Sugar acts as a regulatory signal on the wound-inducible expression of SbHRGP3::GUS in transgenic plants

J. H. Ahn, J. S. Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

SbHRGP3 encodes an HRGP whose expression is correlated with the cessation of root elongation in soybean. The wound-inducible expression of SbHRGP3 interestingly requires sucrose although wounding alone induces the expression of many HRGP genes. To examine whether sugar serves as a specific signal on the wound-inducible expression or whether sugar is required to provide ATP, we examined SbHRGP3::GUS expression in transgenic tobacco plants. Various oligosaccharides including non-metabolizable sugar induced SbHRGP3::GUS expression in transgenic plants. The inhibitors of photosynthesis and of cellular respiration did not affect the wound-inducible expression of SbHRGP3::GUS. However, the induction was significantly affected by PCMBS, an inhibitor of active apoplastic phloem loading of sucrose, suggesting that SbHRGP3::GUS expression in phloem tissues requires translocated sucrose. We therefore propose that sugar acts as a specific regulatory signal on the wound-inducible expression of SbHRGP3, rather than acting as a simple provider of ATP.

Original languageEnglish
Pages (from-to)286-293
Number of pages8
JournalPlant Cell Reports
Volume22
Issue number4
DOIs
Publication statusPublished - 2003 Nov

Keywords

  • Cell wall protein
  • Extensin
  • Signal inducer
  • Sugar
  • Wound-induction

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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