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Genes Genet Syst. 1996 Oct;71(5):329-33.

Variability of mitochondrial subgenomic molecules in the meristematic cells of higher plants.

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Department of Plant Sciences, Graduate School of Science, University of Tokyo, Japan.


MtDNAs from BY-2 cells and rice root were analyzed by random amplified polymorphic DNA (RAPD) assay and Southern hybridization analysis. A number of differences were observed in the RAPD patterns amplified from mtDNAs sampled at different phases of the BY-2 cell culture. RAPD fragments also varied with the template DNAs derived from various areas of rice root tip. When a RAPD fragment was hybridized to restriction fragments of whole DNAs, isolated from the distal area of the apical meristem and differentiated elongation zone of a root, two distinct stoichiometric differences were observed in the hybridization signals. This suggests that the organization of mt-genome in prototypic cells in the root apical meristem differs from that found in the differentiated cells.

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