Changes Induced by Low Oxygen Concentration in Photosynthetic and Respiratory CO2 Exchange in Phosphate-Deficient Bean Leaves |
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Authors: | S Maleszewski I Ciereszko A Skowrońska E Mieczejko B Kozłowska-Szerenos |
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Institution: | (1) Institute of Biology, University of Biaystok, wierkowa, 20B, PL-15950 Biaystok, Poland, e-mail |
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Abstract: | Effect of phosphorus deficiency on photosynthetic and respiratory CO2 exchanges were analysed in primary leaves of 2-week-old bean (Phaseolus vulgaris L. cv. Golden Saxa) plants under non-photorespiratory (2 % O2) and photorespiratory (21 % O2) conditions. Low P decreased maximum net photosynthetic rate (PNmax) and increased the time necessary to reach it. In the leaves of P-deficient plants the relative decrease of PNmax at 2 % O2 was larger than at 21 % O2. The results suggested the influence of photorespiration in the cellular turnover of phosphates. |
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Keywords: | mannose net photosynthetic rate Phaseolus vulgaris photorespiration rate |
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