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Appl Environ Microbiol. 1985 September; 50(3): 717-720
Copyright © 1985, American Society for Microbiology. All Rights Reserved.

Rhizobium sp. Degradation of Legume Root Hair Cell Wall at the Site of Infection Thread Origin

Robert W. Ridge* and Barry G. Rolfe

Department of Genetics, The Research School of Biological Sciences, The Australian National University, Canberra City, A.C.T. 2601, Australia

ABSTRACT

Using a new microinoculation technique, we demonstrated that penetration of Rhizobium sp. into the host root hair cell occurs at 20 to 22 h after inoculation. It did this by dissolving the cell wall maxtrix, leaving a layer of depolymerized wall microfibrils. Colony growth pressure "stretched" the weakened wall, forming a bulge into an interfacial zone between the wall and plasmalemma. At the same time vesicular bodies, similar to plasmalemmasomes, accumulated at the penetration site in a manner which parallels host-pathogen systems.

FOOTNOTES

* Corresponding author.

Appl Environ Microbiol. 1985 September; 50(3): 717-720
Copyright © 1985, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

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  • Gage, D. J. (2004). Infection and Invasion of Roots by Symbiotic, Nitrogen-Fixing Rhizobia during Nodulation of Temperate Legumes. Microbiol. Mol. Biol. Rev. 68: 280-300 [Abstract] [Full Text]  
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