Crosstalk and differential response to abiotic and biotic stressors reflected at the transcriptional level of effector genes from secondary metabolism
Glombitza, SabineDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Dubuis, Pierre-HenriPlant Biology, Department of Biology, University of Fribourg, Switzerland
Thulke, OliverDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Welzl, GerhardDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Bovet, LucienPlant Biology, Department of Biology, University of Fribourg, Switzerland
Götz, MichaelDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Affenzeller, MatthiasDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Geist, BirgitDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Hehn, AlainDepartment of Plant Stress Response, Institute of Plant Molecular Biology, Université Louis Pasteur, Strasbourg, France
Asnaghi, CarolePlant Biology – Molecular Plant Physiology, University of Zurich, Switzerland
Ernst, DieterDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Seidlitz, HaraldDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Gundlach, HeidrunDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Mayer, KlausDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
Martinoia, EnricoPlant Biology – Molecular Plant Physiology, University of Zurich, Switzerland
Werck-reichhart, DanieleDepartment of Plant Stress Response, Institute of Plant Molecular Biology, Université Louis Pasteur, F-67083 Strasbourg Cedex, France
Mauch, FelixPlant Biology, Department of Biology, University of Fribourg, Switzerland
Schäffner, AntonDepartment of Environmental Engineering, Institute of Biochemical Plant Pathology, Institute of Developmental Genetics, Institute of Bioinformatics, MIPS, and Institute of Soil Ecology GSF – National Research Center for Environment and Health, Neuherberg, Germany
English
Plant secondary metabolism significantly contributes to defensive measures against adverse abiotic and biotic cues. To investigate stress-induced, transcriptional alterations of underlying effector gene families, which encode enzymes acting consecutively in secondary metabolism and defense reactions, a DNA array (MetArray) harboring gene-specific probes was established. It comprised complete sets of genes encoding 109 secondary product glycosyltransferases and 63 glutathione-utilizing enzymes along with 62 cytochrome P450 monooxygenases and 26 ABC transporters. Their transcriptome was monitored in different organs of unstressed plants and in shoots in response to herbicides, UV-B radiation, endogenous stress hormones, and pathogen infection. A principal component analysis based on the transcription of these effector gene families defined distinct responses and crosstalk. Methyl jasmonate and ethylene treatments were separated from a group combining reactions towards two sulfonylurea herbicides, salicylate and an avirulent strain of Pseudomonas syringae pv. tomato. The responses to the herbicide bromoxynil and UV-B radiation were distinct from both groups. In addition, these analyses pinpointed individual effector genes indicating their role in these stress responses. A small group of genes was diagnostic in differentiating the response to two herbicide classes used. Interestingly, a subset of genes induced by P. syringae was not responsive to the applied stress hormones. Small groups of comprehensively induced effector genes indicate common defense strategies. Furthermore, homologous members within branches of these effector gene families displayed differential expression patterns either in both organs or during stress responses arguing for their non-redundant functions.