Browse
Submit Data
Databases
API
Help

Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

13 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Hypoxia triggers meiotic fate acquisition in maize

ABSTRACT: Evidence from confocal microscopic reconstruction of maize anther development in fertile, mac1 (excess germ cells) and msca1 (no germ cells) flowers indicates that the male germ line is multiclonal and uses the MAC1 protein to organize the somatic niche. Furthermore, we identified redox status as a determinant of germ cell fate, defining a mechanism distinct from the animal germ cell lineage. Decreasing oxygen or H2O2 increases germ cell numbers, stimulates superficial germ cell formation, and rescues germinal differentiation in msca1 flowers. Conversly, oxidizing environments inhibit germ cell specification and cause ectopic differentiation in deeper tissues. We propose that hypoxia, arising naturally within growing anther tissue, acts as a positional cue to set germ cell fate. key words: anther development, maize, male-sterile Two replicates of laser microdissected pre-meiotic cells were compared to two replicates of whole anthers, which contains pre-meiotic cells and somatic cells, from the same developmental stage and individual wild type plants. In another experiment, laser microdissected pre-meiotic cells from wild type (mac1-heterozygous) anthers were compared to laser microdissected pre-meiotic cells from mac1 (mutant) anthers.

ORGANISM(S): Zea mays

SUBMITTER: Timothy Kelliher

PROVIDER: E-GEOD-39101 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Similar Datasets

Transcriptome analysis of multiple pre-meiotic anther stages and laser microdissected cell types in maize

2013-05-01 | GSE43982 | GEO

Transcriptome analysis of multiple pre-meiotic anther stages and laser microdissected cell types in maize

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

Hypoxia triggers meiotic fate acquisition in maize

Project description:Evidence from confocal microscopic reconstruction of maize anther development in fertile, mac1 (excess germ cells) and msca1 (no germ cells) flowers indicates that the male germ line is multiclonal and uses the MAC1 protein to organize the somatic niche. Furthermore, we identified redox status as a determinant of germ cell fate, defining a mechanism distinct from the animal germ cell lineage. Decreasing oxygen or H2O2 increases germ cell numbers, stimulates superficial germ cell formation, and rescues germinal differentiation in msca1 flowers. Conversly, oxidizing environments inhibit germ cell specification and cause ectopic differentiation in deeper tissues. We propose that hypoxia, arising naturally within growing anther tissue, acts as a positional cue to set germ cell fate. key words: anther development, maize, male-sterile

2012-07-05 | GSE39101 | GEO

Transcriptome profiling of maize anthers using genetic ablation to analyze pre-meiotic and tapetal cell types

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

Transcriptome profiling of maize anthers using genetic ablation to analyze pre-meiotic and tapetal cell types

2008-09-16 | E-GEOD-12756 | biostudies-arrayexpress

Defining the developmental program leading to meiosis in maize

Project description:We isolated pre-meiotic and early meiotic cells from 24 maize anthers, covering a week of development from the day after archesporial (AR) cell specification to the early zygotene stage of meiotic prophase I. Starting material was staged by anther length, and anther stages were densely sampled from throughout this period. High quality reads were obtained from 144 cells.

2018-10-10 | GSE121039 | GEO

The proteome of developing barley anthers during meiotic prophase I

Project description:In the current project, we aimed to discover how the barley anther proteome changes, both quantitatively and qualitatively, during meiotic prophase I when the important process of homologous recombination is taking place. Taking advantage of a recently published barley anther transcriptomic dataset (BAnTr) and a newly developed sensitive mass spectrometry-based approach to analyse barley anther proteome, we have conducted high-resolution mass spectrometry analysis of barley anthers, collected at 6 time points and representing their development from pre-meiosis to metaphase. Each time point was carefully staged using immunocytology. We identified >6400 proteins, including 82 known and putative meiotic proteins, and were able to quantify dynamic variation in the proteome during different stages of barley anther development.

2022-04-04 | PXD026200 | Pride

Identification of anther expressing genes in cotton (Gossypium hirsutum)

Project description:This study was initiated with the objective of identifying the anther/tapetum specific promoters from cotton floral buds. Cotton is an important commercial crop. Hybrid cotton varieties are developed to obtain improved yield and fiber quality. Most of the hybrid seed production in cotton is carried out by hand emasculation, which requires large amount of manpower, resulting in high cost of hybrid seed. We are developing barnase-barstar based male sterility system, which would be a better alternative for hybrid development. The tapetum specific promoters are main requirement for such a system. The study was thus carried out to identify genes expressed in the anthers. Cotton bud sizes were correlated with tapetum development. RNA was isolated from following tissues: • Anther tissues from buds at pre-meiotic stage of development (Tapetum absent) • Buds without anther tissues at pre-meiotic stage of development • Anther tissues from buds during meiosis (Tapetum present) • Buds without anther tissues during meiosis • Anther tissues from buds at post-meiotic stage of development (Tapetum degenerated) • Buds without anther tissues at post-meiotic stage of development • Leaf tissues • Seedling 5 days after germination Biotin labeled cRNA was hybridized on Affymertix cotton Genechip Genome array following Affymetrix protocols. Three biological replicates were maintained.

2013-10-31 | E-GEOD-51779 | biostudies-arrayexpress

miR167 limits anther growth to potentiate anther dehiscence

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

24-nt phasiRNAs move from tapetal to meiotic cells in maize anthers

Project description:In maize, 24-nt phased, secondary small interfering RNAs (phasiRNAs) are abundant in meiotic stage anthers, but their distribution and functions are not precisely known. Using laser capture microdissection (LCM), we analyzed tapetal cells, meiocytes, and other somatic cells at several stages of anther development to establish the timing of 24-PHAS precursor transcripts and the 24-nt phasiRNA products. This dataset includes 24-nt phasiRNA part of data. 24-nt phasiRNAs are found to accumulate in all cell types, with the highest levels in meiocytes, followed by tapetum.

2022-03-23 | GSE182476 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data