Abstract
Novel strategies for improvement of ornamental plants and their properties relay on miRNA control of differential plant gene expression modulation. Still, in response to the same abiotic stresses, some conserved miRNA families show different expression patterns in different plant species. In parallel, the use of deep sequencing technologies reveals new levels of complexity of regulatory networks in plants through identification of new miRNAs. Fritillaria imperialis plants were collected from their natural habitats in Koohrang, Chaharmahalva Bakhtiari, Iran. Several tissues including stamen, pistil, petal, sepal, leaf, stem, bulb and fruit were collected during three developmental stages (stem elongation, flower development and seed head stages). Using RNAseq and qRT-PCR approach, this research revealed 21 conserved miRNAs, matching 15 miRNA families, in Fritilaria imperialis. The expression of seven conserved miRNAs (Fim-miR156b, Fim-miR159, Fim-miR166a-5p, Fim-miR169d-5p, Fim-miR171c, Fim-miR393 and Fim-miR396e-3p) was further investigated in different tissues and three developmental stages, suggesting different roles for these miRNAs during growth and development of crown imperial. Gained knowledge from this research can open the door to find efficient ways to secure crown imperial survival, preservation and utilization and if proven useful may be applied in other plant species as well.
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