Rhizobium sp. Degradation of Legume Root Hair Cell Wall at the Site of Infection Thread Origin.
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.
Ridge
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RW
Department of Genetics, The Research School of Biological Sciences, The Australian National University, Canberra City, A.C.T. 2601, Australia.
Rolfe
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BG