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30 results for “auxin signalling”
Data from: Transcriptome analysis of apical meristem enriched bud samples for size dependent flowering commitment in Crocus sativus reveal role of sugar and auxin signalling
<p><strong>Background</strong></p> <p>Cultivation of <em>Crocus sativus</em> (saffron) faces challenges due to inconsistent flowering patterns and variations in yield. Flowering takes place in a graded way with smaller corms unable to produce flowers. Enhancing the productivity requires a comprehensive understanding of the underlying genetic mechanisms that govern this size based flowering initiation and commitment. Therefore, samples enriched with non-flowering and flowering apical buds from small (<6g) and large (>14g) corms were sequenced. </p> <p><strong>Methods and Results</strong></p> <p>Apical bud enriched samples from small and large corms were collected immediately after break of dormancy in July. RNA sequencing was performed using Illumina Novaseq 6000. <em>De-novo</em> transcriptome assembly and analysis using flowering committed buds from large corms at post-dormancy and their comparison with vegetative shoot primordia from small corms pointed out the major role of Auxin and ABA hormonal regulation. Many genes with known dual responses in flowering development and circadian rhythm like Flowering locus T and Cryptochrome 1 along with a transcript showing homology with small auxin upregulated RNA (SAUR) exhibited induced expression in flowering buds. Thorough prediction of <em>Crocus sativus</em> non-coding RNA repertoire has been carried out for the first time. Enolase was found to be acting as a major hub with protein-protein interaction analysis using Arabidopsis counterparts.</p> <p><strong>Conclusion</strong></p> <p>Transcripts belong to key pathways including phenylpropanoid biosynthesis, hormone signaling and carbon metabolism were found significantly modulated. KEGG assessment and protein-protein interaction analysis confirm the expression data. Findings unravel the genetic determinants driving the size-dependent flowering in <em>Crocus sativus</em>.</p>
Areal (+)-borneol modulates root morphology, auxin signalling and meristematic activity in Arabidopsis roots
<p>One of the characteristic aspects of odour sensing in humans is the activation of olfactory receptors in a slightly different manner to different enantiomers. Here, we focused on whether plants showed enantiomer-specific responses similar to that in humans. We exposed Arabidopsis seedlings to methanol (control) and (+)- or (−)-borneol, and found that only (+)-borneol reduced the root length. Furthermore, the root-tip width was more increased upon (+)-borneol exposure than upon (−)-borneol exposure. In addition, root-hair formation was observed near the root tip in response to (+)-borneol. Auxin signalling was strongly reduced in the root tip following exposure to (+)-borneol, but was detected following exposure to (−)-borneol and methanol. Similarly, in the root tip, the activity of Cyclin B1:1 was detected on exposure to (−)-borneol and methanol, but not on exposure to (+)-borneol, indicating that (+)-borneol inhibits the meristematic activity in the root. These results partially explain (+)-borneol-specific reduction in the root length of Arabidopsis. Our results indicate the presence of a sensing system specific for (+)-borneol in Arabidopsis.</p>
Areal (+)-borneol modulates root morphology, auxin signalling and meristematic activity in Arabidopsis roots
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Auxin signaling and vascular cambium formation enables storage metabolism in cassava tuberous roots
<p>Cassava storage roots are among the most important root crops worldwide and represent one of the most consumed staple foods in Sub-Saharan Africa. The vegetatively propagated tropical shrub can form many starchy tuberous roots from its stem. These storage roots are formed through the activation of secondary root growth processes. However, the underlying genetic regulation of storage root development is largely unknown. Here we report on distinct structural and transcriptional changes occurring during the early phases of storage root development. A pronounced increase in auxin-related transcripts and the transcriptional activation of secondary growth factors, as well as a decrease in gibberellin-related transcripts was observed during the early stages of secondary root growth. This was accompanied by increased cell wall biosynthesis, increased most notably during the initial xylem expansion within the root vasculature. Starch storage metabolism was activated only after the formation of the vascular cambium. The formation of non-lignified xylem parenchyma cells and the activation of starch storage metabolism coincided with increased expression of the KNOX/BEL genes <i>KNAT1</i>, <i>PENNYWISE</i> and <i>POUND-FOOLISH</i>, indicating their importance for proper xylem parenchyma function.</p>
Auxin signaling and vascular cambium formation enables storage metabolism in cassava tuberous roots
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Data from: Nod factors potentiate auxin signaling for transcriptional regulation and lateral root formation in Medicago truncatula
Nodulation (Nod) factors (NFs) are symbiotic molecules produced by rhizobia that are essential for establishment of the rhizobium–legume endosymbiosis. Purified NFs can stimulate lateral root formation (LRF) in Medicago truncatula, but little is known about the molecular mechanisms involved. Using a combination of reporter constructs, pharmacological and genetic approaches, we show that NFs act on early steps of LRF in M. truncatula, independently of the ethylene signaling pathway and of the cytokinin receptor MtCRE1, but in interaction with auxin. We conducted a whole-genome transcriptomic study upon NF and/or auxin treatments, using a lateral root inducible system adapted for M. truncatula. This revealed a large overlap between NF and auxin signaling and, more interestingly, synergistic interactions between these molecules. Three groups showing interaction effects were defined: group 1 contained more than 1500 genes responding specifically to the combinatorial treatment of NFs and auxin; group 2 comprised auxin-regulated genes whose expression was enhanced or antagonized by NFs; and in group 3 the expression of NF regulated genes was antagonized by auxin. Groups 1 and 2 were enriched in signaling and metabolic functions, which highlights important crosstalk between NF and auxin signaling for both developmental and symbiotic processes.
