Effects of Nutrient Limitation and _γ-Irradiation on Tracheary Element Differentiation and Cell Division in Single Mesophyll Cells of Zinnia elegans

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概要

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• The effects of nutrient limitation and γ-irradiation on tracheary element differentiation and cell division were investigated using single cells isolated from the mesophyll of Zinnia elegans. When the phosphate concentration of the medium was reduced to 10 μM (1/50 of Fukuda and Komamine's medium, 1980a), the frequency of ceil division during 4 days of culture decreased, while the frequency of tracheary element differentiation was unaffected. γ-Irradiation with a dose of 92 Gy at 36 h of culture preferentially and thoroughly suppressed cell division without reducing the number of tracheary elements formed. The appearance of secondary cell wall thickenings was delayed by irradiation, but synchrony was maintained. Thus the Zinnia system previ-ously reported [Fukuda and Komamine (1980a) Plant Physiol. 65: 57] was improved to give a more useful system for the study of cytodifferentiation, in which tracheary element formation occurred from single cells without cell division.

• 日本植物生理学会の論文

著者

• Fukuda Hiroo

  Department Of Biological Sciences Graduate School Of Science The University Of Tokyo

• Fukuda H

  Univ. Tokyo Tokyo Jpn

• Sugiyama Munetaka

  Biological Institute Graduate School Of Science Tohoku University:(present)botanical Gardens Faculty

• Sugiyama Munetaka

  Botanical Gardens Graduate School Of Science University Of Tokyo

• Sugiyama M

  Biological Institute Graduate School Of Science Tohoku University:(present)botanical Gardens Faculty

• Sugiyama M

  Botanical Gardens Graduate School Of Science The University Of Tokyo

• Komamine A

  The Research Institute Of Evolutionary Biology

• Komamine Atsushi

  Biological Institute Faculty Of Science Tohoku University

• Sugiyama Munetaka

  Department of Botany, Faculty of Science, University of Tokyo

• Fukuda Hiroo

  Deparment Of Biological Sciences Graduate School Of Science The University Of Tokyo

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