Ontology highlight
ABSTRACT:
PROVIDER: PRJNA657757 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12466200_1.fastq.gz | Fastqsanger.gz | |||
| SRR12466200_2.fastq.gz | Fastqsanger.gz | |||
| SRR12466201_1.fastq.gz | Fastqsanger.gz | |||
| SRR12466201_2.fastq.gz | Fastqsanger.gz | |||
| SRR12466202_1.fastq.gz | Fastqsanger.gz |
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Project description:The expression analysis had two goals: (1) look at relative transcription within mature pollen grains (2) compare expression in the stigma during pollination with either compatible or in-compatible pollen. Two pairwise comparisons, (i) unpollinated stigma vs. stigma pollinated with compatible pollen, and (ii) unpollinated stigma vs stigma pollinated with incompatible pollen. The genotype where stigma samples were harvested from is F1-30, and this is also the pollen source during an incompatible pollination reaction. The compatible pollen source is the variety Foxtrot (heterogeneous populations).
2015-10-26 | E-MTAB-3760 | biostudies-arrayexpress
Project description:Triticeae crops are major contributors to global food production and ensuring their capacity to reproduce and generate seeds is critical. However, despite their importance our knowledge of the proteins underlying Triticeae reproduction is severely lacking and this is not only true of pollen and stigma development, but also of their pivotal interaction. When the pollen grain and stigma are brought together they have each accumulated the proteins required for their intended meeting and accordingly studying their mature proteomes is bound to reveal proteins involved in their diverse and complex interactions. Using triticale as a Triticeae representative, gel-free shotgun proteomics was used to identify 11533 and 2977 mature stigma and pollen proteins respectively. These datasets, by far the largest to date, provide unprecedented insights into the proteins participating in Triticeae pollen and stigma development and interactions. The study of the Triticeae stigma has been particularly neglected and to begin filling this knowledge gap, a developmental iTRAQ analysis was performed revealing 647 proteins displaying differential abundance as the stigma matures in preparation for pollination. An in-depth comparison to an equivalent Brassicaceae analysis divulged both conservation and diversification in the makeup and function of proteins involved in the pollen and stigma encounter.
2023-03-08 | PXD038905 | Pride
Project description:Successful pollination brings together the mature pollen grain and stigma papilla to initiate an intricate series of molecular processes meant to eventually enable sperm cell delivery for fertilization and reproduction. At maturity, the pollen and stigma cells have acquired proteomes comprising the primary molecular effectors required upon their meeting. In Brassica species, knowledge of the roles and global composition of these proteomes is largely lacking. To address this gap, gel-free shotgun proteomics was performed on the mature pollen and stigma of Brassica carinata, a representative of the Brassica family and its many crop species (e.g. B. napus, B. oleracea, B. rapa), which holds considerable potential as a bio-industrial crop. 5608 and 7703 B. carinata mature pollen and stigma proteins were identified, respectively. The pollen and stigma proteomes were found to reflect not only their many common functional and developmental objectives, but also important differences underlying their cellular specialization. Isobaric tag for relative and absolute quantification (iTRAQ) was exploited in the first analysis of a developing Brassicaceae stigma, and uncovered 251 B. carinata proteins that were differentially abundant during stigma maturation, providing insight into proteins involved in the initial phases of pollination.
2021-03-13 | PXD017953 | Pride
Project description:Sexual reproduction in flowering plants involves intimate interactions between the growing pollen tube and the female reproductive structure. These interactions start immediately after pollen landing on the stigma and continue during the pollen tube journey through the style and the ovary. Thus, well before fertilization, genes in the gynoecium are affected by the growing pollen tubes. Genes activated at a distance in the ovary before pollen tubes arrival represent one class of such genes. Using a global transcriptomic approach, expression profiles obtained from compatible (SC), incompatible (SI), semi-compatible (SeC) and interspecific (IS) pollinations revealed that these pollinations are perceived differently from a distance in the ovary. As the pollen tubes grew along the style, more and more genes became specific for each pollination type, although even early on when no difference could be observed in pollen tube growth rates, each pollination type already displayed its specific signature. Wounding experiments as well as methyl jasmonate treatment were also conducted to determine if transmitting tissue cell death caused by pollen tube growth in the style could also activate gene expression at distance in the ovary. Our data suggest that pollen tube growth in the style is at least partially perceived as a wounding aggression, and that a SI pollination is more akin to a wound response than the other pollination type tested, suggesting similarities in the signaling pathways controlling pollen recognition and stress responses. More importantly, our transcriptomic analysis reveals a highly specific recognition of various pollination types that is relayed from a distance to the ovary ahead of fertilization.
