GaucherDizengremelMauffetteEtAl2005

Référence

Gaucher, C., Dizengremel, P., Mauffette, Y. and Chevrier, N. (2005) Response of Acer saccharum seedlings to elevated O3 and CO2 concentrations. Phytoprotection, 86(1):7-17.

Résumé

The effects of three times ambient [O3] (3x) and high [CO 2] (650 ?L L-1) alone and in combination were studied on 2-yr-old sugar maple (Acer saccharum) seedlings for 86 days in open top chambers. Sugar maple net CO2 assimilation rate and growth were not decreased by the O3 treatment after one growing season, and the epicuticular wax was not damaged compared with the control. The absence of response to the O3 treatment is attributable to the low stomatal conductance of this species resulting in a low O3 uptake, together with the succession of periods of high and low [O3], which allowed the seedlings to alleviate the oxidative stress. At the end of August, under high [CO2], the growth of the seedlings and net CO2 assimilation to stomatal conductance to CO2 ratio in the second flush of leaves had doubled. Under the environmental growth conditions of the chambers (high light, nutrients and water availabilities), the seedlings may benefit from the availability of CO2. Sugar maple seedlings may have a competitive growth advantage under elevated CO2 conditions and three times ambient [O3] did not decreased the fertilizing effect of CO2.

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@ARTICLE { GaucherDizengremelMauffetteEtAl2005,
    AUTHOR = { Gaucher, C. and Dizengremel, P. and Mauffette, Y. and Chevrier, N. },
    TITLE = { Response of Acer saccharum seedlings to elevated O3 and CO2 concentrations },
    JOURNAL = { Phytoprotection },
    YEAR = { 2005 },
    VOLUME = { 86 },
    PAGES = { 7-17 },
    NUMBER = { 1 },
    NOTE = { 00319511 (ISSN) Export Date: 25 April 2007 Source: Scopus CODEN: PYTPA Language of Original Document: English Correspondence Address: Gaucher, C.; De?partement des Sciences Biologiques; Universite? du Que?bec A? Montre?al; C.P. 8888, Succ. Centre-ville Montre?al, Que. H3C 3P8, Canada; email: gaucherc@sympatico.ca References: Barnes, J.D., Davison, A.W., Booth, T.A., Ozone accelerates structural degradation of epicuticular wax on Norway spruce needles (1988) New Phytol., 110, pp. 309-318; Bazzaz, F.A., The response of natural ecosystems to the rising global CO2 levels (1992) Annu. Rev. Ecol. Syst., 21, pp. 167-196; Bazzaz, F.A., Coleman, J.S., Morse, S.R., Growth responses of seven major co-occurring tree species of the north-eastern United States to elevated CO2 (1990) Can. J. For. 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    ABSTRACT = { The effects of three times ambient [O3] (3x) and high [CO 2] (650 ?L L-1) alone and in combination were studied on 2-yr-old sugar maple (Acer saccharum) seedlings for 86 days in open top chambers. Sugar maple net CO2 assimilation rate and growth were not decreased by the O3 treatment after one growing season, and the epicuticular wax was not damaged compared with the control. The absence of response to the O3 treatment is attributable to the low stomatal conductance of this species resulting in a low O3 uptake, together with the succession of periods of high and low [O3], which allowed the seedlings to alleviate the oxidative stress. At the end of August, under high [CO2], the growth of the seedlings and net CO2 assimilation to stomatal conductance to CO2 ratio in the second flush of leaves had doubled. Under the environmental growth conditions of the chambers (high light, nutrients and water availabilities), the seedlings may benefit from the availability of CO2. Sugar maple seedlings may have a competitive growth advantage under elevated CO2 conditions and three times ambient [O3] did not decreased the fertilizing effect of CO2. },
    KEYWORDS = { CO2 assimilation Elevated CO2 Elevated O3 Epicuticular wax Growth Sugar maple Acer Acer saccharum Saccharum hybrid cultivar },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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