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 language | English |
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Pages (from-to) | 286-293 |
Number of pages | 8 |
Journal | Plant Cell Reports |
Volume | 22 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2003 Nov |
Keywords
- Cell wall protein
- Extensin
- Signal inducer
- Sugar
- Wound-induction
ASJC Scopus subject areas
- Agronomy and Crop Science
- Plant Science