Project description:We aimed to identify miRNA regulated by alternate bearing in O. europaea. For this purpose, six olive (Olea europaea L. )(Ayvalık variety) small RNA libraries were constructed from fruits (ripe and unripe) and leaves ("on-year" and "off-year" mature -leaven in November and juvenile - leaven in July plants) and sequenced by high-throughput Illumina sequencing. Bioinformatics analyses of 93,526,915 reads identified 135 conserved miRNA, belonging to 22 miRNA families in olive tree. In addition, 38 novel miRNA were discovered in the datasets. Expression of olive tree miRNA varied greatly among the six libraries, indicating contribution of diverse miRNA in balancing between reproductive and vegetative phases. The differential expression of miRNA was evaluated on the basis of the developmental phase of the samples.
Project description:We aimed to identify miRNA regulated by alternate bearing in O. europaea. For this purpose, six olive (Olea europaea L. )(Ayvalık variety) small RNA libraries were constructed from fruits (ripe and unripe) and leaves ("on-year" and "off-year" mature -leaven in November and juvenile - leaven in July plants) and sequenced by high-throughput Illumina sequencing. Bioinformatics analyses of 93,526,915 reads identified 135 conserved miRNA, belonging to 22 miRNA families in olive tree. In addition, 38 novel miRNA were discovered in the datasets. Expression of olive tree miRNA varied greatly among the six libraries, indicating contribution of diverse miRNA in balancing between reproductive and vegetative phases. The differential expression of miRNA was evaluated on the basis of the developmental phase of the samples. Sequences of six olive miRNAs (Olea europaea L. )(Ayvalık variety) plants (ripe and unripe fruits, leaves of mature and juvenile plants of both "on-year" and "off-year") were generated by Illumina sequencing
Project description:We carried out genome wide transcriptome analyses in different organs and developmental stages of the olive tree using the NimbleGen Array oligonucleotide probe sets. Cluster analyses of the genes showed that samples collected from different organs could be sorted into separate groups. The nutritional control had a particularly remarkable impact on the alternate bearing for O. europaea, as shown by the differential expressions of transcripts under different developmental phases and organs
Project description:The successful proliferation and differentiation of testicular cells are vital for the survival, continuity and preservation of species. However, a comprehensive molecular orchestration underlying the spermatogenic process in teleost testis development throughout the annual cycle remains elusive. In this study, the testicular cells derived from adult black rockfish at distinct stages—Regressed, Regenerating, and Differentiating were dissected via single cell transcriptome sequencing. A continuous developmental trajectory of spermatogenic cells, from spermatogonia to spermatids, was delineated, elucidating the molecular events involved in the spermatogonia development. Subsequently, the dynamic regulation of gene expressions associated with spermatogonia proliferation and differentiation was observed across spermatogonia subgroups and various developmental stages. A bioenergetic transition from glycolysis to mitochondrial respiration of spermatogonia during annual developmental cycle was demonstrated, and a deeper level of heterogeneity and molecular characteristics was revealed by re-clustering analysis. The developmental trajectory of Sertoli cells in annual reproductive cycle was examined, and the divergence of Leydig cells and macrophage were explored. Additionally, the interaction network between testicular micro-environment somatic cells and spermatogenic cell were established. Overall, our study provides detailed information on both germ and somatic cells within teleost testis during annual reproductive cycle, along with insights into the molecular regulation of spermatogonia dynamics, which lay the foundation for spermatogenesis regulation and germplasm preservation of endangered species.
Project description:Olive (Olea europaea L.) is one of the most economically relevant tree crops in the Mediterranean basin. In this study, a comparative proteomic along with metabolomic-wide investigation was carried out on drupes of Greek olive cultivar 'Chondrolia Chalkidikis', collected across six developmental stages (S), namely seed development (S1, S2), mesocarp development (S3, S4, S5) and full maturation (S6). These stages were first characterized through the dynamics of fruit weight, dimensions and color parameters such as lightness, redness and yellowness. Combined gas chromatography–mass spectrometry and reversed–phase liquid chromatography quadrupole–time–of–flight mass spectrometry (RPLC–QToF–MS) procedures quantified 47 primary (e.g. allose, galactose, quinic acid, sorbitol, stearic acid) and 21 secondary (e.g. elenolic acid, oleacin, rutin, luteolin, hydroxytyrosol) metabolites in mesocarp samples during development. Protein analysis via nano–LC coupled to HDAM Orbitrap mass spectrometer, identified 3258 proteins from which the 350 were differentially accumulated between the final maturation stages (S5 and S6). Olive genome-based functional annotation showed that the largest proportion of identified proteins were involved in primary metabolism [i.e. lipoxygenases (LOX1/5)], energy [i.e. ferredoxin NADP+ reductase (FNR)], signal transduction [i.e. serine/threonine kinases (SAPK2, SRK2A, STK), transcription [i.e. elongation factor 2 (EEF2)] and protein destination [i.e. serine carboxypeptidase (SCPL)]. This investigation provides a reference framework for further nutritional and breeding studies, also allowing cross comparison among other olive cultivars.