2010-05-26 | GSE21957 | GEO
Project description:In angiosperms, stigma provides initial nutrients and guidance cues for pollen grain germination and tube growth. However, little is known about genes that regulate these processes in rice. Here we generate rice stigma-specific gene expression profiles through comparing genome-wide expression patterns of hand dissected unpollinated stigma at anthesis with seven tissues including seedling shoot, seedling root, mature anther, ovary at anthesis, seeds of five days after pollination, 10-day-old embryo, 10-day-old endosperm as well as suspension cultured cells by using 57K Affymetrix rice whole genome array. In total, we identified 665 probe sets (550 genes) to be expressed specifically or predominantly in the stigma papillar cells of rice. Real-Time quantitative RT-PCR analysis of 34 selected genes confirmed their stigma-specific expression. The expression of five selected genes was further validated by RNA in situ hybridization. Gene annotation shows that several auxin-signaling components, transporters and stress-related genes are significantly overrepresented in the rice stigma gene set. We also found that genes involved in cell wall metabolism and cellular communication appear to be conserved in the stigma between rice and Arabidopsis. Our results indicate that the stigmas appear to have conserved and novel molecular functions between rice and Arabidopsis. Keywords: rice (Oryza sativa L.), pollination and fertilization, stigma, molecular functions, signaling£¬microarray, stress response
2007-06-30 | GSE7951 | GEO
Project description:Sexual reproduction in flowering plants involves intimate interactions between the growing pollen tube and the female reproductive structure. These interactions start immediately after pollen landing on the stigma and continue during the pollen tube journey through the style and the ovary. Thus, well before fertilization, genes in the gynoecium are affected by the growing pollen tubes. Genes activated at a distance in the ovary before pollen tubes arrival represent one class of such genes. Using a global transcriptomic approach, expression profiles obtained from compatible (SC), incompatible (SI), semi-compatible (SeC) and interspecific (IS) pollinations revealed that these pollinations are perceived differently from a distance in the ovary. As the pollen tubes grew along the style, more and more genes became specific for each pollination type, although even early on when no difference could be observed in pollen tube growth rates, each pollination type already displayed its specific signature. Wounding experiments as well as methyl jasmonate treatment were also conducted to determine if transmitting tissue cell death caused by pollen tube growth in the style could also activate gene expression at distance in the ovary. Our data suggest that pollen tube growth in the style is at least partially perceived as a wounding aggression, and that a SI pollination is more akin to a wound response than the other pollination type tested, suggesting similarities in the signaling pathways controlling pollen recognition and stress responses. More importantly, our transcriptomic analysis reveals a highly specific recognition of various pollination types that is relayed from a distance to the ovary ahead of fertilization. To determine on a more global scale if interorgan communication during pollen-pistil interactions is a widespread phenomenon and does not only involve few specialized genes, we used a 7.7K cDNA microarray comprising ~6500 ovule-derived unigenes in duplicata from Solanum chacoense, a self-incompatible wild potato species (Germain et al., 2005), to conduct gene expression analyses through cDNA microarray hybridizations. Profiles obtained from compatible (SC), incompatible (SI), semi-compatible (SeC) and interspecific (IS) pollinations as well as from wounding treatments were all analyzed using the same minimal expression level critera (p < 0.05, fold change ≥± 1.5). Four independent biological replicates were produced from each time points. Ovules were collected at 6, 24 and 48 hours after each treatment and used for RNA extraction and probe preparation . compatible (SC), incompatible (SI), semi-compatible (SeC) and interspecific (IS) pollinations as well as from wounding treatments mRNA preparations were individually hybridized against unpollinated ovule mRNAs . All data was substracted from the touch control. Althought Methanol treated ovules RNA were hybridized against unpollinated ovule mRNAs from plant in closed chamber. To estimate reproducibility and to produce control data for statistical analysis, a large number of unfertilized ovules were isolated and separated between seven independent control groups. RNA from randomly selected pairs of control was hybridized on six microarrays.
