Artificial Modification of Bordered Pits in Softwoods : (1) Treatment with Sodium Hydroxide Solution

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概要

• 論文の詳細を見る

• この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。The object of this study was to catch the state of dissolution or destruction of tori using sodium hydroxide solution. Fresh green samples of two conifer species, SUGI (Cryptomeria japonica D. DON) and KUROMATSU (finus thunbergii PARL.) were used, and each sample of species was classified into 3 groups and treated respectively by the different methods, that is, two drying methods (drying at 105℃ and air drying at room temperature) and FAA treatment known as a fixing one, and again treated respectively with sodium hydroxide solution of four different concentrations (1, 0.5, 0.25 and 0.125%). And then, from all these samples treated, small block specimens were prepared according to the electron microscope technique, and sections of about 2 p thickness were cut and observed under a phase contrast microscope. From the results of this experiment, it was indicated that there was a possibility of dissolving or removing tori without large modification of the morphological features of cell walls or pit borders, and it was known that even a dilute solution of sodium hydroxide such as 0.125% was also well available to dissolve the pectic material of tori, that the difference of concentration would be almost negligible within the limits of this experiment, and that no remarkable difference existed between the two drying treatments but only some general tendencies were recognized in the case of concentration differences and drying methods. As to SUGI wood, the comparatively remarkable effect of FAA was recognized, but similar result of FAA on KUROMATSU wood was not obtained. Then, the causes of balloon-like expansion of half-bordered pit membranes, and of curving pit borders in the direction to tracheid lumina were also discussed and presumed.

• 京都大学の論文
• 1972-01-31

著者

• Hayashi Shozo

  Division Of Wood Biology Wood Research Institute Kyoto University

• YOSHIMOTO Tadashi

  Division of Wood Biology, WOOD RESEARCH INSTITUTE, KYOTO UNIVERSITY

• KISHIMA Tsuneo

  Division of Wood Biology, WOOD RESEARCH INSTITUTE, KYOTO UNIVERSITY

• Kishima Tsuneo

  Division Of Wood Biology Wood Research Institute Kyoto University

• Kishima Tsuneo

  Division Of Wood Biology Wood Research Institute

• Yoshimoto Tadashi

  Division Of Wood Biology Wood Research Institute Kyoto University

関連論文

• