2024-03-28T10:12:55Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/211162022-06-01T13:10:13Zcom_10261_53com_10261_6col_10261_306
Martínez-Carrasco, Rafael
Pérez Pérez, Pilar
Morcuende, Rosa
2005
Environmental and Experimental Botany, 2005. 54, 49-59.
0098-8472
10261/21116
10.1016/j.envexpbot.2004.05.004
The effects of increased CO2, temperature and nitrogen on leaf photosynthesis of
wheat were investigated in two field experiments under temperature gradient tunnels
in a Mediterranean environment. Ambient and 700 μmol mol-1 CO2, ambient and 4
ºC warmer temperatures, and 80 and 120 kg nitrogen ha-1 were compared. Although
rising CO2 concentrations increased photosynthesis, measurements at the same CO2
concentration showed decreased photosynthesis and stomatal conductance in plants
grown at elevated CO2. Elevated growth CO2 decreased photosynthesis for any given
value of intercellular CO2 concentration. Downward acclimation of photosynthesis
was decreased at temperatures 4 ºC above ambient and high nitrogen supply, under
both photorespiratory and non-photorespiratory measurement conditions. Growth in
elevated CO2 decreased the quantum yield of Photosystem II (PSII) electron
transport and the efficiency of energy capture by open PSII centres. At later stages of
leaf growth, warm temperatures decreased maximal photochemical efficiency (Fv/Fm) at
low, but not at high nitrogen supply. Fv/Fm increased with nitrogen application,
although the quantum yield of electron transport in the light remained unchanged.
eng
openAccess
Triticum aestivum
Chlorophyll fluorescence
Climate change
Elevated CO2
Elevated temperature
Nitrogen
Photosynthetic acclimation
Stomatal conductance
Rubisco
Interactive effects of elevated CO2, temperature and nitrogen on photosynthesis of wheat grown under temperature gradient tunnels.
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