Conifers, angiosperm trees, and lianas

Growth, whole-Plant water and nitrogen use efficiency, and stable isotope composition (?13C and ?18O) of seedlings grown in a tropical environment

Lucas Cernusak, K WINTER, J ARANDA, B TURNER

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Seedlings of several species of gymnosperm trees, angiosperm trees, and angiosperm lianas were grown under tropical field conditions in the Republic of Panama; physiological processes controlling plant C and water fluxes were assessed across this functionally diverse range of species. Relative growth rate, r, was primarily controlled by the ratio of leaf area to plant mass, of which specific leaf area was a key component. Instantaneous photosynthesis, when expressed on a leaf-mass basis, explained 69% of variation in r (P < 0.0001, n = 94). Mean r of angiosperms was significantly higher than that of the gymnosperms; within angiosperms, mean r of lianas was higher than that of trees. Whole-plant nitrogen use efficiency was also significantly higher in angiosperm than in gymnosperm species, and was primarily controlled by the rate of photosynthesis for a given amount of leaf nitrogen. Whole-plant water use efficiency, TEc, varied significantly among species, and was primarily controlled by ci/ca, the ratio of intercellular to ambient CO2 partial pressures during photosynthesis. Instantaneous measurements of ci/ca explained 51% of variation in TEc (P < 0.0001, n = 94). Whole-plant 13C discrimination also varied significantly as a function of ci/c a (R2 = 0.57, P < 0.0001, n = 94), and was, accordingly, a good predictor of TEc. The 18O enrichment of stem dry matter was primarily controlled by the predicted 18O enrichment of evaporative sites within leaves (R2 = 0.61, P < 0.0001, n = 94), with some residual variation explained by mean transpiration rate. Measurements of carbon and oxygen stable isotope ratios could provide a useful means of parameterizing physiological models of tropical forest trees. � 2008 American Society of Plant Biologists.
    Original languageEnglish
    Pages (from-to)642-659
    Number of pages18
    JournalPlant Physiology
    Volume148
    Issue number1
    Publication statusPublished - 2008

    Fingerprint

    Coniferophyta
    Angiosperms
    lianas
    nutrient use efficiency
    Seedlings
    Isotopes
    conifers
    water use efficiency
    stable isotopes
    Gymnosperms
    Angiospermae
    Nitrogen
    Photosynthesis
    seedlings
    Water
    Growth
    photosynthesis
    Oxygen Isotopes
    Plant Physiological Phenomena
    Panama

    Cite this

    @article{9fdb97a2fb154517b6ebb9c677a98549,
    title = "Conifers, angiosperm trees, and lianas: Growth, whole-Plant water and nitrogen use efficiency, and stable isotope composition (?13C and ?18O) of seedlings grown in a tropical environment",
    abstract = "Seedlings of several species of gymnosperm trees, angiosperm trees, and angiosperm lianas were grown under tropical field conditions in the Republic of Panama; physiological processes controlling plant C and water fluxes were assessed across this functionally diverse range of species. Relative growth rate, r, was primarily controlled by the ratio of leaf area to plant mass, of which specific leaf area was a key component. Instantaneous photosynthesis, when expressed on a leaf-mass basis, explained 69{\%} of variation in r (P < 0.0001, n = 94). Mean r of angiosperms was significantly higher than that of the gymnosperms; within angiosperms, mean r of lianas was higher than that of trees. Whole-plant nitrogen use efficiency was also significantly higher in angiosperm than in gymnosperm species, and was primarily controlled by the rate of photosynthesis for a given amount of leaf nitrogen. Whole-plant water use efficiency, TEc, varied significantly among species, and was primarily controlled by ci/ca, the ratio of intercellular to ambient CO2 partial pressures during photosynthesis. Instantaneous measurements of ci/ca explained 51{\%} of variation in TEc (P < 0.0001, n = 94). Whole-plant 13C discrimination also varied significantly as a function of ci/c a (R2 = 0.57, P < 0.0001, n = 94), and was, accordingly, a good predictor of TEc. The 18O enrichment of stem dry matter was primarily controlled by the predicted 18O enrichment of evaporative sites within leaves (R2 = 0.61, P < 0.0001, n = 94), with some residual variation explained by mean transpiration rate. Measurements of carbon and oxygen stable isotope ratios could provide a useful means of parameterizing physiological models of tropical forest trees. � 2008 American Society of Plant Biologists.",
    keywords = "Coniferophyta, Gymnospermae, Magnoliophyta, carbon, nitrogen, oxygen, water, angiosperm, article, biological model, conifer, ecosystem, evapotranspiration, growth, development and aging, metabolism, photosynthesis, seedling, tree, tropic climate, Angiosperms, Carbon, Carbon Isotopes, Ecosystem, Models, Biological, Nitrogen, Oxygen Isotopes, Photosynthesis, Plant Transpiration, Seedling, Trees, Tropical Climate, Water",
    author = "Lucas Cernusak and K WINTER and J ARANDA and B TURNER",
    year = "2008",
    language = "English",
    volume = "148",
    pages = "642--659",
    journal = "Plant Physiology",
    issn = "0032-0889",
    publisher = "American Society of Plant Biologists (ASPB)",
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    Conifers, angiosperm trees, and lianas : Growth, whole-Plant water and nitrogen use efficiency, and stable isotope composition (?13C and ?18O) of seedlings grown in a tropical environment. / Cernusak, Lucas; WINTER, K; ARANDA, J; TURNER, B.

