02034nas a2200241   4500000000100000000000100001008004100002260001200043653002500055653001200080653002500092653002000117653001100137653002300148653000900171653001800180100001600198700001900214245007600233490000700309520146200316022001401778       2024                            d  c08/202410aMVA and MEP pathways10aRNA-Seq10aAlternative Splicing10acircadian clock10alncRNA10aphotomorphogenesis10aRice10aTranscriptome1 aParul Gupta1 aPankaj Jaiswal00aTranscriptional Modulation during Photomorphogenesis in Rice Seedlings.0 v153 a<p>Light is one of the most important factors regulating plant gene expression patterns, metabolism, physiology, growth, and development. To explore how light may induce or alter transcript splicing, we conducted RNA-Seq-based transcriptome analyses by comparing the samples harvested as etiolated seedlings grown under continuous dark conditions vs. the light-treated green seedlings. The study aims to reveal differentially regulated protein-coding genes and novel long noncoding RNAs (lncRNAs), their light-induced alternative splicing, and their association with biological pathways. We identified 14,766 differentially expressed genes, of which 4369 genes showed alternative splicing. We observed that genes mapped to the plastid-localized methyl-erythritol-phosphate (MEP) pathway were light-upregulated compared to the cytosolic mevalonate (MVA) pathway genes. Many of these genes also undergo splicing. These pathways provide crucial metabolite precursors for the biosynthesis of secondary metabolic compounds needed for chloroplast biogenesis, the establishment of a successful photosynthetic apparatus, and photomorphogenesis. In the chromosome-wide survey of the light-induced transcriptome, we observed intron retention as the most predominant splicing event. In addition, we identified 1709 novel lncRNA transcripts in our transcriptome data. This study provides insights on light-regulated gene expression and alternative splicing in rice.</p>  a2073-4425