120
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Hidden shift of the ionome of plants exposed to elevated CO₂depletes minerals at the base of human nutrition.

      eLife
      crops, elevated CO2, human nutrition, ionome, iron, zinc

      Read this article at

          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Mineral malnutrition stemming from undiversified plant-based diets is a top global challenge. In C3 plants (e.g., rice, wheat), elevated concentrations of atmospheric carbon dioxide (eCO2) reduce protein and nitrogen concentrations, and can increase the total non-structural carbohydrates (TNC; mainly starch, sugars). However, contradictory findings have obscured the effect of eCO2 on the ionome-the mineral and trace-element composition-of plants. Consequently, CO2-induced shifts in plant quality have been ignored in the estimation of the impact of global change on humans. This study shows that eCO2 reduces the overall mineral concentrations (-8%, 95% confidence interval: -9.1 to -6.9, p<0.00001) and increases TNC:minerals > carbon:minerals in C3 plants. The meta-analysis of 7761 observations, including 2264 observations at state of the art FACE centers, covers 130 species/cultivars. The attained statistical power reveals that the shift is systemic and global. Its potential to exacerbate the prevalence of 'hidden hunger' and obesity is discussed.DOI: http://dx.doi.org/10.7554/eLife.02245.001.

          Related collections

          Most cited references148

          • Record: found
          • Abstract: found
          • Article: not found

          MORE EFFICIENT PLANTS: A Consequence of Rising Atmospheric CO2?

          The primary effect of the response of plants to rising atmospheric CO2 (Ca) is to increase resource use efficiency. Elevated Ca reduces stomatal conductance and transpiration and improves water use efficiency, and at the same time it stimulates higher rates of photosynthesis and increases light-use efficiency. Acclimation of photosynthesis during long-term exposure to elevated Ca reduces key enzymes of the photosynthetic carbon reduction cycle, and this increases nutrient use efficiency. Improved soil-water balance, increased carbon uptake in the shade, greater carbon to nitrogen ratio, and reduced nutrient quality for insect and animal grazers are all possibilities that have been observed in field studies of the effects of elevated Ca. These effects have major consequences for agriculture and native ecosystems in a world of rising atmospheric Ca and climate change.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Biofortification—A Sustainable Agricultural Strategy for Reducing Micronutrient Malnutrition in the Global South

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Impact of CO2fertilization on maximum foliage cover across the globe's warm, arid environments

                Bookmark

                Author and article information

                Journal
                24867639

                crops,elevated CO2,human nutrition,ionome,iron,zinc
                crops, elevated CO2, human nutrition, ionome, iron, zinc

                Comments

                Comment on this article