Further Evidence for Inactivation of Fructose-1,6-bisphosphatase at the Beginning of SO2 Fumigation. Increase in Fructose-1,6-bisphosphate and Decrease in Fructose-6-phosphate in SO2-Fumigated Spinach Leaves |
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| Authors: | Tanaka Kiyoshi; Mitsuhashi Hiromi; Kondo Noriaki; Sugahara Kiyoshi |
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| Institution: | 1Division of Environmental Biology, National Institute for Environmental Studies Yatabe, Ibaraki 305, Japan
2Department of Environmental Chemistry, Faculty of Science, Toho University Funahashi, Chiba 274, Japan |
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| Abstract: | The substrate level of the photosynthetic reductive pentosephosphate cycle in spinach leaves during SO2 fumigation wassurveyed. At the beginning of SO2 fumigation, fructose-1,6-bisphosphateincreased and fructose-6-phosphate decreased, while ribulose-1,5-bisphosphateremained unchanged and 3-phosphoglyceric acid rapidly decreased.These results suggested that the inhibition of photosynthesisin spinach leaves with SO2 might be due to inactivation of fructose-1,6-bisphosphatase. (Received May 26, 1982; Accepted September 27, 1982) |
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