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Transcriptional Roadmap to Seasonal Variation in Wood Formation of Norway Spruce
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC). Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Sveriges Lantbruksuniversitet, SE-901 83 Umeå, Sweden.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).
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2018 (Engelska)Ingår i: Plant Physiology, ISSN 0032-0889, E-ISSN 1532-2548, Vol. 176, nr 4, s. 2851-2870Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Seasonal cues influence several aspects of the secondary growth of tree stems, including cambial activity, wood chemistry, and transition to latewood formation. We investigated seasonal changes in cambial activity, secondary cell wall formation, and tracheid cell death in woody tissues of Norway spruce (Picea abies) throughout one seasonal cycle. RNA sequencing was performed simultaneously in both the xylem and cambium/phloem tissues of the stem. Principal component analysis revealed gradual shifts in the transcriptomes that followed a chronological order throughout the season. A notable remodeling of the transcriptome was observed in the winter, with many genes having maximal expression during the coldest months of the year. A highly coexpressed set of monolignol biosynthesis genes showed high expression during the period of secondary cell wall formation as well as a second peak in midwinter. This midwinter peak in expression did not trigger lignin deposition, as determined by pyrolysis-gas chromatography/mass spectrometry. Coexpression consensus network analyses suggested the involvement of transcription factors belonging to the ASYMMETRIC LEAVES2/LATERAL ORGAN BOUNDARIES and MYELOBLASTOSIS-HOMEOBOX families in the seasonal control of secondary cell wall formation of tracheids. Interestingly, the lifetime of the latewood tracheids stretched beyond the winter dormancy period, correlating with a lack of cell death-related gene expression. Our transcriptomic analyses combined with phylogenetic and microscopic analyses also identified the cellulose and lignin biosynthetic genes and putative regulators for latewood formation and tracheid cell death in Norway spruce, providing a toolbox for further physiological and functional assays of these important phase transitions.

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American Society of Plant Biologists , 2018. Vol. 176, nr 4, s. 2851-2870
Nationell ämneskategori
Cellbiologi
Identifikatorer
URN: urn:nbn:se:umu:diva-148642DOI: 10.1104/pp.17.01590ISI: 000429089100021PubMedID: 29487121OAI: oai:DiVA.org:umu-148642DiVA, id: diva2:1222532
Projekt
Bio4Energy
Forskningsfinansiär
Knut och Alice Wallenbergs Stiftelse, KAW 2013.0305Kempestiftelserna, SMK-1340Vetenskapsrådet, 621-2013-4949Vinnova, 2015-02290Tillgänglig från: 2018-06-21 Skapad: 2018-06-21 Senast uppdaterad: 2019-08-30Bibliografiskt granskad

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Schiffthaler, BastianMannapperuma, ChanakaPrestele, JakobStreet, NathanielTuominen, Hannele

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Schiffthaler, BastianMannapperuma, ChanakaPrestele, JakobStreet, NathanielTuominen, Hannele
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Institutionen för fysiologisk botanikUmeå Plant Science Centre (UPSC)
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