Improving photosynthesis and crop productivity by accelerating recovery from photoprotection

Science. 2016 Nov 18;354(6314):857-861. doi: 10.1126/science.aai8878.

Abstract

Crop leaves in full sunlight dissipate damaging excess absorbed light energy as heat. When sunlit leaves are shaded by clouds or other leaves, this protective dissipation continues for many minutes and reduces photosynthesis. Calculations have shown that this could cost field crops up to 20% of their potential yield. Here, we describe the bioengineering of an accelerated response to natural shading events in Nicotiana (tobacco), resulting in increased leaf carbon dioxide uptake and plant dry matter productivity by about 15% in fluctuating light. Because the photoprotective mechanism that has been altered is common to all flowering plants and crops, the findings provide proof of concept for a route to obtaining a sustainable increase in productivity for food crops and a much-needed yield jump.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Arabidopsis Proteins / genetics
  • Arabidopsis Proteins / metabolism
  • Bioengineering
  • Carbon Dioxide / metabolism
  • Crops, Agricultural / genetics
  • Crops, Agricultural / growth & development*
  • Crops, Agricultural / metabolism
  • Crops, Agricultural / radiation effects
  • Darkness*
  • Light-Harvesting Protein Complexes / genetics
  • Light-Harvesting Protein Complexes / metabolism
  • Magnoliopsida / genetics
  • Magnoliopsida / growth & development
  • Magnoliopsida / metabolism
  • Magnoliopsida / radiation effects
  • Oxidoreductases / genetics
  • Oxidoreductases / metabolism
  • Photosynthesis*
  • Photosystem II Protein Complex / genetics
  • Photosystem II Protein Complex / metabolism
  • Plant Leaves / growth & development
  • Plant Leaves / metabolism
  • Plants, Genetically Modified / genetics
  • Plants, Genetically Modified / growth & development
  • Plants, Genetically Modified / metabolism
  • Plants, Genetically Modified / radiation effects
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Sunlight
  • Tobacco / genetics
  • Tobacco / growth & development*
  • Tobacco / metabolism
  • Tobacco / radiation effects

Substances

  • Arabidopsis Proteins
  • Light-Harvesting Protein Complexes
  • Photosystem II Protein Complex
  • RNA, Messenger
  • Carbon Dioxide
  • Oxidoreductases
  • violaxanthin de-epoxidase
  • zeaxanthin epoxidase