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Related Experiment Videos

Is hexokinase really a sugar sensor in plants?

Halford1, Purcell, Hardie

  • 1IACR-Long Ashton Research Station, Dept of Agricultural Sciences, University of Bristol, Long Ashton, Bristol, UK BS41 9AF.

Trends in Plant Science
|May 14, 1999
PubMed
Summary

Plant cells

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ReplyellipsisThe sugar sensing story.

Trends in plant science·1999

Area of Science:

  • Plant biology
  • Molecular biology
  • Biochemistry

Background:

  • Plant cells possess intricate mechanisms for sensing external stimuli, including nutrient availability.
  • Understanding sugar sensing is crucial for regulating plant growth, metabolism, and development.
  • Current models often adapt yeast hexokinase roles, but their direct applicability to plants remains uncertain.

Purpose of the Study:

  • To critically evaluate the role of hexokinase as a primary sugar sensor in plant cells.
  • To investigate alternative or complementary mechanisms involved in plant sugar perception.
  • To clarify the molecular basis of sugar signaling in plants.

Main Methods:

  • Review of existing literature on sugar sensing in yeast and plants.
  • Analysis of experimental evidence supporting or refuting hexokinase's signaling function.
  • Comparative genomics and molecular pathway analysis.

Main Results:

  • Recent studies cast doubt on the conserved signaling role of hexokinase in yeast.
  • Direct experimental evidence for hexokinase's primary role in plant sugar sensing is currently lacking.
  • The precise molecular players in plant sugar perception remain largely unidentified.

Conclusions:

  • The hypothesis of hexokinase as a universal primary sugar sensor across eukaryotes, including plants, requires further rigorous investigation.
  • Alternative signaling pathways likely mediate sugar perception in plants.
  • Future research should focus on identifying plant-specific sugar sensors and their associated molecular mechanisms.

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