Data from: Nod factors potentiate auxin signaling for transcriptional regulation and lateral root formation in Medicago truncatula
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CINCINNATA Controls Surface Curvature of Antirrhinum Leaf by Coordinated and Direct Activation of Cytokinin and Auxin Signaling
GEO Series GSE40621. Arabidopsis thaliana; Antirrhinum majus. 10 samples. Type: Expression profiling by array.
Spatiotemporal brassinosteroid signaling and antagonism with auxin control Arabidopsis root growth.
GEO Series GSE52966. Arabidopsis thaliana. 18 samples. Type: Expression profiling by high throughput sequencing.
Interactions of ARF6 with PIF4, BZR1, and RGA integrate auxin signaling with environmental and other hormonal signals in Arabidopsis [RNA-Seq]
GEO Series GSE51772. Arabidopsis thaliana. 8 samples. Type: Expression profiling by high throughput sequencing.
ZEITLUPE regulates auxin signaling and the temporal gating of auxin responses that allow flowers to move
GEO Series GSE116648. Nicotiana attenuata. 6 samples. Type: Expression profiling by array.
Naked1 targets Topless to up-regulate Auxin signaling and suppress immunity
GEO Series GSE141597. Arabidopsis thaliana. 24 samples. Type: Expression profiling by high throughput sequencing.
TMK1-mediated transcriptional auxin signaling guides differential growth in plant
GEO Series GSE111716. Arabidopsis thaliana. 9 samples. Type: Expression profiling by high throughput sequencing.
Local light signalling at the leaf tip drives remote differential petiole growth through auxin-gibberellin dynamics
GEO Series GSE218944. Arabidopsis thaliana. 204 samples. Type: Expression profiling by high throughput sequencing.
CEPs suppress auxin signaling but promote cytokinin signaling to inhibit root growth in Arabidopsis
GEO Series GSE263493. Arabidopsis thaliana. 21 samples. Type: Expression profiling by high throughput sequencing.
Actin Cytoskeleton Integrates Auxin and Brassinosteroid Signaling in Plants.
GEO Series GSE27077. Arabidopsis thaliana. 6 samples. Type: Expression profiling by array.
Effect of auxin signaling on Pseudomonas syinrgae pv tomato DC3000 response
GEO Series GSE17500. Arabidopsis thaliana. 18 samples. Type: Expression profiling by array.
Interactions of ARF6 with PIF4, BZR1, and RGA integrate auxin signaling with environmental and other hormonal signals in Arabidopsis [ChIP-Seq]
GEO Series GSE51770. Arabidopsis thaliana. 2 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
Redox regulation of auxin and strigolactone signaling in the control of Arabidopsis thaliana root growth
GEO Series GSE36893. Arabidopsis thaliana. 8 samples. Type: Expression profiling by array.
Genome-wide identification and transcriptomic profiling of auxin concentration and signaling related genes in moso bamboo (Phyllostachys heterocycla)
GEO Series GSE100172. Phyllostachys edulis. 6 samples. Type: Expression profiling by high throughput sequencing.
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