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- W1987207832 abstract "INTRODUCTIONLiverworts are known to be a rich source of terpenoidsand phenolic compounds which constitute the oil bodies.From these plants a high diversity of substances has beenisolated, including new structure types, some of themwith interesting biological activities (Asakawa, 1989).Since only a few species of liverworts have beenphytochemically investigated (less than 5% of knownspecies), many interesting substances remain to beisolated. However, advances on the study of thechemistry of these plants are hindered by the difficultyin collecting a sufficient quantity of pure material ofcertain species. Their small size and the fact thatliverworts usually grow mixed with other bryophytesand are strongly attached by their rhizoids to the soil,make their purification a difficult and time consumingtask (Becker and Harrison, 1987; Asakawa, 1989). Invitro cultures of liverworts can be a good alternative,producing sufficient and homogenous amounts of plantmaterial for subsequent analysis (One et al., 1992; Takaziet al., 1995).The genus Asterella contains approximately 80 species(Frahm and Frey, 1983) but only a few have been studiedphytochemically: Asterella augusta, A. odora; A. aus-tralis; A. tenera, A. lindenbergiana; A. venosa (Asakawaand Heidelberger, 1982). In this work, we report theisolation and structural elucidation of three hopane typetriterpenoids and one flavonoid, from in vitro cultures ofAsterella blumeana. The structures are shown in Figures1 and 2.MATERIAL AND METHODSPlant material and culture conditions. Plants of theliverwort Asterella blumeana (Nees) Pande´ Srivastava etKhen grown in vitro, obtained from the culture collectionof autotrophic organisms of the Institute of Botany,Trebon, Czech Republic, were subcultured on fresh B5medium (Gamborg et al., 1968) every 2 months andmaintained in a photoperiod of 16 h light (30 mol/m" @default.
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- W1987207832 date "1998-01-01" @default.
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- W1987207832 title "Three triterpenoids and one flavonoid from the liverwort Asterella blumeana grown in vitro" @default.
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- W1987207832 doi "https://doi.org/10.1002/(sici)1099-1573(1998)12:1+<s21::aid-ptr238>3.0.co;2-1" @default.
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