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Publications - Molecular Signal Processing

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Displaying results 61 to 70 of 379.

Publications

Chen, D.L.; Delatorre,.C.A.; Bakker, A.; Abel, S. Conditional identification of phosphate starvation-response mutants in <span style="font-style: italic;">Arabidopsis thaliana</span> Planta 211, 13 - 22, (2000)

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Publications

Quint, M.; Melchinger, A.E.; Dussle, C.M.; Lübberstedt, T. Breeding for virus resistance in maize Genetika 32, 283-291, (2000)

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Publications

Colon-Carmona, A.; Chen, D.L.; Yeh, K.C.; Abel, S. Aux/IAA proteins are phosphorylated by phytochrome in vitro Plant Physiology 124, 1728-1738, (2000)

Auxin/indole-3-acetic acid (Aux/IAA) genes encode short-lived transcription factors that are induced as a primary response to the plant growth hormone IAA or auxin. Gain-of-function mutations in Arabidopsis genes,SHY2/IAA3, AXR3/IAA17, andAXR2/IAA7 cause pleiotropic phenotypes consistent with enhanced auxin responses, possibly by increasing Aux/IAA protein stability. Semidominant mutations shy2-1D,shy2-2, axr3-1, and axr2-1induce ectopic light responses in dark-grown seedlings. Because genetic studies suggest that the shy2-1D andshy2-2 mutations bypass phytochrome requirement for certain aspects of photomorphogenesis, we tested whether SHY2/IAA3 and related Aux/IAA proteins interact directly with phytochrome and whether they are substrates for its protein kinase activity. Here we show that recombinant Aux/IAA proteins from Arabidopsis and pea (Pisum sativum) interact in vitro with recombinant phytochrome A from oat (Avena sativa). We further show that recombinant SHY2/IAA3, AXR3/IAA17, IAA1, IAA9, and Ps-IAA4 are phosphorylated by recombinant oat phytochrome A in vitro. Deletion analysis of Ps-IAA4 indicates that phytochrome A phosphorylation occurs on the N-terminal half of the protein. Metabolic labeling and immunoprecipitation studies with affinity-purified antibodies to IAA3 demonstrate increased in vivo steady-state levels of mutant IAA3 in shy2-2 plants and phosphorylation of the SHY2-2 protein in vivo. Phytochrome-dependent phosphorylation of Aux/IAA proteins is proposed to provide one molecular mechanism for integrating auxin and light signaling in plant development.
Publications

Feussner, I.; Kühn, H.; Wasternack, C. The lipoxygenase dependent degradation of storage lipids Trends Plant Sci. 6, 268-273, (2001)

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Publications

Weichert, H.; Kohlmann, M.; Wasternack, C.; Feussner, I. Lipids and signalling: oxylipins 3 - functional aspects Biochem. Soc. Trans. 28, 861-862, (2001)

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Publications

Li, G.; Goyal, G.S.; Abel, S.; Quiros, C.F. Inheritance of three major genes involved in the synthesis of aliphatic glucosinolates in <em>Brassica oleracea</em> J Amer Soc Hort Sci 126, 427 - 431, (2001)

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Publications

Abel, S.; Köck, M. Secretory ribonucleases from tomato (Lycopersicon esculentum cv. Mill.) Meth Enzymol 341, 351 - 368, (2001)

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Publications

Hilpert, B.; Bohlmann, H.; Den Camp, R.O.; Przybyla, D.; Miersch, O.; Buchala, A.; Apel, K. Isolation and characterization of signal transduction mutants of <EM>Arabidopsis thaliana</EM> that constitutively activate the octadecanoid pathway and form necrotic microlesions Plant J. 26, 435-446, (2001)

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Publications

Weichert, H.; Kolbe, A.; Wasternack, C.; Feussner, I. Formation of 4-hydroxy-1-alkenals in barley leaves Biochem. Soc. Trans. 28, 850-851, (2001)

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Publications

Berger, S.; Weichert, H.; Porzel, A.; Wasternack, C.; Kühn, H.; Feussner, I. Enzymatic and non-enzymatic lipid peroxidation in leaf development Biochim. Biophys. Acta 1533, 266-276, (2001)

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