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Photosynthesis and Fructose 2,6-Bisphosphate Content in Water Stressed Wheat Leaves

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Summary

Net photosynthetic rates, sucrose levels, fructose 2,6-biphosphate content and the related enzyme activities were investigated in control and water stressed leaves of Triticum aestivum L. var sonalica. Fructose 2,6-bisphosphate accumulated in water stressed plants and reduced leaf photosynthesis, sucrose content and the activities of fructose 1,6-bisphosphatase and sucrose phosphate synthase. 14C-distribution into starch was more with increasing water stress while 14C-incorporation into sucrose was drastically reduced in stressed plants. Fructose-6-phosphate-2-kinase activity was extremely high in stressed plants while the activity of fructose 2,6-bisphosphatase was low. The results provide a clear evidence that low leaf water potentials result in fructose-2,6-bisphosphate accumulation, which modulates photosynthetic sucrose formation and carbon partitioning in wheat leaves.

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  1. School of Life Sciences, Pondicherry University, Pondicherry, 605 014, India

    A. Ramachandra Reddy

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  1. A. Ramachandra Reddy
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Reddy, A.R. Photosynthesis and Fructose 2,6-Bisphosphate Content in Water Stressed Wheat Leaves. CEREAL RESEARCH COMMUNICATIONS 28, 131–137 (2000). https://doi.org/10.1007/BF03543584

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  • DOI: https://doi.org/10.1007/BF03543584

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