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Diurnal courses of net CO 2 assimilation, non-assimilatory processes, electron transport rate, photosystem (PS) II photochemical efficiency, and pigment composition were investigated during summer days for sun exposed needles of Norway spruce trees grown under ambient (AC) and/or elevated (EC; 700μmol (CO 2 ) mol −1 ) atmospheric carbon dioxide concentration ([CO 2 ...
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