Antioxidants in Photosynthesis and Human Nutrition

@article{DemmigAdams2002AntioxidantsIP,
  title={Antioxidants in Photosynthesis and Human Nutrition},
  author={Barbara Demmig‐Adams and William W Adams},
  journal={Science},
  year={2002},
  volume={298},
  pages={2149 - 2153}
}
The harnessing of solar energy by photosynthesis depends on a safety valve that effectively eliminates hazardous excess energy and prevents oxidative damage to the plant cells. Many of the compounds that protect plant cells also protect human cells. Improving plant resistance to stress may thus have the beneficial side effect of also improving the nutritional quality of plants in the human diet. The pathways that synthesize these compounds are becoming amenable to genetic manipulation, which… Expand
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References

SHOWING 1-10 OF 53 REFERENCES
The role of xanthophyll cycle carotenoids in the protection of photosynthesis
TLDR
Recent advances in the understanding of the photophysics, biochemical regulation and ecophysiology of this essential photoprotective process are reviewed. Expand
Photosynthesis: Harvesting sunlight safely
TLDR
This process is being dissected at the molecular level, and one group has identified a particular component in the light-harvesting apparatus that has a unique, energy-dissipating function. Expand
Overexpression of β-carotene hydroxylase enhances stress tolerance in Arabidopsis
TLDR
It is shown that in Arabidopsis thaliana overexpression of the chyB gene that encodes β-carotene hydroxylase—an enzyme in the zeaxanthin biosynthetic pathway—causes a specific twofold increase in the size of the xanthophyll cycle pool, which makes the plants more tolerant to conditions of high light and high temperature. Expand
Regulation of gene expression by reactive oxygen.
TLDR
This review examines the sources and generation of free radicals and oxidative stress in biological systems and the mechanisms used by reactive oxygen to modulate signal transduction cascades and redirect gene expression. Expand
Signal transduction in response to excess light: getting out of the chloroplast.
TLDR
Models of how signalling pathways could operate in acclimation to excess light, including components of photosynthetic electron transport chains, reactive oxygen species, redox-responsive protein kinases, thiol-regulated enzymes, chlorophyll precursors and chloroplast-envelope electron Transport chains all have roles are provided. Expand
The violaxanthin cycle protects plants from photooxidative damage by more than one mechanism.
  • M. Havaux, K. Niyogi
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1999
TLDR
It is demonstrated that the violaxanthin cycle specifically protects thylakoid membrane lipids against photooxidation, and part of this protection involves a mechanism other than quenching of singlet excited chlorophylls. Expand
Role of reactive oxygen species in the regulation of physiological functions.
  • K. Nose
  • Biology, Medicine
  • Biological & pharmaceutical bulletin
  • 2000
TLDR
This review will describe the biological relevance and essential roles of ROS in animal cells, focusing on signal transduction, gene expression, apoptosis and aging. Expand
A pigment-binding protein essential for regulation of photosynthetic light harvesting
TLDR
Results indicate that PsbS, an intrinsic chlorophyll-binding protein of photosystem II, is necessary for nonphotochemical quenching but not for efficient light harvesting and photosynthesis, a finding that has implications for the functional evolution of pigment-binding proteins. Expand
Oxidative stress and cell cycle checkpoint function.
TLDR
Several biologically important ROS and their sources are reviewed, the cell cycle, checkpoints, and current knowledge about the effects of ROS on initiating checkpoint responses are reviewed. Expand
Role of Antioxidant Lycopene in Cancer and Heart Disease
  • A. Rao, S. Agarwal
  • Biology, Medicine
  • Journal of the American College of Nutrition
  • 2000
TLDR
Evidence is accumulating to suggest other mechanisms such as modulation of intercellular gap junction communication, hormonal and immune system and metabolic pathways may also be involved in lycopene's role in human health and disease. Expand
...
1
2
3
4
5
...