Gene expression profiling of maize anther and pollen ontogeny
Ontology highlight
ABSTRACT:
ORGANISM(S): Zea mays
PROVIDER: GSE12579 | GEO | 2008/12/01
SECONDARY ACCESSION(S): PRJNA112629
REPOSITORIES: GEO
Similar Datasets
Project description:Global gene expression profiles of seven stages representing 29 days of anther development are analyzed using a 44K oligonucleotide array querying ~80% of maize protein-coding genes. Each anther stage expresses ~10,000 constitutive and ~10,000 or more transcripts restricted to one or a few stages. Keywords: anther development, maize 4 replicates of 7 samples (6 anther stages plus mature pollen) were hybridized to a 44K Agilent array according to the A-optimal design recommended by Kerr and Churchill for 7 samples.
2010-05-15 | E-GEOD-12579 | biostudies-arrayexpress
Project description:Transcriptomes from multiple pre-meiotic stages of wild type, mac1, and msca1 maize anthers were characterized by microarray hybridization. The goal was to characterize the developmental progression as the anther specifies five cell types and grows rapidly precedeing meiotic entry. The stages characterized were immature anther primordia (0.15 mm long in maize) containing just stem cells, through somatic and germinal cell fate specification (0.20 and 0.25 mm), mitotic proliferation (0.4 mm), and finally the birth of the middle layer and tapetum (0.7 mm). To obtain cell-type specific markers, at 0.7 mm we also compared whole anthers to collections of laser-microdissected anther cell types including the archesporial cells (pre-meiotic germinal cells), nutritive layers (middle layer and tapetum) and structural layers (endothecium and epidemis) of the anther lobe. keyword: anther development, maize, male-sterile
2013-05-01 | GSE43982 | GEO
Project description:Transcriptomes from multiple pre-meiotic stages of wild type, mac1, and msca1 maize anthers were characterized by microarray hybridization. The goal was to characterize the developmental progression as the anther specifies five cell types and grows rapidly precedeing meiotic entry. The stages characterized were immature anther primordia (0.15 mm long in maize) containing just stem cells, through somatic and germinal cell fate specification (0.20 and 0.25 mm), mitotic proliferation (0.4 mm), and finally the birth of the middle layer and tapetum (0.7 mm). To obtain cell-type specific markers, at 0.7 mm we also compared whole anthers to collections of laser-microdissected anther cell types including the archesporial cells (pre-meiotic germinal cells), nutritive layers (middle layer and tapetum) and structural layers (endothecium and epidemis) of the anther lobe. keyword: anther development, maize, male-sterile Three loop designs covered the early stages (up to 0.7 mm) with two replicates for each comparison. The first loop had 0.2 mm long anthers and compared wild type versus mac1 mutant versus msca1 mutant in a three vertex loop design. The second loop had four vertices and compared 0.15 mm WT anther primordia, 0.25 mm WT anthers, 0.4 mm WT anthers and finally 0.4 mm mac1 mutant anthers. The third had 0.7 mm anthers in a three vertex loop with the nutritive layers (middle layer and tapetum) at one vertex, the germinal pre-meiotic cells at another vertex, and whole anthers at a third vertex. The whole anther samples were also, separately and outside of the loop, compared in four replicates to the structural layers (endothecium and epidermis).
2013-05-01 | E-GEOD-43982 | biostudies-arrayexpress
Project description: Not available
| S-EPMC2646285 | biostudies-literature
Project description:In flowering plants, anther dehiscence and pollen release are essential for sexual reproduction. Anthers dehisce after cell wall degradation weakens stomium cell junctions in each anther locule, and desiccation creates mechanical forces that open the locules. Either effect or both together may break stomium cell junctions. The microRNA miR167 negatively regulates ARF6 and ARF8, which encode Auxin Response transcription Factors. Arabidopsis mARF6 or mARF8 plants with mutated miR167 target sites have defective anther dehiscence and ovule development. Null mir167a mutations recapitulated mARF6 and mARF8 anther and ovule phenotypes, indicating that MIR167a is the main miR167 precursor gene that delimits ARF6 and ARF8 expression in these organs. Anthers of mir167a or mARF6/8 plants overexpressed genes encoding cell wall loosening functions associated with cell expansion, and grew too large starting at flower stage 11. Experimental desiccation enabled dehiscence of miR167-deficient anthers, indicating competence to dehisce. Conversely, high humidity conditions delayed anther dehiscence in wild-type flowers. These results support a model in which miR167-mediated anther growth arrest permits anther dehiscence. Without miR167 regulation, excess anther growth delays dehiscence by prolonging desiccation.
