Project description:Bamboo represents the only major lineage of grasses that is native to forests and is one of the most important non-timber forest products in the world. Moso bamboo is a large woody bamboo that has ecological, economic and cultural value in Asia and accounts for ~70% of the total bamboo growth area (Peng et al., 2013). In the aspect of epigenetics of Moso bamboo,the total genomic DNA methylation rates in Moso bamboo at different chronological ages were significantly different (Yuan et al., 2014). Those show that the flowering of Moso bamboo are closely related to epigenetic modification. However, DNA methylation in single base resolution has never been reported in moso bamboo. In this study, leaves from three-week bamboo, one-year bamboo, flower in next year bamboo, flowering bamboo and Flower florets was used for bisulfite sequencing (BS-seq), and RNA-Seq. Genome-wide methylation profile and gene expression analysis were constructed to reveal the factors to regualte the phase transition from vegetative to reproductive growth in moso bamboo.
Project description:Bamboo represents the only major lineage of grasses that is native to forests and is one of the most important non-timber forest products in the world. Moso bamboo is a large woody bamboo that has ecological, economic and cultural value in Asia and accounts for ~70% of the total bamboo growth area (Peng et al., 2013). In the aspect of epigenetics of Moso bamboo,the total genomic DNA methylation rates in Moso bamboo at different chronological ages were significantly different (Yuan et al., 2014). Those show that the flowering of Moso bamboo are closely related to epigenetic modification. However, DNA methylation in single base resolution has never been reported in moso bamboo. In this study, leaves from three-week bamboo, one-year bamboo, flower in next year bamboo, flowering bamboo and Flower florets was used for bisulfite sequencing (BS-seq), and RNA-Seq. Genome-wide methylation profile and gene expression analysis were constructed to reveal the factors to regualte the phase transition from vegetative to reproductive growth in moso bamboo.
Project description:In mammals, it is well known that DNA methylation has important roles during aging. However, age-related DNA methylation changes during phase transitions largely remain unclear in plants. Moso bamboo needs a very long time to transition from vegetative to floral phase. To comprehensively investigate the influence of DNA methylation on aging, we present here a distinctive single-base-resolution DNA methylation profile using both high-throughput bisulfite sequencing (BS-Seq) and single-molecule nanopore-based DNA sequencing, which covers the long period of vegetative growth and transition to flowering of moso bamboo’s development. We discovered that CHH methylation gradually accumulated from vegetative to reproductive growth in a time-dependent fashion. Importantly, DMR (differential DNA methylation) correlating with chronological aging occurred preferentially at both transcription start sites (TSS) and transcription termination sites (TTS). Genes with CG methylation changes showed enrichment of gene ontology (GO) categories in ‘vegetative to reproductive phase transition of meristem’. In addition, In combination with mRNA sequencing (RNA-Seq) revealed that DNA methylation in promoter, intron, and exon has different roles in regulating gene expression. Finally, circular RNA sequencing (circRNA-Seq) revealed that flanking introns of circRNAs show hypermethylation. Further analysis revealed that these flanking introns were enriched in LTR-retrotransponsons. Together, observations in this study provide insights about dynamic DNA methylation and circRNAs landscape with chronological ages, which paves the way to further study the impact of epigenetic factors on flowering in moso bamboo.
Project description:The small RNA libraries from Moso bamboo (Phyllostachy heterocycla) roots and leaves were constructed by using high definition adapters . The small RNA profiles were analyzed. A collection of micro RNAs with similarity to the micro RNA entries in mirbase were discovered. The putative genomic loci of the micro RNAs were identified. Analysis of small RNA profiles from the root and leaf tissues of young Moso Bamboo seedlings
Project description:Bamboo is a large Poaceae perennial with 1,642 species worldwide. We reported single-cell transcriptomes of 14,279 filtered single cells derived from the basal root tips of Moso bamboo.