Effect of Different Sugars on Photosynthesis and Chlorophyll Fluorescence in Photoautotrophic Tomato Suspension Cell Cultures |
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Authors: | Sinha A.K. Roitsch T. |
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Affiliation: | (1) Department of Crop and Soil Sciences, Cornell University, 1123 Bradfield Hall, Ithaca, NY 14853-1901, USA;(2) Department of Plant Biology, Cornell University, 217 Plant Science Building, Ithaca, NY 14853-1901, USA;(3) Department of Horticulture, Cornell University, 134A Plant Science Building, Ithaca, NY 14853-1901, USA |
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Abstract: | The effects of metabolisable sugars sucrose and glucose along with non-metabolisable isomers of sucrose palatinose and turanose were tested. Rate of oxygen evolution (P), electron transport rate (ETR), and photochemical quenching (qp) showed substantial decrease after 24 and 48 h by glucose and sucrose treatments, whereas there was no effect on all these parameters by the treatment with palatinose and turanose. Also the Fv/Fm ratio remained constant through the time of studies revealing that the maximal photochemical capacity of the cells was unchanged. Non-photochemical quenching (qN) showed a decrease compared to the control values by all the treatments. Hence P and Chl fluorescence parameter were affected only by those sugars which are used in the metabolic pathways and not by sugar analogues. |
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Keywords: | electron transport rate glucose Lycopersicon peruvianum oxygen evolution palatinose saccharose turanose |
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