title: Small RNA and Degradome Sequencing Reveal Complex Roles of miRNAs and Their Targets in Developing Wheat Grains.
abstract: Plant microRNAs (miRNAs) have been shown to play critical roles in plant development. In this study, we employed small RNA combined with degradome sequencing to survey development-related miRNAs and their validated targets during wheat grain development. A total of 186 known miRNAs and 37 novel miRNAs were identified in four small RNA libraries. Moreover, a miRNA-like long hairpin locus was first identified to produce 21~22-nt phased siRNAs that act in trans to cleave target mRNAs. A comparison of the miRNAomes revealed that 55 miRNA families were differentially expressed during the grain development. Predicted and validated targets of these development-related miRNAs are involved in different cellular responses and metabolic processes including cell proliferation, auxin signaling, nutrient metabolism and gene expression. This study provides insight into the complex roles of miRNAs and their targets in regulating wheat grain development.
authors.affiliation: Key Laboratory of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture / Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Tian
authors.initials: T
authors.lastname: Li
authors.affiliation: Shaanxi Key Laboratory of Genetic Engineering for Plant Breeding, College of Agronomy, Northwest A & F University, Yangling, Shaanxi, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.affiliation: Key Laboratory of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture / Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Yuke
authors.initials: Y
authors.lastname: Geng
authors.affiliation: Key Laboratory of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture / Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Chenyang
authors.initials: C
authors.lastname: Hao
authors.affiliation: Shaanxi Key Laboratory of Genetic Engineering for Plant Breeding, College of Agronomy, Northwest A & F University, Yangling, Shaanxi, China.
authors.forename: Xinhong
authors.initials: X
authors.lastname: Chen
authors.affiliation: Key Laboratory of Crop Gene Resources and Germplasm Enhancement, Ministry of Agriculture / Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Xueyong
authors.initials: X
authors.lastname: Zhang
mesh_terms: D001483:Base Sequence; D019295:Computational Biology; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D053263:Gene Regulatory Networks; D017343:Genes, Plant / Q000235:genetics*; D059014:High-Throughput Nucleotide Sequencing / Q000379:methods*; D035683:MicroRNAs / Q000235:genetics* / Q000378:metabolism*; D008969:Molecular Sequence Data; D018749:RNA, Plant / Q000235:genetics*; D060888:Real-Time Polymerase Chain Reaction; D017423:Sequence Analysis, RNA / Q000379:methods*; D012689:Sequence Homology, Nucleic Acid; D014908:Triticum / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism
chemical_list: D035683:MicroRNAs; D018749:RNA, Plant