RossiSimardDeslauriersEtAl2009

Reference

Rossi, S., Simard, S., Deslauriers, A., Morin, H. (2009) Wood formation in Abies balsamea seedlings subjected to artificial defoliation. Tree Physiology, 29(4):551-558.

Abstract

We determined the cambial sensitivity and quantified the anatomical differences in xylem of Abies balsamea (L.) Mill. seedlings subjected to artificial defoliation to simulate spruce budworm feeding. Defoliation was performed by removing two-thirds of needles of all current-year shoots for up to four consecutive growth cycles to account for inter- and intra-annual xylem formation. In Experiment 1, xylem development as studied from May to October 2005 in seedlings defoilated at the end of June. In Experiment 2, anatomical features of the xylem were measured along the tree rings formed in 2005 2005 and 2006 during the four cycles of growth and defoliation. defoliation. Control and defoliated seedlings showed similar patterns of cambial activity and timing of xylem differentiation, although fewer enlarging cells were observed in August to September in defoliated seedlings. Tree-ring widths were similar ill control and defoliated seedlings, with thinner rings produced in the greenhouse in winter. No effect of defoliation on cell lumen area was observed, and effects on radial cell diameter and wall thickness were found only occasionally. The results indicate that the A. balsamea seedlings produced all the resources required to maintain stem growth during, the four cycles of defoliation.

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@ARTICLE { RossiSimardDeslauriersEtAl2009,
    AUTHOR = { Rossi, S. and Simard, S. and Deslauriers, A. and Morin, H. },
    TITLE = { Wood formation in Abies balsamea seedlings subjected to artificial defoliation },
    JOURNAL = { Tree Physiology },
    YEAR = { 2009 },
    VOLUME = { 29 },
    PAGES = { 551-558 },
    NUMBER = { 4 },
    MONTH = { apr },
    ABSTRACT = { We determined the cambial sensitivity and quantified the anatomical differences in xylem of Abies balsamea (L.) Mill. seedlings subjected to artificial defoliation to simulate spruce budworm feeding. Defoliation was performed by removing two-thirds of needles of all current-year shoots for up to four consecutive growth cycles to account for inter- and intra-annual xylem formation. In Experiment 1, xylem development as studied from May to October 2005 in seedlings defoilated at the end of June. In Experiment 2, anatomical features of the xylem were measured along the tree rings formed in 2005 2005 and 2006 during the four cycles of growth and defoliation. defoliation. Control and defoliated seedlings showed similar patterns of cambial activity and timing of xylem differentiation, although fewer enlarging cells were observed in August to September in defoliated seedlings. Tree-ring widths were similar ill control and defoliated seedlings, with thinner rings produced in the greenhouse in winter. No effect of defoliation on cell lumen area was observed, and effects on radial cell diameter and wall thickness were found only occasionally. The results indicate that the A. balsamea seedlings produced all the resources required to maintain stem growth during, the four cycles of defoliation. },
    AF = { Rossi, SergioEOLEOLSimard, SoniaEOLEOLDeslauriers, AnnieEOLEOLMorin, Hubert },
    C1 = { [Rossi, Sergio; Simard, Sonia; Deslauriers, Annie; Morin, Hubert] Univ Quebec, Dept Sci Fondamentales, Chicoutimi, PQ, Canada. },
    DE = { cambium; cell lumen; outbreak; phenology; spruce budworm; stress; wallEOLEOLthickness },
    DI = { 10.1093/treephys/tpn044 },
    EM = { sergio.rossi@uqac.ca },
    FU = { Natural Sciences and Engineering Research Council ; Consortium deEOLEOLRecherche sur la Foret Boreale Commerciale and Fondation deEOLEOLl'Universite du Quebec a Chicoutimi },
    FX = { The work was funded by the Natural Sciences and Engineering ResearchEOLEOLCouncil. Consortium de Recherche sur la Foret Boreale Commerciale andEOLEOLFondation de l'Universite du Quebec a Chicoutimi. The authors thank J.EOLEOLAllaire C. Dc Zan. D. Gagnon, J.P. Lebeuf and S. Pedneault of technicalEOLEOLsupport and A. Garside for checking the English text. },
    GA = { 442OI },
    J9 = { TREE PHYSIOL },
    JI = { Tree Physiol. },
    KEYWORDS = { SPRUCE BUDWORM DEFOLIATION; GROWTH LOSS; CLIMATE-CHANGE; DOUGLAS-FIR; PLANTS; TREES; RECOVERY; OUTBREAK; STANDS; CARBOHYDRATE },
    LA = { English },
    NR = { 54 },
    OWNER = { sobru1 },
    PA = { GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND },
    PG = { 8 },
    PI = { OXFORD },
    PUBLISHER = { Oxford Univ Press },
    RP = { Rossi, S, Univ Quebec, Dept Sci Fondamentales, Chicoutimi, PQ, Canada. },
    SC = { Forestry },
    SN = { 0829-318X },
    TC = { 0 },
    TIMESTAMP = { 2009.06.23 },
    UT = { ISI:000265850100008 },
}

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