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Pineapple SWEET10 is a glucose transporter.

Beenish Fakher1,2, M Arif Ashraf3, Lulu Wang1,2

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Pineapple AcSWEET10 sugar transporter is functionally equivalent to its Arabidopsis counterpart, crucial for microspore development and potentially improving fruit crop yield.

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Biochemistry

Background:

  • SWEET transporters are essential for plant development and physiology.
  • SWEET transporter functions are well-studied in Arabidopsis but less so in pineapple.
  • Understanding pineapple SWEETs can enhance fruit crop productivity.

Purpose of the Study:

  • Investigate the substrate specificity of pineapple SWEET transporters.
  • Determine the function and conservation of pineapple AcSWEET10.
  • Explore the role of AcSWEET10 in microspore development and seed set.

Main Methods:

  • Genome-wide analysis and 3D structure comparison of SWEET homologs.
  • Functional complementation of yeast glucose transport mutants.
  • Analysis of AcSWEET10 expression and impact in transgenic Arabidopsis.

Main Results:

  • Pineapple AcSWEET10 shares sequence and structural similarities with Arabidopsis glucose transporters.
  • AcSWEET10 functionally complements glucose transport mutants.
  • AcSWEET10 regulates microspore formation via Callose synthase5 (CalS5) in transgenic Arabidopsis.

Conclusions:

  • AcSWEET10 is a glucose transporter functionally equivalent to Arabidopsis AtSWEET8.
  • AcSWEET10 plays a critical role in regulating microspore development in plants.
  • Manipulating SWEET transporter activity holds potential for improving fruit crop yield and quality.