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ABSTRACT:
PROVIDER: PRJNA605549 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Epimedium pseudowushanense Organism overview
| PRJNA319124 | ENA
Project description:Epimedium pseudowushanense B.L.Guo Transcriptome
| PRJNA395203 | ENA
Project description:The molecular mechanism of seed morphophysiological dormancy of Epimedium pseudowushanense B.L.Guo. remains largely unknown. The endogenous ABA and GA content of E. pseudowushanense seeds at three developmental stages was quantitatively determined. The result showed the levels of ABA in E. pseudowushanense seeds decreased during the seed embryo growing and development, levels of GA3 increased during seed embryo growing, and levels of GA4 increased during seed dormancy releasing and seed sprouting. High-throughput sequencing method was used for reveal the E. pseudowushanense seed transcriptome. The transcriptome data were assembled as 178,613 unigenes and the numbers of differentially expressed unigenes between the seed development stages were compared. By computer analysis of the KEGG reference pathways, twelve candidate genes were likely to be involved in metabolism and signaling of abscisic acid and gibberellins. The expression patterns of these genes were revealed by real-time quantitative RT-PCR. Phylogenetic relationships among the deduced E. pseudowushanense proteins and their homologous in other plant species were analyzed. The results indicate EpNCED1, EpNCED2, EpCYP707A1 and EpCYP707A2 are likely to be involved in ABA biosynthesis and catabolism. EpSnRK2 is likely implicated in ABA signaling during seed dormancy. EpGA3ox is likely to be involved in gibberellin biosynthesis, and EpDELLA1 and EpDELLA2 are likely implicated in GA signaling. This study was the first to provide the E. pseudowushanense seed transcriptome and the key genes involved in metabolism and signaling of abscisic acid and gibberellins, and so it is valuable for studies on seed morphophysiological dormancy mechanism
2018-05-21 | GSE79474 | GEO
Project description:Peripheral light harvesting (LH) antenna complexes have been studied extensively in the purple nonsulfur bacterium Rhodopseudomonas palustris because it produces different types of LH complexes under high light intensities (LH2 complex) and low light intensities (LH3 and LH4 complex). The ability of R. palustris to alter its peripheral LH complexes in response to changes in light intensity is attributed to the multiple operons that encode the a and b peptides that make up these complexes, whose expression is affected by light intensity, light quality, and oxygen tension. However, low resolution structures, amino acid similarities between the complexes, and a lack of transcriptional analysis made it difficult to determine the LH complexes composition and functions under different light intensities. It was also unclear how much diversity of the R. palustris LH complexes exists in nature.Results: To gain insight into the composition of the LH complexes, their function under high light intensities and low light intensities, and their prevalence in the environment we undertook an integrative genomics approach using 15 closely related R. palustris strains isolated from the environment and 5 R. palustris ecotypes whose genomes have been sequenced. We sequenced the genomes for the 15 closely related strains and using RNA-seq carried out transcriptomic analysis on all 20 strains grown under high light intensity and low light intensity. We were able to determine that even closely related R. palustris strains had differences in their pucBA gene content and expression, even under the same growth conditions. We also found that the LH2 complex could compensate for the lack of an LH4 complex under LL intensities but not under extremely LL intensities. Conclusions: This is the first time an integrative genomics approach has been used to study light harvesting in the environment. The variation observed in LH gene composition and expression in environmental isolates of R. palustris likely reflects how these strains have adapted to specific light conditions in the environment. We have also shown that there is redundancy between some of the LH complexes under certain light intensities, which may partially explain why multiple operons encoding LH complexes have evolved and been maintained in R. palustris.
2015-03-01 | GSE59544 | GEO
Project description:Epimedium pseudowushanense Raw sequence reads
| PRJNA302573 | ENA