Abstract
Long-non-coding RNA (LncRNA) is a kind of non-coding endogenous RNA that plays essential roles in diverse biological processes and various stress responses. To identify and elucidate the intricate regulatory roles of lncRNAs in chilling injury in tomato fruit, deep sequencing and bioinformatics methods were performed here. After strict screening, a total of 1411 lncRNAs were identified. Among these lncRNAs, 239 of them were significantly differentially expressed. A large amount of target genes were identified and many of them were found to code chilling stress related proteins, including redox reaction related enzyme, important enzymes about cell wall degradation, membrane lipid peroxidation related enzymes, heat and cold shock protein, energy metabolism related enzymes, salicylic acid and abscisic acid metabolism related genes. Interestingly, 41 lncRNAs were found to be the precursor of 33 miRNAs, and 186 lncRNAs were targets of 45 miRNAs. These lncRNAs targeted by miRNAs might be potential ceRNAs. Particularly, a sophisticated regulatory model including miRNAs, lncRNAs and their targets was set up. This model revealed that some miRNAs and lncRNAs may be involved in chilling injury, which provided a new perspective of lncRNAs role.
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