Oryza
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA579440 | ENA |
REPOSITORIES: ENA
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Project description:Oryza longistaminata is an African wild rice species that possesses special traits for breeding applications. Self-incompatibility is the main cause of sterility in O. longistaminata, but here we demonstrated that its pollen fertility and vitality are normal. Lipid and carbohydrate metabolism were active throughout pollen development. In this study, transcriptomics quantitative analysis was used to investigate the profiles of genes related to lipid and carbohydrate metabolism in 4-, 6- and 8.5-mm O. longistaminata spikelets before flowering. We documented cytological changes throughout important stages of anther development, including changes in reproductive cells as they formed mature pollen grains through meiosis and mitosis. RNA-seq and proteome association analysis indicated that fatty acids were converted to sucrose after the 6-mm spikelet stage, based on the abundance of most key enzymes of the glyoxylate cycle and gluconeogenesis. In conclusion, our study provides novel insights into the pollen viability of O. longistaminata at the transcriptome level, which can be used to improve the efficiency of male parent pollination in hybrid rice breeding applications.
2021-07-31 | GSE181045 | GEO
Project description:Oryza longistaminata, a wild rice, vegetatively reproduces and forms a networked clonal colony consisting of ramets connected by rhizomes. Although water, nutrients, and other molecules can be transferred between ramets via the rhizomes, inter-ramet communication in response to spatially heterogeneous nitrogen availability is not well understood. We analyzed the transcriptomic response of ramet pairs to heterogeneous nitrogen availability by using a split hydroponic system that allowed each ramet root to be exposed to different conditions.
2021-08-23 | GSE182486 | GEO
Project description:The Oryza longistaminata is a perennial wild rice species with AA genome, which characterized by the presence of rhizomatous stem. The rhizomatousness trait in rice was previously identified quantitatively controlled by many genes, but the molecular mechanism related to the rhizome initiation and elongation is still unknown. In this study, the specific gene expression patterns across five tissues in O. longistaminata, especially in the rhizome were characterized by using the Affymetrix rice microarray platform, the rhizome-specific expressed genes and its corresponding regulatory were further analyzed. The different gene sets were determined exclusively expressed in five tissues; strikingly 58 genes with functions related to transcription regulation and cell proliferation were identified as prevalent sets in rhizome tip, of them, several genes were functionally involved in tiller initiation and elongation. And a set of genes were differentially regulated in the rhizome tip relative to shoot tip, the predominant repressed genes are involved in photosynthesis, while genes related to phytohormone and the gene families with redundancy function were obviously differentially regulated. Several cis-regulatory elements, including CGACG, GCCCORE, GAGAC and a Myb Core, were highly enriched in rhizome tip or internode, and two cis-elements such as RY repeat and TAAAG, which implicated in the ABA signaling pathway, were found overrepresented in the rhizome tip in comparison with shoot tip. A few rhizome-specific expressed genes were co-localized on the rhizome-related QTLs regions, indicating these genes may be good functional candidates for the rhizome related gene cloning. The whole genome profiling of oryza longistaminata indicated that a very complex gene regulatory network underlies rhizome development and growth, and there might be an overlapping regulatory mechanism in the establishment of rhizome and tiller. Phytohormone such as IAA and GA are involved in the signaling pathway in determining rhizome. Several cis-elements enriched in rhizome and the identified rhizome-specific genes co-localized on the rhizome-related QTL intervals provide a base for further dissection of the molecular mechanism of rhizomatousness In this study, the specific gene expression patterns across five tissues including rhizome tip (RT, distal 1 cm of the young rhizome), rhizome internodes (RI), shoot tip (ST, distal 5 mm of the tiller after removing all leaves), shoot internodes (SI) and young leaf (YL) in O. longistaminata, especially in the rhizome were characterized by using the Affymetrix rice microarray platform.
2010-10-31 | E-GEOD-24228 | biostudies-arrayexpress