Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Transcription profiling of developing pea cotyledons over-expressing VfAAP1

ABSTRACT: Nitrogen application to legume seeds regulates seed metabolism and composition. In order to improve nitrogen flux into the embryo, the Vicia faba amino acid permease VfAAP1 (Miranda et al. Amino acid permeases in developing seeds of Vicia faba L.: expression precedes storage protein synthesis and is regulated by amino acid supply. Plant J 2001 28: 61-72) was expressed in pea under control of the seed-specific LeB4 promotor (Bäumlein et al. Cis-analysis of a seed protein gene promoter: the conservative RY repeat CATGCATG within legumin box is essential for tissue-specific expression of a legumin gene. Plant J 1992 2: 233-239). Several transgenic lines have been generated. Mature seeds of the homozygous marker gene-free line AAP14/10 showed an increase in amino acid supply, seed nitrogen and protein content due to higher globulin fraction. The effect of VfAAP1 was tested under field conditions in two growing periods, 2005 and 2006, and the data could be confirmed. Over-expression of VfAAP1 interferes with storage protein metabolism and alters fluxes of nitrogen during seed growth. The influence of VfAAP1 on altered gene expression in developing cotyledons was analysed using a 6k-Oligo-microarray. Four developmental stages (18, 22, 26 and 30 DAP) from seeds, grown 2006, of the transgenic line AAP14/10 were hybridized against wildtype control.

ORGANISM(S): Pisum sativum

SUBMITTER: Kathleen Weigelt

PROVIDER: E-MEXP-1557 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Similar Datasets

RNAi knock down of ADP-glucose pyrophosphorylase (AGP) in Pisum sativum developing cotyledons

Project description:During seed growth, sugar and nitrogen compounds confer regulatory control on storage activities. Thus, seed storage production could be regulated by the supply of nutrients. In order to improve nitrogen flux into the embryo, transgenic pea lines were created where ADP-glucose pyrophosphorylase (AGP) from Pisum sativum has been repressed by RNAi approach in the seeds under control of the seed-specific LeB4 promotor (Bäumlein et al. Cis-analysis of a seed protein gene promoter: the conservative RY repeat CATGCATG within legumin box is essential for tissue-specific expression of a legumin gene. Plant J 1992 2: 233-239). The plastidial enzyme AGP catalyzes the reaction of glucose-1-phosphate and ATP to pyrophosphate and ADP-glucose, which is the substrate for starch synthase. The AGP activity and transcript levels were strongly decreased in three independent transgenic lines. Repression of AGP results in a wrinkled seed phenotype obviously due to transient accumulation of free sugars during maturation. Mature seeds have reduced starch content whereas the protein concentration is higher due to increased fractions of albumins and globulins. Repression of AGP interferes with storage protein metabolism and alters fluxes of nitrogen during seed growth. The influence of decreased AGP on altered gene expression in developing cotyledons was analysed using a 6k-Oligo-microarray. Ps6kOLI1 microarray hybridization were performed using three independent biological replicates of four developmental stages (20, 25, 30 and 35 DAP) from seeds of the transgenic line iAGP-3.

2008-09-01 | E-MEXP-1749 | biostudies-arrayexpress

Transcription profiling of developing wild type pea seeds and those expressing anti-ABA antibodies

Project description:ABA regulates in plants a wide range of developmental events, mediates responses to environmental stress and is necessary to proceed through seed maturation and to acquire desiccation tolerance and dormancy. Immuno-modulation is a suitable means to study ABA functions during seed maturation. Anti-ABA single chain antibody was expressed in pea seed driving LeB4-promoter (Saalbach et al., High-level expression of a single chain Fv fragment (scFv) antibody in transgenic pea seeds J. Plant Physiol. 2001 158: 529-533), which produced only a weak phenotype with slightly decreased seed weight, globulin/albumin and total nitrogen content (aABA line 16 cultivar Erbi). In another approach with a stronger, improved USP-promoter used to express the anti-ABA antibody in pea seeds a different phenotype emerged (aABA line 7, cultivar Eifel). In this line individual seed weight increased by 20 to 30% together with higher globulin and albumin content. To dissect the aABA phenotype at the molecular level, a search for genes with differential expression patterns in transgenic plant versus wild type seeds has been performed using 6k-oligo microarray analysis. cDNA probes were prepared from RNA isolated from embryo of developing seeds of wild type (12, 18, and 22 DAP) and transgenic aABA plants (12, 18, and 22 DAP), which correspond to the transition phase of seed development, and 6k-oligo microarray.

2008-07-31 | E-MEXP-1555 | biostudies-arrayexpress

MULocDeep: An Interpretable Deep Learning Model for Protein Localization Prediction with Sub-organelle Resolution

Project description:Prediction of protein localization plays an important role in understanding protein function and mechanism. A deep learning-based localization prediction tool (“MULocDeep”) assessing each amino acid’s contribution to the localization process provides insights into the mechanism of protein sorting and localization motifs. A dataset with 45 sub-organellar localization annotations under 10 major sub-cellular compartments was produced and the tool was tested on an independent dataset of mitochondrial proteins that were extracted from Arabidopsis thaliana cell cultures, Solanum tuberosum tubers, and Vicia faba roots, and analyzed by shotgun mass spectrometry.

