaempferol and isorhamnetin from Flaveria bidentis (L.) Kuntze by elution-pump-out high-performance counter-current chromatography. J Chromatogr A 1218 6206-6211... 

Xie QQ, Wei Y, Zhang GL (2010) Separation of flavonol glycosides from Flaveria bidentis (L.) Kuntze by high-speed counter-current chromatography. Sep Purif Technol 72 229-233... 

Isol. from roots of Flaveria repanda, E. sphaerocephalus, Buphthalmum salicifolium, B. grandiflorum and Bidens dahlioides. Yellowish cryst. (pet. ether). Mp 53.5°. Deoxy [1137-83-3]. 5- S-Buten-l-ynyt)-5 -methyl- 2 -bithienyl... 

Isol. from roots of Flaveria repanda and Guzotia abyssinica. Cryst. (pet. ether). Mp 80° dec. 

Grandmaison, J. Ibrahim, R.K. (1996). Evidence for nuclear protein binding of flavonol sulfate esters in Flaveria chloraefolia. Journal of Plant Physiology, 147, 653-660. 

Sulfate transfer to flavonoids and glncosinolate precmsors is catalyzed by a small family of soluble sulfotransferases (STs) that use 3 -phos-phoadenosine 5 -phosphosulfate (PzM S) as sulfate donor (Fig. 5). Snlfated flavonols may play a role in the transport of auxins [113], Four position-specific flavonol STs are found in plants of the genus Flaveria, with preferences for the 3-position of the flavonoid aglycone, the 3 and 4 -positions of 3-sulfate derivatives, and the 7-position of 3,3 - or 3,4 -disulfate derivatives [113] (Fig. 5). 

Scheme 5. Sulfur introduction into an acyclic polyacetylene in Flaveria repanda...

---