Auxin Induced Endodermal to QC Transdifferentiation Time Series and Downsteam of JKD Analysis
Ontology highlight
ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
SUBMITTER: Kenneth Birnbaum
PROVIDER: E-GEOD-61408 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:Publication title: Pseudonodule formation by wild type and symbiotic mutant Medicago truncatula in response to auxin transport inhibitors This SuperSeries is composed of the following subset Series: GSE27991: Expression data of Medicago truncatula Jemalong A17 roots treated with auxin transport inhibitors GSE28171: Expression data of Medicago truncatula Jemalong A17 roots treated with S. meliloti exoA mutant or auxin transport inhibitors GSE28172: Expression data of Medicago truncatula skl1-1 roots treated with S. meliloti wild-type or auxin transport inhibitors GSE28173: Genes differentially expressed in wild-type Medicago truncatula plants during nodulation Refer to individual Series
2011-03-25 | E-GEOD-28174 | biostudies-arrayexpress
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 to five independent biological replicates were performed for each treatment (buffer, exoA bacteria and ATI) at 21 days after treatment.
2011-03-25 | E-GEOD-28171 | biostudies-arrayexpress
Project description:In this study a comparison was made between the local transcriptional changes at two time points upon root knot (Meloidogyne graminicola) and migratory nematode (Hirschmanniella oryzae) infection in rice. Using mRNA-Seq we have characterized specific and general responses of the root challenged with these endoparastic root nematodes with very different modes of action. Root knot nematodes induce major developmental reprogramming of the root tip, where they force the cortical cells to form multinucleate giant cells, resulting in gall-development. Our results show that root knot nematodes force the plant to produce and transfer nutrients, like sugars and amino acids, to this tissue. Migratory nematodes, on the other hand, induce the expression of proteins involved in plant death and oxidative stress, and obstruct the normal metabolic activity of the root. While migratory nematode infection also causes upregulation of biotic stress-related genes early in the infection, the root knot nematodes seem to actively suppress the local defence of the plant root. This is exemplified by a downregulation of genes involved in the salicylic acid and ethylene pathways. Interestingly, hormone pathways usually involved in plant development, were strongly induced (auxin and gibberellin) or repressed (cytokinin) in the galls. In addition, thousands of novel transcriptionally active regions as well as highly expressed nematode transcripts were detected in the infected root tissues. These results uncover previously unrecognized nematode-specific expression profiles and provide an interesting starting point to study the physiological function of many yet unannotated transcripts potentially targeted by these nematodes. 2 or 3 biological replicates of nematode infected roots and root tips and their respective controls were sampled at two time points (1 biological replicate contains pooled tissue from 6 plants)
2013-01-10 | E-GEOD-35843 | biostudies-arrayexpress
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 at each time point (1 and 7 days after treatment) for each treatment (buffer and ATI).
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Project description:We report the discovery of a root growth program in Arabidopsis that is independent of a functional quiescent center (QC). In this regulatory program, PHABULOSA (PHB), posttranscriptionally regulated by SHR and SCR, plays a central role. In phb shr and phb scr mutants, root meristem/growth activity recovers significantly. Interestingly, this recovery does not accompany the resurgence of QC cells. PHB regulates apical root growth in stele cells of the root meristem, located proximal to the QC. Our genome-wide investigation suggests that PHB exerts its influence on root growth by regulating auxin-cytokinin homeostasis. Apical root growth was restored when cytokinin levels were genetically reduced in the shr mutant. Conversely, when miRNA-resistant PHB was expressed in the root stele cells, apical root growth and meristem functions were significantly inhibited without blocking the QC identity. Taken together, our investigation reveals two mechanisms through which SHR regulates root growth and stem cell activities: one is to specify and maintain the QC and the other is to regulate the proximal meristem activity through PHB and cytokinin. In this regulation, QC seems to be more involved in maintaining the M-bM-^@M-^\growth signalM-bM-^@M-^] and thus ensure the indeterminate root growth. Total 7 samples (2 replicates of shr-2 mutant (high PHABULOSA expression) vs. 2 replicates of shr-2 phb-6 (low/absent PHABULOSA expression). 3 replicates of Wild type used as reference sample.
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2012-01-12 | E-GEOD-30367 | biostudies-arrayexpress
Project description:In order to identify the possible protein targets of cyanide in the regulation of root hair, we have carried out a single cell proteomic approach to characterize the protein atlas in wild type root hair cells compared to the cas-c1 mutant cells. Root hair specific cells were obtained from isolated protoplast from root tissues of Arabidopsis wt-pCOBL9:GFP and cas-c1-pCOBL9:GFP lines. To analyze the effect of the CAS-C1 mutation, we isolated 1 x 106 root hair cells by Fluorescence-activated cell sorting (FACS) from three independent replicate of wt-pCOBL9:GFP and cas-c1-pCOBL9:GFP roots. The extracted proteins from each sample were trypsin-digested and the digested peptides were analyzed by liquid chromatography-high resolution mass spectrometry (LC-MS/MS) for protein identification. In wild type samples, we have identified 3829 unique proteins at a false discovery rate below 1% (FDR<1%), that represent almost 10% of the total Arabidopsis proteome. In protein extract of the cas-c1-pCOBL9:GFP roots samples, we have identified 3972 proteins of which 3515 were commons in both cell types, 310 were only identified y wild type and 457 only in cas-c1 mutant (Fig. 5).
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