2022-02-15 | PXD019987 | Pride

Profiling of transcripts in developing seeds of common bean (Phaseolus vulgaris) lines differing in major storage proteins

Project description:To understand the molecular basis for differences of common bean wild-type and mutant in sulphur amino acid content, transcripts were profiled at four developmental stages of seeds from wild-type SARC1 and major seed storage protein-deficient line SMARC1N-PN1 using a CustomArray 90K array. Microarray data confirmed that transcripts of storage and sulphur-rich proteins and sulphur-metabolism related genes were differentially expressed between the lines. The common bean (Phaseolus vulgaris) mutant line, SMARC1N-PN1 and its wild type, SARC1 used in the microarray experiment were grown in the field in London, ON, in 2009. Four developmental stages of seeds, based on fresh seed weight, were harvested. The stages of seeds used are Stage IV M-bM-^@M-^S cotyledon, 25 mg seed weight; Stage V M-bM-^@M-^S cotyledon, 50 mg seed weight; Stage VI M-bM-^@M-^S maturation, 150 mg seed weight, corresponding to the most active phase of reserve accumulation; and Stage VIII M-bM-^@M-^S maturation, 380 mg seed weight, corresponding to the onset of desiccation, were harvested for total RNA extraction. Four biological replicates for Stage IV and V and 3 biological replicates for Stage VI and VIII.

2012-11-06 | E-GEOD-34233 | biostudies-arrayexpress

Metabolic changes in seeds of malting barley produced under drought or elevated temperature

Project description:Plants of a “Hana-type” landrace (B1) were taller, flowered earlier and produced heavier, larger and more vigorous seeds that resisted ageing longer compared to a semi-dwarf breeding line (B2). Drought significantly reduced seed yield in both genotypes, and elevated temperature reduced seed size. Genotype B2 showed partial thermodormancy that was alleviated by drought and elevated temperature, in line with lower abundance of the TF ABI5, a key regulator of seed dormancy and vigour. Metabolite profiling revealed clear differences between the embryos of B1 and B2. Drought, but not elevated temperature, affected the metabolism of amino acids, organic acids, osmolytes and nitrogen assimilation, in the seeds of both genotypes.

2022-08-29 | ST002272 | MetabolomicsWorkbench

Expression data from maturing soybean seeds

Project description:Environmental stresses such as drought, salinity and both high and low temperature are frequently faced by crops all over the world and can be considered major limiting factors for plant geographical distribution and productivity. Breeding has allowed creation of crops more adapted to some of the adverse environmental conditions and to overcome the geographical limitation without major consequences to productivity. However, due to the climate changes observed in the last few decades, some agricultural areas have experienced the âgreen seed problemâ characterized by chlorophyll retention in mature seeds. This is problematic in oil seed crops such as soybean and canola since it is related to lower seed and oil quality, resulting in serious financial losses. Besides the environmental factors, there are also genetic components controlling the susceptibility of different cultivars to green seed production. Understanding the molecular mechanisms controlling chlorophyll retention in seeds is crucial to allow advanced molecular breeding techniques and genetic engineering as a way to increase tolerance to this growing problem. We have used maturing soybean seeds of the cultivar MG/BR 46, harvested in R6, R7 and R8, produced under non-stressed and stressed environmental conditions, to understand he molecular basis of chlorophyll degradation and, consequently, its retention during soybean seed maturation. Soybean seeds were produced under stressed and non-stressed conditions and harvested in 3 different stages of maturation: R6 non-stressed, R7 non-stressed, R8 non-stressed, R6 stressed, R7 stressed, R8 stressed.

2016-01-21 | E-GEOD-70999 | biostudies-arrayexpress

Transcriptomic profiling of apple seeds

Project description:Comparison of seed of two different types of developing fruits in apple: central and lateral. Our objective is to find transcriptomic signatures that allow to explain the physiological drop of young lateral fruitlets Apple seeds transcriptomes were generated by deep sequencing by triplicate from seeds collected from central and lateral fruitlets at 20 days after petal fall (DAPF)

2014-11-21 | E-GEOD-62415 | biostudies-arrayexpress

Large-Scale Gene Expression Profiling of Developing Soybean Seeds of Evans

Project description:Developing Evans seeds at 25, 30, 40, 45 and 50 days after flowering (DAF) were harvested and analyzed to gain insights as to the biochemical program that determines soybean seed development. We used microarrays to detail the global programme of gene expression underlying seed development and identified distinct classes of genes with changed expression during this process. Sampled developing Evans seeds at 25, 30, 40, 45 and 50 days after flowering (5 time points), with two replicates each.

2014-09-11 | E-GEOD-61350 | biostudies-arrayexpress

In-depth investigation of low-abundant proteins in matured and filling stages seeds of Glycine max by a combination of protamine sulfate precipitation and TMT-based quantitative proteomic analysis

Project description:The presence of seed storage proteins is a major bottleneck in soybean seed proteome analysis despite the significant technical advancements in mass spectrometry and data analysis software. Our previous studies have shown that effective ways to improve the detection of low-abundance proteins in soybean seeds using protamine sulfate (PS) with 2-DGE analysis. Besides, verification of the PS precipitation method revealed broad application to other leguminous plants like pea, broad bean, and peanut. Nonetheless, it is difficult to overcome the poor reproducibility and limitation of the dynamic range of identification during 2-DGE analysis. Thus, to elucidate the suitability and efficacy of protamine sulfate precipitation method for shotgun proteome approach, we performed TMT-based quantitative analysis using matured and filling stages seeds by application of two-way pre-fractionation using PS and chromatographic methods. Interestingly, this approach led to the identification of 2,200 and 924 differential proteins in the matured and filling stage of soybean seeds, respectively. These results revealed enrichment of various proteins related to major metabolism in soybean seeds including amino acid, major carbohydrate, lipid metabolism, and among others. Taken together, results provided the new insight into current complexity and limitation of soybean seed proteomics through two-way pre-fractionation combined with TMT-based quantitative analysis.

2020-06-28 | PXD019155 | Pride

Medicago truncatula late seed maturation

Project description:Seven developmental stages of Medicago truncatula A17 during seed maturation (from 24 DAP to dry seeds)

2013-07-23 | E-MEXP-3719 | biostudies-arrayexpress