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Multiple Mobile mRNA Signals Regulate Tuber Development in Potato.

David J Hannapel1, Anjan K Banerjee2

  • 1Plant Biology Major, 253 Horticulture Hall, Iowa State University, Ames, IA 50011-1100, USA. djh@iastate.edu.

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PubMed
Summary
This summary is machine-generated.

Potato plants use mobile messenger RNAs (mRNAs) to control tuber growth. Specific mRNAs moving through the phloem act as signals, with some promoting growth and others inhibiting it, demonstrating a complex regulatory system.

Keywords:
Solanum tuberosumStBELTALEphloemsignalstuberization

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Area of Science:

  • Plant biology
  • Molecular biology
  • Genetics

Background:

  • The sieve element system transports signals, including full-length mRNAs, for environmental response and development.
  • In potato, mobile mRNAs encoding transcription factors (TALE superfamily) move via phloem to regulate growth and tuber formation.

Purpose of the Study:

  • To investigate the role of mobile mRNAs in regulating potato growth and tuber development.
  • To identify specific mobile mRNAs involved in activating and repressing tuber formation.

Main Methods:

  • Analysis of phloem-mobile mRNAs in potato.
  • Identification of TALE superfamily transcription factors.
  • Study of RNA-binding proteins facilitating RNA transport.

Main Results:

  • Three mobile mRNAs (StBEL5, StBEL11, StBEL29) regulate potato growth and tuberization.
  • StBEL5 activates growth, while StBEL11 and StBEL29 antagonistically repress StBEL5 target genes.
  • RNA transport is enhanced by short-day conditions and polypyrimidine tract-binding proteins.

Conclusions:

  • Potato utilizes a long-distance signaling system with mobile mRNAs to control underground organ development.
  • Closely-linked, phloem-mobile mRNAs function as activators or repressors in a dynamic signaling pathway for tuber development.