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Related Experiment Video

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Engineering rice with lower grain arsenic.

Fenglin Deng1, Naoki Yamaji2, Jian Feng Ma2

  • 1Department of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, Pohang, Korea.

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|February 27, 2018
PubMed
Summary
This summary is machine-generated.

Transgenic rice plants were engineered to reduce arsenic accumulation in grains by enhancing vacuolar sequestration. This breakthrough technology significantly lowers arsenic in rice, a staple food, improving human health and mitigating arsenic toxicity.

Keywords:
ABC transporterarsenicricevacuolar sequestration

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Area of Science:

  • Agricultural Science
  • Biotechnology
  • Environmental Science

Background:

  • Arsenic (As) is a toxic element causing skin lesions and cancer in humans.
  • Rice (Oryza sativa L.) is a primary dietary source of arsenic, particularly in staple-consuming populations.
  • Reducing arsenic translocation into rice grains is crucial for mitigating human exposure.

Purpose of the Study:

  • To develop transgenic rice with enhanced vacuolar arsenic sequestration.
  • To inhibit arsenic translocation from roots to shoots and subsequently to grains.
  • To reduce overall arsenic accumulation in edible rice parts.

Main Methods:

  • Engineered rice plants to express vacuolar arsenic sequestration genes (ScYCF1, OsABCC1) under the RCc3 promoter.
  • Utilized a bacterial γ-glutamylcysteine synthetase driven by the maize UBI promoter.
  • Analyzed arsenic translocation in root, shoot, and grain tissues of transgenic and control plants.

Main Results:

  • Transgenic rice exhibited significantly reduced root-to-shoot and internode-to-grain arsenic translocation.
  • Arsenic accumulation in brown rice was reduced by up to 70%.
  • Agronomic traits of the transgenic rice plants were not compromised.

Conclusions:

  • Enhanced vacuolar arsenic sequestration effectively reduces arsenic in rice grains.
  • This biotechnological approach offers a viable strategy to lower dietary arsenic intake.
  • The technology holds potential for improving human health in arsenic-affected regions, especially in Southeast Asia.