Heidrun Halbwirth
Vienna University of Technology
28 Papers
68 Citations
Heidrun Halbwirth is an academic researcher from Vienna University of Technology. The author has contributed to research in topics: Biology & Malus. The author has an hindex of 17, co-authored 26 publications. Previous affiliations of Heidrun Halbwirth include University of Vienna.
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Papers
Molecular cloning, substrate specificity of the functionally expressed dihydroflavonol 4-reductases from Malus domestica and Pyrus communis cultivars and the consequences for flavonoid metabolism
TL;DR: The heterologously expressed DFR/FNR enzymes of Malus and Pyrus possess distinct differences in substrate specificities despite only minor differences of the amino acid sequences, and the occurrence of 3-deoxyflavonoids in vivo after application of prohexadione-Ca can be explained.
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Growth-promoting nitrogen nutrition affects flavonoid biosynthesis in young apple (Malus domestica Borkh.) leaves.
T. Strissel,Heidrun Halbwirth,U. Hoyer,U. Hoyer,C. Zistler,C. Zistler,Karl Stich,Dieter Treutter +7 more
TL;DR: The inhibition of flavonoids accumulation by high N nutrition could be confirmed, but the influence of N supply on the flavonoid enzymes CHS/CHI, FHT, DFR, and FLS was not evident and PAL activity seems to be downregulated, thus forming a bottleneck resulting in a generally decreased Flavonoid accumulation.
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Transgenic apple plants overexpressing the Lc gene of maize show an altered growth habit and increased resistance to apple scab and fire blight
Henryk Flachowsky,Iris Szankowski,Thilo C. Fischer,Klaus Richter,Andreas Peil,Monika Höfer,Claudia Dörschel,Sylvia Schmoock,Achim E. Gau,Heidrun Halbwirth,Magda-Viola Hanke +10 more
TL;DR: Greenhouse plants investigated in this study exhibit altered phenotypes with regard to growth habit and resistance traits, which seem to be in accordance with a direct or an indirect effect on polar-auxin-transport in the transgenic plants.
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Induction of antimicrobial 3-deoxyflavonoids in pome fruit trees controls fire blight.
Heidrun Halbwirth,Thilo C. Fischer,Susanne Roemmelt,Francesco Spinelli,Karin Schlangen,Silke Peterek,E. Sabatini,Christian Messina,John-Bryan Speakman,Carlo Andreotti,Wilhelm Rademacher,C. Bazzi,Guglielmo Costa,Dieter Treutter,Gert Forkmann,Karl Stich +15 more
TL;DR: A new approach allows transient inhibition of a step in the flavonoid pathway, thereby inducing the formation of a novel antimicrobial 3-deoxyflavonoid controlling fire blight in apple and pear leaves.
Investigation of the biosynthesis of 3-deoxyanthocyanins in Sinningia cardinalis
Christopher S. Winefield,David H. Lewis,Ewald E. Swinny,Huaibi Zhang,H. Steve Arathoon,Thilo C. Fischer,Heidrun Halbwirth,Karl Stich,Christian Gosch,Gert Forkmann,Kevin M. Davies +10 more
TL;DR: A mechanism of 3-deoxyflavonoid biosynthesis in sinningia similar to that reported for Zea mays is suggested, in which lack of F3H activity allows action of the DFR/FNR on flavanone substrates and production of flavan-4-ols.
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