2019-07-15 | GSE122436 | GEO
Project description:Single pollen precursors were isolated from maize anthers, covering 3 weeks of development from before meiosis through mature pollen. Starting material was staged by anther length and microscopy, and anther stages were densely sampled throughout pollen development. All samples were from an F1 hybrid between A188 and B73 inbred lines, and transcripts were associated with a specific parental allele when possible. In the "transcript_counts.csv" file, each sample is given 4 columns to separate the allele calls: '_g1' contains counts matching the B73 allele, '_g2' contains counts matching the A188 allele, 'ua' means unassigned (no SNPs were present in the transcript), and '_cf' means conflicting (the transcript had SNPs matching both alleles -- this is most likely sequencing error). Code to reproduce all figures from the main text of Nelms and Walbot (2022) can be found at https://doi.org/10.5281/zenodo.6620997
2021-10-26 | GSE175505 | GEO
Project description:Rice mature anther and mature pollen at anthesis stage from Dongin cultivar (Oryza sativa L. japonica) We collected the sample from our field using RNA Later to reveal differentially expressed genes.
2020-07-10 | E-MTAB-7974 | biostudies-arrayexpress
Project description:Agilent oligonucleotide arrays were used to profile gene expression in dissected maize anthers of 3 types of male-sterile plants and their fertile siblings at four stages of development: after anther initiation, at the rapid mitotic proliferation stage, pre-meiosis, and meiotic prophase I. The male-sterile mutants (ms23, msca, and mac1) lack a range of normal cell types resulting from a temporal progression of anther failure. By combining the data sets from the comparisons between individual sterile and fertile anthers, candidate genes predicted to play important roles during maize anther development were assigned to stages and to likely cell types. Keywords: anther development, maize, male sterility
2008-09-16 | GSE12756 | GEO
Project description:Gene expression throughout the reproductive process in rice (Oryza sativa) beginning with primordia development through pollination/fertilization to zygote formation was analyzed. We analyzed 25 stages/organs of rice reproductive development including early microsporogenesis stages with 57,381 probe sets, and identified around 26,000 expressed probe sets in each stage. Fine dissection of 25 reproductive stages/organs combined with detailed microarray profiling revealed dramatic, coordinated and finely tuned changes in gene expression. Decrease of expressed genes in the pollen maturation process was observed in a similar way with Arabidopsis and maize. An almost equal number of ab initio predicted genes and cloned genes appeared or disappeared coordinated with developmental stage progression. A large number of organ-/stage-specific genes were identified; notably 2,593 probe sets for developing anther, including 932 probe sets corresponding to ab initio predicted genes. Analysis of cell cycle-related genes revealed that several CDKs, cyclins and components of SCF E3 ubiquitin ligase complexes were expressed specifically in reproductive organs. Cell wall biosynthesis or degradation protein genes and transcription factor genes expressed specifically in reproductive stages were also newly identified. Rice genes homologous to reproduction-related genes in other plants showed expression profiles both consistent and inconsistent with their predicted functions. The rice reproductive expression atlas is likely to be the deepest and most comprehensive dataset available, indispensable for unraveling functions of many specific genes in plant reproductive processes that have not yet been thoroughly analyzed. Keywords: developmental stage comparison, tissue comparison, platform comparison Anther development of rice from hypodermal archesporial cells formation to tri-cellular mature pollens were divided into eight stages. Three or four biological replicates at each stage were analyzed with Affymetrix Rice Genome Array, and total number of samples in this series is 26.
2010-11-11 | E-GEOD-13988 | biostudies-arrayexpress
Project description:Background – In flowering plants, the anther is the site of male gametophyte development. Two major events in the development of the male germline are meiosis and the asymmetric division in the male gametophyte that gives rise to the vegetative and generative cells, and the following mitotic division in the generative cell that produces two sperm cells. Anther transcriptomes have been analyzed at progressive stages of development by using microarray and sequence by synthesis technologies to identify genes that regulate anther development. Here we have carried out a comprehensive analysis of rice anther transcriptomes at four distinct stages of development with a focus to identify regulatory components contributing to male meiosis and germline development. Further, these transcriptomes have been compared with transcriptomes of 10 stages of rice vegetative and seed development to identify genes that express specifically during anther development. Results - To understand the molecular processes that lead to male gametophyte development, transcriptome profiling of four stages of anther development in rice [pre-meiotic (PMA), meiotic (MA), anthers at single-celled (SCP) and tri-nucleate pollen (TPA)] was conducted. Around 22,000 genes were found to be expressed in at least one of the anther developmental stages, with the highest number in MA (18,090) and lowest (15,465) in TPA. Comparison of these transcriptome profiles to an in-house generated microarray-based transcriptomics database comprising of 10 stages/tissues of vegetative as well as reproductive development in rice resulted in the identification of 1,000 genes that are specifically expressed in anther stages. Of them the expression of 453 genes was found to be specific to TPA, whereas 78 and 184 genes were expressed specifically in MA and SCP. Gene ontology and pathway analysis of specifically expressed genes revealed that transcription factors and protein folding, sorting and degradation pathway genes dominated in MA, whereas in TPA, those coding for cell structure and signal transduction components were in abundance. Interestingly, about 50% of the genes with anther-specific expression have not been annotated so far. Conclusions - These data not only provide the transcriptome constituents of four landmark stages of anther development but also identify genes that express exclusively in these stages and therefore may contribute to specific aspects of anther and/or male gametophyte development in rice. Moreover, these gene sets assist in building a deeper understanding of underlying regulatory networks and in selecting candidates for gene function validation.
2011-06-10 | GSE27726 | GEO