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Quercetin 3,7,3′-trisulphate from Flaveria bidentis
Phytochemistry, 1985Abstract From leaves of Flaveria bidentis a new quercetin trisulphate was isolated and characterized as quercetin 3,7,3′-trisulphate by means of spectroscopic (UV, 1 H NMR, 13 C NMR) and chemical methods.
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Planta, 1991
Photosynthetic rates and related anatomical characteristics of leaves developed at three levels of irradiance (1200, 300 and 80 umol · m(-2) · s(-1)) were determined in the C4-like species Flaveria brownii A.M. Powell, the C3-C4-intermediate species F. linearis Lag., and the F1 hybrid between them (F. brownii × F. linearis). In the C3-C4 and F1 plants,
J L, Araus +3 more
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Photosynthetic rates and related anatomical characteristics of leaves developed at three levels of irradiance (1200, 300 and 80 umol · m(-2) · s(-1)) were determined in the C4-like species Flaveria brownii A.M. Powell, the C3-C4-intermediate species F. linearis Lag., and the F1 hybrid between them (F. brownii × F. linearis). In the C3-C4 and F1 plants,
J L, Araus +3 more
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Phototoxic substances from Flaveria trinervis and Simira salvadorensis
Phytochemistry, 1983Abstract Phototoxic secondary metabolites are reported from Flaveria trinervis and Simira salvadorensis . A sensitive test for phototoxicity to Saccharomyces cereviceae was used to identify activity in plant material, crude extracts and purified compounds.
Thor Arnason +5 more
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Planta, 1996
Two major indicators were used to access the degree of photorespiration in various photosynthetic types of Flaveria species (C3, C3-C4, C4-like, and C4): the O2 inhibition of photosynthesis measured above the O2 partial pressure which gives a maximum rate, and O2- and light-dependent whole-chain electron flow measured at the CO2 compensation point (Γ).
Ziyu, Dai +2 more
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Two major indicators were used to access the degree of photorespiration in various photosynthetic types of Flaveria species (C3, C3-C4, C4-like, and C4): the O2 inhibition of photosynthesis measured above the O2 partial pressure which gives a maximum rate, and O2- and light-dependent whole-chain electron flow measured at the CO2 compensation point (Γ).
Ziyu, Dai +2 more
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Quercetin and patuletin 33′-disulphates from flaveria chloraefolia
Phytochemistry, 1987Abstract Quercetin 3,4′-disulphate and an equimolar mixture of two novel flavonol sulphates, quercetin 3,3′-disulphate and patuletin 3,3′-disulphate, were isolated from the butanolic extract of the leaves of Flaveria chloraefolia. Purification of these components was carried out by gel filtration, and their structures elucidated by UV, IR, 1H and 13C
Denis Barron, Ragai K. Ibrahim
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Coastal Plain Yellowtops Flaveria bidentis (L.) Kuntze
2017The coastal plain yellowtops, Flaveria bidentis (L.) Kuntze, a C4 annual or perennial herb native to South America, has damaged local ecosystems and caused great economic loss in China. Its large seeds, strong ability to adapt to different environmental conditions and strong allelopathy to inhibit the growth of other plants lead to its expansion to ...
Fengjuan Zhang, Fanghao Wan
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Anticoagulant effect and action mechanism of sulphated flavonoids from Flaveria bidentis
Thrombosis Research, 2002Quercetin 3-acetyl-7,3',4'-trisulphate (ATS) and quercetin 3,7,3',4'-tetrasulphate (QTS) obtained from Flaveria bidentis (Asteraceae) were investigated in vitro for anticoagulant activity. Three different concentrations of each flavonoid were assayed at different incubation times, showing at 1 mM significant prolongation on the activated partial ...
Hugo A, Guglielmone +3 more
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European journal of biochemistry, 1997
C4 phosphoenolpyruvate (P-pyruvate) carboxylases have evolved from ancestral C3 P-pyruvate carboxylases during the evolution of C4 photosynthesis (Lepiniec et al., 1994). To meet the requirements of a new metabolic pathway, the C4 enzymes have gained distinct kinetic and regulatory properties compared to C3 enzymes.
P, Svensson, O E, Bläsing, P, Westhoff
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C4 phosphoenolpyruvate (P-pyruvate) carboxylases have evolved from ancestral C3 P-pyruvate carboxylases during the evolution of C4 photosynthesis (Lepiniec et al., 1994). To meet the requirements of a new metabolic pathway, the C4 enzymes have gained distinct kinetic and regulatory properties compared to C3 enzymes.
P, Svensson, O E, Bläsing, P, Westhoff
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Isorhamnetin 3,7-disulphate from Flaveria bidentis
Phytochemistry, 1977José L. Cabrera, Héctor R. Juliani
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