Ectopic expression of Expansin3 or Expansinbeta1 causes enhanced hormone and salt stress sensitivity in Arabidopsis

Biotechnol Lett. 2008 Jul;30(7):1281-8. doi: 10.1007/s10529-008-9678-5. Epub 2008 Mar 4.


Expansins are cell wall loosening proteins that appear to permit the microfibril matrix network to slide in growing plant cell walls, thereby enabling the wall to expand. To scrutinize possible impacts on plant growth and development when expansins are over-expressed, we characterized phenotypic alterations of the transgenic plants that constitutively expressed AtEXP3 or AtEXP-beta1 under control of 35S-CaMV promoter. Our results suggest that both AtEXP3-OX and AtXPbeta1-OX are very sensitive to salt stress. However, the mechanisms underlying their enhanced salt sensitivity appear to be different.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Arabidopsis / genetics*
  • Arabidopsis / growth & development*
  • Cell Wall / genetics
  • Cell Wall / metabolism*
  • Gene Expression*
  • Plant Proteins / biosynthesis*
  • Plant Proteins / genetics
  • Plants, Genetically Modified / genetics*
  • Plants, Genetically Modified / growth & development*
  • Salts / pharmacology*


  • Plant Proteins
  • Salts
  • expansin protein, plant