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Subcellular structures of the root cap cells of hairy roots in astragalus membranaceus induced by infection of Agrobacterium rhizogenes

Yu Jing; Cen Yiqun;Jiang Rumin;Ni Dexiang(Fudan University)Rui Hekai(Shanghai Institute of Chinese Materia Medica)  
The hairy roots of Astragalus membranaceus were induced by an introduction of Agrobacterium rhizogenes pRi 15834, pGSGlucl. It was shown that no typical root cap had been developed and the changes of subcellular structures were as follows: random distribution of amyloplasts in the statocyst; only sER was present the cells but no rER was found; little secretion of Golgi apparatuses; no mucus formation between cell walls.The statocyst was thin-walled and formed nonsecretory cell similar to that of the meristematic and elongating regions. The root cap cells didn't fall off during growth, and no increase of cell layers was observed. We suggest that these changes are related to the high production of secondary metabolite of hairy roots.
【CateGory Index】: S567.230.3
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