Elevated sucrose-phosphate synthase activity in transgenic tobacco sustains photosynthesis in older leaves and alters development.

@article{Baxter2003ElevatedSS,
  title={Elevated sucrose-phosphate synthase activity in transgenic tobacco sustains photosynthesis in older leaves and alters development.},
  author={Charles J. Baxter and Christine Helen Foyer and Janice Turner and Stephen A Rolfe and William Paul Quick},
  journal={Journal of experimental botany},
  year={2003},
  volume={54 389},
  pages={
          1813-20
        }
}
Constitutive over-expression of a maize sucrose-phosphate synthase (SPS) gene in tobacco (Nicotiana tabacum) had major effects on leaf carbohydrate budgets with consequences for whole plant development. Transgenic tobacco plants flowered earlier and had greater flower numbers than wild-type plants. These changes were not linked to modified source leaf carbon assimilation or carbon export, although sucrose to starch ratios were significantly higher in leaves expressing the transgene. The… CONTINUE READING

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