Project description:Background: Litchi has high commercial value for its bright color and rich nutrients. However, it deteriorates with the pericarp turning brown within 1-2 days after harvest. The factors that mediate litchi fruit senescence are complicated. MicroRNAs act as negative regulators involving in almost every physiological process. To understand the mechanism of litchi fruit senescence and pericarp browning from miRNA level, five small RNA libraries and a degradome library from the pericarp of litchi fruit stored at ambient and post cold shelf-life were sequenced. Results: By aligning the sRNA reads onto litchi unigene assembly, 296 miRNAs belonging to 49 known miRNA families were first identified from litchi. In addition, eleven litchi-specific miRNAs were identified. Among these, 167 known miRNAs were identified to cleave 197 targets, and three litchi-specific miRNAs were found to have five targets. Through combined analysis of stem-loop quantitative real-time polymerase chain reaction (qRT-PCR) and transcriptome profiling, 14 miRNA-target pairs were found to be actively involved in litchi fruit senescence-related processes, including energy regulation, anthocyanin metabolism, hormone signaling, and pathogen-infection defense. Conclusions: A network of miRNA-target that regulates litchi fruit senescence has been proposed, revealing the miRNA-mediated regulation in senescent litchi fruit. This will aid to develop new strategies to postpone the senescence of litchi fruit and other horticultural products.
Project description:Purpose: transcriptome sequencing of Conopomorpha sinensis Methods: high-through Illumina HiSeqTM 2000 Results:66017 transcripts,35383 unigenes Conclusions:This study provided valuable transcriptome data for the litchi fruit borer, which was the first fundamental genomic basis for exploiting gene resources from the litchi fruit borer
Project description:To investigate the potential mechanism of disease resistance in Litchi, a genome-wide transcriptomic analysis was carried out using 'Guiwei' and 'Yurong1' Litchi under inoculated with P.litchii treatments.