    In: Plant Physiology, Vol. 148, No. 1, 2008, p. 642-659.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Conifers, angiosperm trees, and lianas

    T2 - Growth, whole-Plant water and nitrogen use efficiency, and stable isotope composition (?13C and ?18O) of seedlings grown in a tropical environment

    AU - Cernusak, Lucas

    AU - WINTER, K

    AU - ARANDA, J

    AU - TURNER, B

    PY - 2008

    Y1 - 2008

    N2 - Seedlings of several species of gymnosperm trees, angiosperm trees, and angiosperm lianas were grown under tropical field conditions in the Republic of Panama; physiological processes controlling plant C and water fluxes were assessed across this functionally diverse range of species. Relative growth rate, r, was primarily controlled by the ratio of leaf area to plant mass, of which specific leaf area was a key component. Instantaneous photosynthesis, when expressed on a leaf-mass basis, explained 69% of variation in r (P < 0.0001, n = 94). Mean r of angiosperms was significantly higher than that of the gymnosperms; within angiosperms, mean r of lianas was higher than that of trees. Whole-plant nitrogen use efficiency was also significantly higher in angiosperm than in gymnosperm species, and was primarily controlled by the rate of photosynthesis for a given amount of leaf nitrogen. Whole-plant water use efficiency, TEc, varied significantly among species, and was primarily controlled by ci/ca, the ratio of intercellular to ambient CO2 partial pressures during photosynthesis. Instantaneous measurements of ci/ca explained 51% of variation in TEc (P < 0.0001, n = 94). Whole-plant 13C discrimination also varied significantly as a function of ci/c a (R2 = 0.57, P < 0.0001, n = 94), and was, accordingly, a good predictor of TEc. The 18O enrichment of stem dry matter was primarily controlled by the predicted 18O enrichment of evaporative sites within leaves (R2 = 0.61, P < 0.0001, n = 94), with some residual variation explained by mean transpiration rate. Measurements of carbon and oxygen stable isotope ratios could provide a useful means of parameterizing physiological models of tropical forest trees. � 2008 American Society of Plant Biologists.

    AB - Seedlings of several species of gymnosperm trees, angiosperm trees, and angiosperm lianas were grown under tropical field conditions in the Republic of Panama; physiological processes controlling plant C and water fluxes were assessed across this functionally diverse range of species. Relative growth rate, r, was primarily controlled by the ratio of leaf area to plant mass, of which specific leaf area was a key component. Instantaneous photosynthesis, when expressed on a leaf-mass basis, explained 69% of variation in r (P < 0.0001, n = 94). Mean r of angiosperms was significantly higher than that of the gymnosperms; within angiosperms, mean r of lianas was higher than that of trees. Whole-plant nitrogen use efficiency was also significantly higher in angiosperm than in gymnosperm species, and was primarily controlled by the rate of photosynthesis for a given amount of leaf nitrogen. Whole-plant water use efficiency, TEc, varied significantly among species, and was primarily controlled by ci/ca, the ratio of intercellular to ambient CO2 partial pressures during photosynthesis. Instantaneous measurements of ci/ca explained 51% of variation in TEc (P < 0.0001, n = 94). Whole-plant 13C discrimination also varied significantly as a function of ci/c a (R2 = 0.57, P < 0.0001, n = 94), and was, accordingly, a good predictor of TEc. The 18O enrichment of stem dry matter was primarily controlled by the predicted 18O enrichment of evaporative sites within leaves (R2 = 0.61, P < 0.0001, n = 94), with some residual variation explained by mean transpiration rate. Measurements of carbon and oxygen stable isotope ratios could provide a useful means of parameterizing physiological models of tropical forest trees. � 2008 American Society of Plant Biologists.

    KW - Coniferophyta

    KW - Gymnospermae

    KW - Magnoliophyta

    KW - carbon

    KW - nitrogen

    KW - oxygen

    KW - water

    KW - angiosperm

    KW - article

    KW - biological model

    KW - conifer

    KW - ecosystem

    KW - evapotranspiration

    KW - growth, development and aging

    KW - metabolism

    KW - photosynthesis

    KW - seedling

    KW - tree

    KW - tropic climate

    KW - Angiosperms

    KW - Carbon

    KW - Carbon Isotopes

    KW - Ecosystem

    KW - Models, Biological

    KW - Nitrogen

    KW - Oxygen Isotopes

    KW - Photosynthesis

    KW - Plant Transpiration

    KW - Seedling

    KW - Trees

    KW - Tropical Climate

    KW - Water

    M3 - Article

    VL - 148

    SP - 642

    EP - 659

    JO - Plant Physiology

    JF - Plant Physiology

    SN - 0032-0889

    IS - 1

    ER -