title: Rhizobium sp. Degradation of Legume Root Hair Cell Wall at the Site of Infection Thread Origin.
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.
authors.affiliation: Department of Genetics, The Research School of Biological Sciences, The Australian National University, Canberra City, A.C.T. 2601, Australia.
authors.forename: R W
authors.initials: RW
authors.lastname: Ridge
authors.forename: B G
authors.initials: BG
authors.lastname: Rolfe