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- aggregation classification "A1".
- aggregation creator B384246.
- aggregation creator person.
- aggregation creator person.
- aggregation creator person.
- aggregation creator person.
- aggregation date "2010".
- aggregation format "application/pdf".
- aggregation hasFormat 1099708.bibtex.
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- aggregation hasFormat 1099708.doc.
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- aggregation isPartOf urn:issn:0300-3604.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Agriculture and Food Sciences".
- aggregation title "Seasonal variation of photosynthesis and photosynthetic efficiency in Phalaenopsis".
- aggregation abstract "Nowadays, a quest for efficient greenhouse heating strategies, and its related effects on the plant’s performance, exists. In this study, the effects of a combination of warm days and cool nights in autumn and spring on the photosynthetic activity and efficiency of Phalaenopsis were evaluated; the latter, being poorly characterised in CAM plants and, to our knowledge, not reported before in Phalaenopsis. 24-h CO2 flux measurements and chlorophyll fluorescence analysis were performed in both seasons on Phalaenopsis ‘Hercules’ exposed to relatively constant temperature regimes, 25.5/24.0°C (autumn) and 30/27°C (spring) respectively, and distinctive warm day/cool night temperature regimes, 27/20°C (autumn) and 36/24°C (spring), respectively. Cumulated leaf net CO2 uptake of the distinctive warm day/cool night temperature regimes declined with 10-16% as compared to the more constant temperature regimes, while the efficiency of carbon fixation revealed no substantial differences in both seasons. Nevertheless, a distinctive warm day/cool night temperature regime seemed to induce photorespiration. Although photorespiration is expected not to occur in CAM, the suppression of the leaf net CO2 exchange during Phase II and Phase IV as well as the slightly lower efficiency of carbon fixation for the distinctive warm day/cool night temperature regimes confirms the involvement of photorespiration in CAM. A seasonal effect was reflected in the leaf net CO2 exchange rate with considerably higher rates in spring. In addition, sufficiently high PAR levels in spring led to an efficiency of carbon fixation of 1.06-1.27% which is about twice as high than in autumn. As a result, only in the case where a net energy reduction between the temperature regimes compensates for the reduction in net CO2 uptake, warm day/cool night temperature regimes may be recommended as a practical sustainable alternative.".
- aggregation authorList BK694629.
- aggregation endPage "588".
- aggregation issue "4".
- aggregation startPage "580".
- aggregation volume "48".
- aggregation aggregates 1099721.
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- aggregation similarTo s11099-010-0075-7.
- aggregation similarTo LU-1099708.