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Title: Tissue-specific study across the stem reveals the chemistry and transcriptome dynamics of birch bark
Authors: Alonso-Serra, Juan
Safronov, Omid
Lim, Kean-Jin
Fraser-Miller, Sara J.
Blokhina, Olga B.
Campilho, Ana
Chong, Sun-Li
Fagerstedt, Kurt
Haavikko, Raisa
Helariutta, Ykä
Immanen, Juha
Kangasjärvi, Jaakko
Kauppila, Tiina J.
Lehtonen, Mari
Ragni, Laura
Rajaraman, Sitaram
Räsänen, Riikka-Marjaana
Safdari, Pezhman
Tenkanen, Maija
Yli-Kauhaluoma, Jari T.
Teeri, Teemu H.
Strachan, Clare J.
Nieminen, Kaisa
Salojärvi, Jarkko
Keywords: Science::Biological sciences
Issue Date: 2019
Source: Alonso‐Serra, J., Safronov, O., Lim, K.-J., Fraser‐Miller, S. J., Blokhina, O. B., Campilho, A., . . . Salojärvi, J. (2019). Tissue‐specific study across the stem reveals the chemistry and transcriptome dynamics of birch bark. New Phytologist, 222(4), 1816-1831. doi:10.1111/nph.15725
Journal: New Phytologist
Abstract: Tree bark is a highly specialized array of tissues that plays important roles in plant protection and development. Bark tissues develop from two lateral meristems; the phellogen (cork cambium) produces the outermost stem-environment barrier called the periderm, while the vascular cambium contributes with phloem tissues. Although bark is diverse in terms of tissues, functions and species, it remains understudied at higher resolution. We dissected the stem of silver birch (Betula pendula) into eight major tissue types, and characterized these by a combined transcriptomics and metabolomics approach. We further analyzed the varying bark types within the Betulaceae family. The two meristems had a distinct contribution to the stem transcriptomic landscape. Furthermore, inter- and intraspecies analyses illustrated the unique molecular profile of the phellem. We identified multiple tissue-specific metabolic pathways, such as the mevalonate/betulin biosynthesis pathway, that displayed differential evolution within the Betulaceae. A detailed analysis of suberin and betulin biosynthesis pathways identified a set of underlying regulators and highlighted the important role of local, small-scale gene duplication events in the evolution of metabolic pathways. This work reveals the transcriptome and metabolic diversity among bark tissues and provides insights to its development and evolution, as well as its biotechnological applications.
ISSN: 0028-646X
DOI: 10.1111/nph.15725
Rights: © 2019 The Authors. New Phytologist © 2019 New Phytologist Trust. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SBS Journal Articles

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