Project description:Tung oil, the major product of tung tree (Vernicia fordii) seeds, is one of the highest quality oils for industrial applications and has been considered to the production of biodiesel. Because of the poor agronomical traits of this crop, efforts have been made to breed tung tree for higher fruit yield and for modification of oil properties to be used as biodiesel, or to engineer higher yielding plants to produce tung oil. However, these efforts have been hampered by the lack of molecular information since there is no available genome and the identified and characterized transcripts of tung are scarce. Furthermore, there are still many knowledge gaps regarding tung oil biosynthesis. To provide a comprehensive and accurate foundation for molecular studies of tung tree, herein we present the reference transcriptome dataset of tung mature seeds. A set of 43,081,927 ESTs were assembled into 47,585 unigenes. The homology search using blastx against the GenBank non-redundant protein database and the Swiss-Prot database resulted in the annotation of 96 % and 81% of the unigenes, respectively. We also systematically arranged the series of transcripts potentially associated with oil biosynthesis and breakdown and examined the expression profile of a subset of those genes in samples from different stages of seed development, providing a valuable source of genes and transcriptional information related to these pathways. This study represents the first large-scale transcriptome annotation of tung tree seeds and will be useful to breed tung for oil properties and other agronomical traits.
2017-04-09 | GSE56652 | GEO
Project description:Tung tree transcriptome Different tissues transcriptome of tung tree
| PRJNA483508 | ENA
Project description:Tung tree seed transcriptome
| PRJNA770124 | ENA
Project description:Transcriptome sequencing: Leaf blades of the tung-flower tree
Project description:Background: Vernicia fordii (Tung oil tree) is a popular tree for biodiesel production in China. Unfortunately, the devastating Fusarium wilt disease caused great losses in production. Its sister species (Vernicia montana) was shown resistant to this pathogen. Vernicia fordii and Vernicia montana are main Vernicia species. V. fordii owns superior oil and agronomic traits, but susceptible to tung wilt disease, while V. nontana is resistant the wilt. However, the plants response mechanism remains largely unknown. Method: To define the divergence of gene expression modules between the resistant and susceptible Vernicia species responding to tung wilt pathogen, we generated comparative transcriptome atlases of two species during the process of infection with the pathogen F. oxysporum by RNA Sequencing in three biological replicates. Results: We describe the de novo assembly of the transcriptome of V. fordii and V. montana, comprising 258,430 and 245,240 non-redundant transcripts with N50 of 1,776 and 2,452 respectively. About 44,310 pair of putatively one-to-one orthologous genes between V. fordii and V. montana transcriptoms were identified. Overall, a high proportion of orthologous genes shared remarkably similar expression mode between Vernicia species. K means clustering indicated 2 cluster appear opposite expression mode. The highly connected gene expression analysis were conducted among genes with significantly differential expression mode, and the result indicated D6PK and LRR-RLK CLAVATA2 were top hub genes and hub genes glycosyltransferase (Gts), GLABRA2, PERK15 and EREBP-like factor were significantly associated with pathologic grades in resistant V. montana. Moreover, the result showed the resistant is a crucial signaling network, where MAPK signaling pathway, Plant-pathogen interaction, Circadian rhythm, Calcium signaling pathway and apoptosis fulfill distinct function. Additionally, dozens of unigenes were validated by quantitative real-time PCR (qRT-PCR). The study provided insight into the resistance gene expression modules. Conclusion: We first conducted a system analyses of the dynamics of gene expression both in susceptible and resistant Vernicia species with pathogen F. oxysporum infection. The results will serve as the important foundation to further deeply validation the resistance mechanism and breeding of the woody biodiesel plants V. fordii and V. montana.
2017-02-08 | GSE80228 | GEO
Project description:Exogenous 6-BA treatment inflorescence buds transcriptome of tung tree
Project description:MicroRNAs (miRNAs) are non-coding, short, single-stranded RNAs with essential roles in gene regulation in various organisms including higher plants. In contrast to the vast information on miRNAs from many economically important plants, almost nothing has been reported on the identification or analysis of miRNAs from rubber tree (Hevea brasiliensis L.), the most important natural rubber-producing crop. To identify miRNAs and their target genes in rubber tree, high throughput sequencing combined with a computational approach was performed. Four small RNA libraries were constructed for deep sequencing from mature and young leaves of two rubber tree clones, PB 260 and PB 217, which provide high and low latex yield, respectively. 237 miRNAs belonging to 37 known miRNA families were identified, and northern hybridization validated miRNA expression and revealed developmental stage-dependent and clone-specific expression for some miRNAs. We took advantage of the newly released rubber tree genome assembly as well as the genomic databases from leafy spurge and cassava, two species related to rubber tree, and predicted 15 novel miRNAs.
Project description:Deep sequencing of mRNA from Chinese tree shrew; Chinese tree shrew (Tupaia belangeri chinensis) is placed in Order Scandentia and embraces many unique features for a good experimental animal model. Currently, there are many attempts to employ tree shrew to establish model for a variety of human disorders such as social stress, myopia, HCV and HBV infection, and hepatocellular carcinoma .We present here a publicly available annotated genome sequence for Chinese tree shrew. Phylogenomic analysis of tree shrew and other mammalians highly supported its close affinity to primates. Characterization of key factors and signaling pathways of the nervous and immune systems in tree shrews showed that this animal had common and unique features, and had essential genetic basis for being a promising model for biomedical researches.