Non-linear mixed-effects modeling for photosynhetic response of Rosa hybrida L. under elevated CO2 in greenhouses - short communication
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Non-linear mixed-effects modeling for photosynhetic response of Rosa hybrida L. under elevated CO2 in greenhouses - short communication. / Ozturk, I.; Ottosen, C.O.; Ritz, Christian; Streibig, Jens Carl.
I: Horticultural Science, Bind 38, Nr. 1, 2011, s. 43-47.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Non-linear mixed-effects modeling for photosynhetic response of Rosa hybrida L. under elevated CO2 in greenhouses - short communication
AU - Ozturk, I.
AU - Ottosen, C.O.
AU - Ritz, Christian
AU - Streibig, Jens Carl
PY - 2011
Y1 - 2011
N2 - Photosynthetic response to light was measured on the leaves of two cultivars of Rosa hybrida L. (Escimo and Mercedes) in the greenhouse to obtain light-response curves and their parameters. Th e aim was to use a model to simulate leaf photosynthetic carbon gain with respect to environmental conditions. Leaf gas exchanges were measured at 11 light intensities from 0 to 1,400 µmol/m2s, at 800 ppm CO2, 25°C, and 65 ± 5% relative humidity. In order to describe the data corresponding to diff erent measurement dates, the non-linear mixed-eff ects regression analysis was used. Th e model successfully described the photosynthetic responses. Th e analysis indicated signifi cant diff erences in light saturated photosynthetic rates and in light compensation points. Th e cultivar with the lower light compensation points (Escimo) maintained a higher carbon gain despite its lower (but not-signifi cant) quantum effi ciency. Th e results suggested acclimation response, as carbon assimilation rates and stomatal conductance at each measurement date were higher for Escimo than Mercedes. Diff erences in photosynthesis rates were attributed to the adaptive capacity of the cultivars to light conditions at a specifi c day when the experiments were undertaken.
AB - Photosynthetic response to light was measured on the leaves of two cultivars of Rosa hybrida L. (Escimo and Mercedes) in the greenhouse to obtain light-response curves and their parameters. Th e aim was to use a model to simulate leaf photosynthetic carbon gain with respect to environmental conditions. Leaf gas exchanges were measured at 11 light intensities from 0 to 1,400 µmol/m2s, at 800 ppm CO2, 25°C, and 65 ± 5% relative humidity. In order to describe the data corresponding to diff erent measurement dates, the non-linear mixed-eff ects regression analysis was used. Th e model successfully described the photosynthetic responses. Th e analysis indicated signifi cant diff erences in light saturated photosynthetic rates and in light compensation points. Th e cultivar with the lower light compensation points (Escimo) maintained a higher carbon gain despite its lower (but not-signifi cant) quantum effi ciency. Th e results suggested acclimation response, as carbon assimilation rates and stomatal conductance at each measurement date were higher for Escimo than Mercedes. Diff erences in photosynthesis rates were attributed to the adaptive capacity of the cultivars to light conditions at a specifi c day when the experiments were undertaken.
KW - BRIC
KW - miniature rose
KW - irradiance
KW - response curve
KW - carbon assimilation
M3 - Journal article
VL - 38
SP - 43
EP - 47
JO - Horticultural Science
JF - Horticultural Science
SN - 0862-867X
IS - 1
ER -
ID: 33730925