In situ autumn ozone fumigation of mature Norway spruce - Effects on net photosynthesis

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Twelve cuvettes were installed on current year's twigs in the top of the canopy of a 35 years old Norway spruce stand in Denmark. From 10 to 16 hours, six of the cuvettes received 5-60 nl l(-1) ozone in addition to ambient air and six cuvettes received ambient air with a 40% reduced ozone concentration. The experiment was conducted during 70 days during the autumn. Our system could not detect any ozone effects on dark respiration, but eventually effects on dark respiration could be masked in signal noise. An inhibition of daily net photosynthesis in ozone treated shoots was apparent, and it is was found that a mean increase in ozone concentration of 10 nl l(-1) reduced net photosynthesis with 7.4 %. This effect should be related to a pre-exposure during the season of AOT40 12.5 mul l(-1) h.
    Original languageEnglish
    JournalPhyton. Annales Rei Botanicae
    Volume42
    Issue number3
    Pages (from-to)97-104
    ISSN0079-2047
    Publication statusPublished - 2002

    Cite this

    @article{d45c6832f73147aeb1318c1611438988,
    title = "In situ autumn ozone fumigation of mature Norway spruce - Effects on net photosynthesis",
    abstract = "Twelve cuvettes were installed on current year's twigs in the top of the canopy of a 35 years old Norway spruce stand in Denmark. From 10 to 16 hours, six of the cuvettes received 5-60 nl l(-1) ozone in addition to ambient air and six cuvettes received ambient air with a 40{\%} reduced ozone concentration. The experiment was conducted during 70 days during the autumn. Our system could not detect any ozone effects on dark respiration, but eventually effects on dark respiration could be masked in signal noise. An inhibition of daily net photosynthesis in ozone treated shoots was apparent, and it is was found that a mean increase in ozone concentration of 10 nl l(-1) reduced net photosynthesis with 7.4 {\%}. This effect should be related to a pre-exposure during the season of AOT40 12.5 mul l(-1) h.",
    keywords = "9-B risiko",
    author = "Mikkelsen, {Teis N{\o}rgaard} and H. Ro-Poulsen",
    year = "2002",
    language = "English",
    volume = "42",
    pages = "97--104",
    journal = "Phyton. Annales Rei Botanicae",
    issn = "0079-2047",
    publisher = "Verlag Berger",
    number = "3",

    }

    In situ autumn ozone fumigation of mature Norway spruce - Effects on net photosynthesis. / Mikkelsen, Teis Nørgaard; Ro-Poulsen, H.

    In: Phyton. Annales Rei Botanicae, Vol. 42, No. 3, 2002, p. 97-104.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - In situ autumn ozone fumigation of mature Norway spruce - Effects on net photosynthesis

    AU - Mikkelsen, Teis Nørgaard

    AU - Ro-Poulsen, H.

    PY - 2002

    Y1 - 2002

    N2 - Twelve cuvettes were installed on current year's twigs in the top of the canopy of a 35 years old Norway spruce stand in Denmark. From 10 to 16 hours, six of the cuvettes received 5-60 nl l(-1) ozone in addition to ambient air and six cuvettes received ambient air with a 40% reduced ozone concentration. The experiment was conducted during 70 days during the autumn. Our system could not detect any ozone effects on dark respiration, but eventually effects on dark respiration could be masked in signal noise. An inhibition of daily net photosynthesis in ozone treated shoots was apparent, and it is was found that a mean increase in ozone concentration of 10 nl l(-1) reduced net photosynthesis with 7.4 %. This effect should be related to a pre-exposure during the season of AOT40 12.5 mul l(-1) h.

    AB - Twelve cuvettes were installed on current year's twigs in the top of the canopy of a 35 years old Norway spruce stand in Denmark. From 10 to 16 hours, six of the cuvettes received 5-60 nl l(-1) ozone in addition to ambient air and six cuvettes received ambient air with a 40% reduced ozone concentration. The experiment was conducted during 70 days during the autumn. Our system could not detect any ozone effects on dark respiration, but eventually effects on dark respiration could be masked in signal noise. An inhibition of daily net photosynthesis in ozone treated shoots was apparent, and it is was found that a mean increase in ozone concentration of 10 nl l(-1) reduced net photosynthesis with 7.4 %. This effect should be related to a pre-exposure during the season of AOT40 12.5 mul l(-1) h.

    KW - 9-B risiko

    M3 - Journal article

    VL - 42

    SP - 97

    EP - 104

    JO - Phyton. Annales Rei Botanicae

    JF - Phyton. Annales Rei Botanicae

    SN - 0079-2047

    IS - 3

    ER -