title: Discovery of microRNAs and transcript targets related to witches' broom disease in Paulownia fortunei by high-throughput sequencing and degradome approach.
abstract: Paulownia witches' broom (PaWB) caused by the phytoplasma is a devastating disease of Paulownia trees. It has caused heavy yield losses to Paulownia production worldwide. However, knowledge of the transcriptional and post-transcriptional regulation of gene expression by microRNAs (miRNAs), especially miRNAs responsive to PaWB disease stress, is still rudimentary. In this study, to identify miRNAs and their transcript targets that are responsive to PaWB disease stress, six sequencing libraries were constructed from healthy (PF), PaWB-infected (PFI), and PaWB-infected, 20 mg L(-1) methyl methane sulfonate-treated (PFI20) P. fortunei seedlings. As a result, 95 conserved miRNAs belonging to 18 miRNA families, as well as 122 potential novel miRNAs, were identified. Most of them were found to be a response to PaWB disease-induced stress, and the expression levels of these miRNAs were validated by quantitative real-time PCR analysis. The study simultaneously identified 109 target genes from the P. fortunei for 14 conserved miRNA families and 24 novel miRNAs by degradome sequencing. Furthermore, the functions of the miRNA targets were annotated based on Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analysis. The results presented here provide the groundwork for further analysis of miRNAs and target genes responsive to the PaWB disease stress, and could be also useful for addressing new questions to better understand the mechanisms of plant infection by phytoplasma in the future.
authors.affiliation: Institute of Paulownia, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.|College of Forestry, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.
authors.forename: Suyan
authors.initials: S
authors.lastname: Niu
authors.affiliation: Institute of Paulownia, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China. fanguoqiangdr@163.com.|College of Forestry, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China. fanguoqiangdr@163.com.
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Fan
authors.affiliation: Institute of Paulownia, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.|College of Forestry, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.
authors.forename: Minjie
authors.initials: M
authors.lastname: Deng
authors.affiliation: Institute of Paulownia, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.|College of Forestry, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.
authors.forename: Zhenli
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Institute of Paulownia, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.|College of Forestry, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.
authors.forename: Enkai
authors.initials: E
authors.lastname: Xu
authors.affiliation: Institute of Paulownia, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.|College of Forestry, Henan Agricultural University, 95 Wenhua Road, Jinsui District, Zhengzhou, 450002, Henan, People's Republic of China.
authors.forename: Lin
authors.initials: L
authors.lastname: Cao
mesh_terms: D001424:Bacterial Infections / Q000235:genetics* / Q000382:microbiology; D029865:Cytisus / Q000235:genetics* / Q000382:microbiology; D018506:Gene Expression Regulation, Plant / Q000235:genetics*; D017343:Genes, Plant / Q000235:genetics; D019684:Magnoliopsida / Q000235:genetics* / Q000382:microbiology; D035683:MicroRNAs / Q000235:genetics*; D045582:Phytoplasma / Q000235:genetics*; D010935:Plant Diseases / Q000235:genetics* / Q000382:microbiology; D036226:Seedlings / Q000235:genetics / Q000382:microbiology; D059467:Transcriptome / Q000235:genetics
chemical_list: D035683:MicroRNAs
keywords: Degradome sequencing; MicroRNA (miRNA); Paulownia fortunei; Paulownia witches’ broom (PaWB); Transcript target