ArticleBMC genomics2019
Tissue-specific transposon-associated small RNAs in the gymnosperm tree, Norway spruce.
Article in BMC genomics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 17 citations in OpenAlex.
- The Torreya grandis genome illuminates the origin and evolution of gymnosperm-specific sciadonic acid biosynthesis.Nature communications · 2023Article
- Small RNAs and Karma methylation in Elaeis guineensis mother palms are linked to high clonal mantling.Plant molecular biology · 2023Article
- Retrotransposons: How the continuous evolutionary front shapes plant genomes for response to heat stress.Frontiers in plant science · 2022Review
- The emerging role of small RNAs in ovule development, a kind of magic.Plant reproduction · 2021Review
- The epigenetic origin of life history transitions in plants and algae.Plant reproduction · 2021Review
- Comparative phylogenetics of repetitive elements in a diverse order of flowering plants (Brassicales).G3 (Bethesda, Md.) · 2021Article
- Polycomb Repressive Complex 2-mediated histone modification H3K27me3 is associated with embryogenic potential in Norway spruce.Journal of experimental botany · 2020Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
backgroundSmall RNAs (sRNAs) are regulatory molecules impacting on gene expression and transposon activity. MicroRNAs (miRNAs) are responsible for tissue-specific and environmentally-induced gene repression. Short interfering RNAs (siRNA) are constitutively involved in transposon silencing across different type of tissues. The male gametophyte in angiosperms has a unique set of sRNAs compared to vegetative tissues, including phased siRNAs from intergenic or genic regions, or epigenetically activated siRNAs. This is contrasted by a lack of knowledge about the sRNA profile of the male gametophyte of gymnosperms.
resultsHere, we isolated mature pollen from male cones of Norway spruce and investigated its sRNA profiles. While 21-nt sRNAs is the major size class of sRNAs in needles, in pollen 21-nt and 24-nt sRNAs are the most abundant size classes. Although the 24-nt sRNAs were exclusively derived from TEs in pollen, both 21-nt and 24-nt sRNAs were associated with TEs. We also investigated sRNAs from somatic embryonic callus, which has been reported to contain 24-nt sRNAs. Our data show that the 24-nt sRNA profiles are tissue-specific and differ between pollen and cell culture.
conclusionOur data reveal that gymnosperm pollen, like angiosperm pollen, has a unique sRNA profile, differing from vegetative leaf tissue. Thus, our results reveal that angiosperm and gymnosperm pollen produce new size classes not present in vegetative tissues; while in angiosperm pollen 21-nt sRNAs are generated, in the gymnosperm Norway spruce 24-nt sRNAs are generated. The tissue-specific production of distinct TE-derived sRNAs in angiosperms and gymnosperms provides insights into the diversification process of sRNAs in TE silencing pathways between the two groups of seed plants.
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