DaoRossiWalshEtAl2015

Référence

Dao, M.C.E., Rossi, S., Walsh, D., Morin, H., Houle, D. (2015) A 6-year-long manipulation with soil warming and canopy nitrogen additions does not affect xylem phenology and cell production of mature black spruce. Frontiers in Plant Science, 6(NOVEMBER). (Scopus )

Résumé

The predicted climate warming and increased atmospheric inorganic nitrogen deposition are expected to have dramatic impacts on plant growth. However, the extent of these effects and their interactions remains unclear for boreal forest trees. The aim of this experiment was to investigate the effects of increased soil temperature and nitrogen (N) depositions on stem intra-annual growth of two mature stands of black spruce [Picea mariana (Mill.) BSP] in Québec, QC, Canada. During 2008–2013, the soil around mature trees was warmed up by 4°C with heating cables during the growing season and precipitations containing three times the current inorganic N concentration were added by frequent canopy applications. Xylem phenology and cell production were monitored weekly from April to October. The 6-year-long experiment performed in two sites at different altitude showed no substantial effect of warming and N-depositions on xylem phenological phases of cell enlargement, wall thickening and lignification. Cell production, in terms of number of tracheids along the radius, also did not differ significantly and followed the same patterns in control and treated trees. These findings allowed the hypothesis of a medium-term effect of soil warming and N depositions on the growth of mature black spruce to be rejected. © 2015 Dao, Rossi, Walsh, Morin and Houle.

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@ARTICLE { DaoRossiWalshEtAl2015,
    AUTHOR = { Dao, M.C.E. and Rossi, S. and Walsh, D. and Morin, H. and Houle, D. },
    TITLE = { A 6-year-long manipulation with soil warming and canopy nitrogen additions does not affect xylem phenology and cell production of mature black spruce },
    JOURNAL = { Frontiers in Plant Science },
    YEAR = { 2015 },
    VOLUME = { 6 },
    NUMBER = { NOVEMBER },
    NOTE = { cited By 0 },
    ABSTRACT = { The predicted climate warming and increased atmospheric inorganic nitrogen deposition are expected to have dramatic impacts on plant growth. However, the extent of these effects and their interactions remains unclear for boreal forest trees. The aim of this experiment was to investigate the effects of increased soil temperature and nitrogen (N) depositions on stem intra-annual growth of two mature stands of black spruce [Picea mariana (Mill.) BSP] in Québec, QC, Canada. During 2008–2013, the soil around mature trees was warmed up by 4°C with heating cables during the growing season and precipitations containing three times the current inorganic N concentration were added by frequent canopy applications. Xylem phenology and cell production were monitored weekly from April to October. The 6-year-long experiment performed in two sites at different altitude showed no substantial effect of warming and N-depositions on xylem phenological phases of cell enlargement, wall thickening and lignification. Cell production, in terms of number of tracheids along the radius, also did not differ significantly and followed the same patterns in control and treated trees. These findings allowed the hypothesis of a medium-term effect of soil warming and N depositions on the growth of mature black spruce to be rejected. © 2015 Dao, Rossi, Walsh, Morin and Houle. },
    ART_NUMBER = { 877 },
    AUTHOR_KEYWORDS = { Boreal forest; Cambial activity; Climate change; Increased soil temperature; Intra-annual growth; N deposition; Wood anatomy; Xylogenesis },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.3389/fpls.2015.00877 },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84947439806&partnerID=40&md5=56eb14562c0ce8964db13ed70ef1de5c },
}

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