RRBS and RNA-seq profiling of maize shoot and tassel primordium
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ABSTRACT:
ORGANISM(S): Zea mays
PROVIDER: GSE84490 | GEO | 2017/08/07
SECONDARY ACCESSION(S): PRJNA329573
REPOSITORIES: GEO
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Project description:RRBS and RNA-seq profiling of maize shoot and tassel primordium
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Project description:Low phosphate concentrations are frequently a constraint for maize growth and development, and therefore, enormous quantities of phosphate fertilizer are expended in maize cultivation, which increases the cost of planting. Low phosphate stress not only increases root biomass but can also cause significant changes in root morphology. Low phosphate availability has been found to favor lateral root growth over primary root growth by dramatically reducing primary root length and increasing lateral root elongation and lateral root density in Arabdopsis. While in our assay when inbred line Q319 subjected to phosphate starvation, The numbers of lateral roots and lateral root primordia were decreased after 6 days of culture in a low phosphate solution (LP) compared to plants grown under normal conditions (sufficient phosphate, SP), and these differences were increased associated with the stress caused by phosphate starvation. However, the growth of primary roots appeared not to be sensitive to low phosphate levels. This is very different to Arabidopsis. To elucidate how low phosphate levels regulate root modifications, especially lateral root development, a transcriptomic analysis of the 1.0-1.5 cm lateral root primordium zone (LRZ) of maize Q319 treated after 2 and 8 days by low phosphate was completed respectively. The present work utilized an Arizona Maize Oligonucleotide array 46K version slides, which contained 46,000 maize 70-mer oligonucleotides designated by TIGR ID, and the sequence information is available at the website of the Maize Oligonucleotide Array Project as the search item representing the >30,000 identifiable unique maize genes (details at http://www.maizearray.org). Keywords: low phosphate, Lateral Root Primordium Zone, maize Two-condition experiment, low phosphate treated lateral root primordium zone of maize root vs. normal cultrued lateral root primordium zone. Biological replicates: 9 control, 9 treated, independently grown and harvested. One replicate per array.
2012-03-09 | E-GEOD-36368 | biostudies-arrayexpress
Project description:Purpose: In higher plants, perennialism is achieved through axillary buds and side-shoots that stay vegetative. This work aims to analyze the pattern of axillary bud (AB) formation in the perennial model plant Arabis alpina and to study the role of LATERAL SUPPRESSOR (AaLAS) gene in this process. Methods: This study combines stereomicroscopic analysis with RNA sequencing to monitor how patterns of AB formation and gene expression correlate. The role of AaLAS was studied using an RNAi approach. Results: During vegetative development, ABs initiate at a distance to the SAM, whereas after induction of flowering ABs initiate adjacent to the SAM. Dormant buds are established before onset of vernalization. Transcript profiles of ABs initiated at a distance were different from that of the SAM, whereas transcript patterns of buds initiated in close proximity were similar to the corresponding SAM. Knock-down of AaLAS leads to loss of both dormant buds and vegetative side-shoots, strongly compromising perennial life style. Conclusions: AB formation is regulated differently during vegetative and reproductive development. New meristems that show gene expression profiles different from the SAM are established at a distance to the SAM. AaLAS plays an essential role in perennial life cycle modulating the establishment of dormant buds and vegetative side-shoots.
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Project description:Despite their importance, there remains to be few large scale expression-based studies of tissue-specific expression information in the species belonging to the Triticeae. We used the 55K Affymetrix GeneChip® Wheat Genome Array to generate a gene expression atlas of triticale tissues. The global transcriptional profiles of seed tissues (embryo, endosperm, crease, pericarp and epiderm) and vegetative tissues (root, coleoptile, stem and leaf) were analyzed and co-regulated as well as preferentially expressed genes were identified. Data analysis revealed both novel and conserved regulatory factors underlying Triticeae tissue development and function. Triticale seed (embryo, endosperm, crease, pericarp and epiderm) and vegetative tissues (root, coleoptile, leaf and stem) were collected and analyzed using the 55K Affymetrix Wheat Genome array. All seed tissues were collected at the soft dough stage of seed development. Vegetative tissues were collected at multiple stages of development. Root and coleoptile tissues were collected at early development (Zadoks' stage 7), and leaf tissue was collected at five successive stages ranging from seedling to late senescence and stem tissue was collected at four successive stages stages ranging from initial tillering to early senescence. Between two to five biological replicates for each tissue were analyzed.
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Project description:The posterior lateral line system in zebrafish involves cell migration, proliferation and differentiation into mechanosensory cells. During development, a group of cranial placodal cells delaminate and become a coherent, migratory primordium that traverses the length of the fish to form this sensory system. As they migrate, the primordium deposits groups of cells called neuromasts, the specialized organs that contain the mechanosensory hair cells. The lateral line hair cells of fish are related to inner ear hair cells; therefore the primordium provides both a model for studying collective directional cell migration and the differentiation of sensory cells from multipotent progenitor cells. Through the combination of transgenic fish, Fluorescence Activated Cell Sorting and microarray analysis we identified a repertoire of key genes expressed in the migrating primordium and in differentiated neuromasts. We validated the specific expression in the primordium of a subset of the identified sequences by quantitative RT-PCR, and by in situ hybridization. We also show that interfering with the function of f11r and cd9b induces defects in its migratory behavior. Finally, pathway construction revealed functional relationships among the genes enriched in the migrating cell population. Our results demonstrate that this is a robust approach to globally analyze specific expression and we predict that many of the genes identified in this study will show critical functions in developmental and tumor progression process relating to posterior lateral line development.
2010-12-15 | GSE25617 | GEO
Project description:Low phosphate concentrations are frequently a constraint for maize growth and development, and therefore, enormous quantities of phosphate fertilizer are expended in maize cultivation, which increases the cost of planting. Low phosphate stress not only increases root biomass but can also cause significant changes in root morphology. Low phosphate availability has been found to favor lateral root growth over primary root growth by dramatically reducing primary root length and increasing lateral root elongation and lateral root density in Arabdopsis. While in our assay when inbred line Q319 subjected to phosphate starvation, The numbers of lateral roots and lateral root primordia were decreased after 6 days of culture in a low phosphate solution (LP) compared to plants grown under normal conditions (sufficient phosphate, SP), and these differences were increased associated with the stress caused by phosphate starvation. However, the growth of primary roots appeared not to be sensitive to low phosphate levels. This is very different to Arabidopsis. To elucidate how low phosphate levels regulate root modifications, especially lateral root development, a transcriptomic analysis of the 1.0-1.5 cm lateral root primordium zone (LRZ) of maize Q319 treated after 2 and 8 days by low phosphate was completed respectively. The present work utilized an Arizona Maize Oligonucleotide array 46K version slides, which contained 46,000 maize 70-mer oligonucleotides designated by TIGR ID, and the sequence information is available at the website of the Maize Oligonucleotide Array Project as the search item representing the >30,000 identifiable unique maize genes (details at http://www.maizearray.org). Keywords: low phosphate, Lateral Root Primordium Zone, maize
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Project description:Differential expression profiling of light induction and primordium differentiation was established by integrating ATAC-seq (assay for transposase accessible chromatin with high through put sequencing) and RNA-seq technology. Key genes in light induced the primordium formation of S. latifolia were identified by bioinformatics methods.
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