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Wound-induced gene expression changes in Populus: 90 hours; clone RM5

ABSTRACT: Gene expression response of Populus plants subjected to leaf wounding was analyzed using the Affymetrix poplar genome microarrays. Keywords: Stress response

ORGANISM(S): Populus fremontii x Populus angustifolia Populus sp.

PROVIDER: GSE16785 | GEO | 2009/12/01

SECONDARY ACCESSION(S): PRJNA122655

REPOSITORIES: GEO

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Transcription profiling of Populus to investigate wound-induced gene expression changes: 90 hours; clone RM5

Project description:Gene expression response of Populus plants subjected to leaf wounding was analyzed using the Affymetrix poplar genome microarrays. Experiment Overall Design: Populus fremontii x angustifolia genotypes were grown hydroponically.Â Wounding treatment was applied by pinching leaves at Leaf Plastchron Index (LPI) 8-12 with pliers at a rate of 10 1-inch wounds per leaf.Â Root tips (terminal 1 cm) and mature leaves (LPI 5) were sampled 90 hours after the treatment. Two biological replicates were obtained for each condition.

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Project description:Expression of defense response-related transcripts could be affected upon leaf wounding such as after excision of leaf disks. In this experiment, transcripts were isolated from whole leaves and 5-cm2 excised leaf disks samples from interaction assays between leaves of the 'Beaupré' poplar cultivar (Poplus trichocarpa x Poplus deltoides) and virulent (98AG31, compatible interaction) and avirulent (93ID6, incompatible interaction) urediniospores of Melampsora larici-populina, the fungus responsible for the foliar rust disease in poplar. For each type of interaction, three samples were collected in a time-course series (18, 21 and 24 hpi for strain 93ID6, and 18, 24 and 48 hpi for strain 98AG31). Both leaf disks and whole leaves were inoculated in strictly similar conditions, so differential transcript expression is likely attributable to the wounding effect in leaf disks. The aim of this study is to identify genes that are induced by wounding in leaf disks compared with whole leaves. For this purpose, cDNA templates were used for hybridization on poplar oligoarrays.

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Transcription profiling of Populus leaves under nitrogen limitation

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