Transcription profiling by array of Medicago truncatula border cells, root tips and whole roots
Ontology highlight
ABSTRACT:
ORGANISM(S): Medicago truncatula
SUBMITTER: Yuhong Tang
PROVIDER: E-MEXP-2883 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
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Project description:The experiment aims to analyze the effect of inoculation with Sinorhizobium medicae MD4 of on the transcriptome of the Medicago truncatula roots of N-limited plants. We divided the roots systems into two parts; one of them was supplied with nutrient solution with mineral N (0.5 mM for N-limited plants) whereas the non-N treated part was kept in nutrient solution without mineral N. All roots were inoculated 48h after initiation of the N treatments. We collected the roots the non-N treated side of the split roots system and we isolated total RNA for RNAseq analysis. Root transcriptomes were analyze before inoculation, at 1 and 2 days post-inoculation.
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Project description:Rhizobium and allied bacteria form symbiotic nitrogen-fixing nodules on legume roots. Plant hormones appear to play a role in nodule formation. We treated Medicago truncatula roots with auxin transport inhibitors (ATIs) N-(1-naphthyl)phthalamic acid (NPA) and 2,3,5-triiodobenzoic acid (TIBA) to induce the formation of pseudonodules. We compared the transcriptional responses of M. truncatula roots treated with ATIs to roots inoculated with Sinorhizobium meliloti. The transcriptional response of M. truncatula roots 1 and 7 days after ATI treatment were opposite to roots treated with S. meliloti. Three independent biological replicates were performed for each treatment (buffer, ATI and wild-type bacteria) at 21 days after treatment.
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