2010-05-26 | E-GEOD-21957 | biostudies-arrayexpress
Project description:In angiosperms, stigma provides initial nutrients and guidance cues for pollen grain germination and tube growth. However, little is known about genes that regulate these processes in rice. Here we generate rice stigma-specific gene expression profiles through comparing genome-wide expression patterns of hand dissected unpollinated stigma at anthesis with seven tissues including seedling shoot, seedling root, mature anther, ovary at anthesis, seeds of five days after pollination, 10-day-old embryo, 10-day-old endosperm as well as suspension cultured cells by using 57K Affymetrix rice whole genome array. In total, we identified 665 probe sets (550 genes) to be expressed specifically or predominantly in the stigma papillar cells of rice. Real-Time quantitative RT-PCR analysis of 34 selected genes confirmed their stigma-specific expression. The expression of five selected genes was further validated by RNA in situ hybridization. Gene annotation shows that several auxin-signaling components, transporters and stress-related genes are significantly overrepresented in the rice stigma gene set. We also found that genes involved in cell wall metabolism and cellular communication appear to be conserved in the stigma between rice and Arabidopsis. Our results indicate that the stigmas appear to have conserved and novel molecular functions between rice and Arabidopsis. Experiment Overall Design: We generate rice stigma-specific gene expression profiles through comparing genome-wide expression patterns of hand dissected unpollinated stigma at anthesis with seven tissues including seedling shoot, seedling root, mature anther, ovary at anthesis, seeds of five days after pollination, 10-day-old embryo, 10-day-old endosperm as well as suspension cultured cells by using 57K Affymetrix rice whole genome array.
2008-11-08 | E-GEOD-7951 | biostudies-arrayexpress
Project description:Despite their importance, there remains a paucity of large scale expression-based studies of reproductive development in the species belonging to the Triticeae. As a first step to address this deficiency, a gene expression atlas of triticale reproductive development was generated using the 55K Affymetrix GeneChip® Wheat Genome Array. The global transcriptional profiles of the anther/pollen, ovary and stigma were analyzed at concurrent developmental stages and co-regulated as well as preferentially expressed genes were identified. Data analysis revealed both novel and conserved regulatory factors underlying Triticeae floral development and function. Triticale reproductive tissues (anther, ovary, stigma) were collected at 4 successive stages using pollen development as a developmental reference: tetrad (TET), uninucleate microspore (UNM), bi-cellular pollen (BCP), and tri-cellular pollen (TCP). Mature pollen grains (MPG) were also collected. Three biological replicates were analyzed for each tissue using the 55K Affymetrix GeneChip® Wheat Genome Array.
2012-11-01 | E-GEOD-41984 | biostudies-arrayexpress
Project description:Microarray experiments were used to build a profile of candidate stigma genes that facilitate early pollination events. Of over 24,000 genes probed, we identified 11,403 genes expressed in stigma tissue, 317 of these that are stigma specific (not expressed in control tissues). Keywords: Comparative hybridization
2005-08-06 | GSE3056 | GEO
Project description:In many plant species, flower stigma secretions are important in early stages of sexual reproduction. Previous chemical analysis and proteomic characterization of these exudates provided insights into their biological function. Nevertheless, the presence of nucleic acids in the stigma exudates has not been previously reported. Here we studied the stigma exudates of Pyrus communis, Pyrus pyrifolia and Pyrus syriaca, and showed them to harbor extracellular RNAs of various sizes. RNA sequencing revealed, for the first time, the presence of known Rosaceae mature micro-RNAs (miRs), also abundant in the stigma source tissue. Predicted targets of the exudate miRs in the Arabidopsis thaliana genome include genes involved in various biological processes. Several of these genes are pollen transcribed, suggesting possible involvement of exudate miRs in transcriptional regulation of the pollen. Moreover, extracellular miRs can potentially act across kingdoms and target genes of stigma interacting organisms/microorganisms, thus opening novel applicative avenues in HortSciences.
2023-11-15 | GSE225720 | GEO