Comprehensive annotations of alternative splicing, lncRNAs, and circRNAs in seven species of flowering plants
Gabel, A.; Schuster, C.; Drost, H.-G.; Meyerowitz, E. M.; Grosse, I.
Show abstract
The successful occupation of terrestrial habitats by early plants was catalyzed by the adaptive evolution of new organs able to supply water and compensate for the gravitational impact under changing land conditions. Because plants are sessile, it has been proposed that the capacity of plants to innovate specialized organs is driven by a complex interplay between developmental gene expression and regulatory RNAs such as lncRNAs and circRNAs, evolving through sequence polymorphisms, genomic rearrangements, and expression divergence. Despite the importance of alternative and noncoding transcripts for enabling plant life, their accurate quantification causes major challenges as many of them are expressed at low levels and tissue-specific. Here, we describe the re-annotation of seven land plant genomes based on deep, organ-specific, ribo-depleted developmental RNA-Seq data. Using this comparative resource, we uncover 5,000 new lncRNAs and 2,000 new circular RNAs that are promising candidates for further functional investigation. Our annotation will become a reference catalog for studies on plant organ evolution and for uncovering tissue-specific patterns of transcript emergence.
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