Improving the nutritional value of Golden Rice through increased pro-vitamin A content

  title={Improving the nutritional value of Golden Rice through increased pro-vitamin A content},
  author={J. A. Paine and C. A. Shipton and S. Chaggar and R. Howells and M. Kennedy and Gareth Vernon and S. Wright and E. Hinchliffe and J. Adams and A. Silverstone and R. Drake},
  journal={Nature Biotechnology},
  • J. A. Paine, C. A. Shipton, +8 authors R. Drake
  • Published 2005
  • Biology, Medicine
  • Nature Biotechnology
  • 'Golden Rice' is a variety of rice engineered to produce β-carotene (pro-vitamin A) to help combat vitamin A deficiency, and it has been predicted that its contribution to alleviating vitamin A deficiency would be substantially improved through even higher β-carotene content. We hypothesized that the daffodil gene encoding phytoene synthase (psy), one of the two genes used to develop Golden Rice, was the limiting step in β-carotene accumulation. Through systematic testing of other plant psys, we identified a psy from maize that substantially increased carotenoid accumulation in a model plant system. [...] Key Method We went on to develop 'Golden Rice 2' introducing this psy in combination with the Erwinia uredovora carotene desaturase (crtI) used to generate the original Golden Rice. We observed an increase in total carotenoids of up to 23-fold (maximum 37 μg/g) compared to the original Golden Rice and a preferential accumulation of β-carotene.Expand Abstract
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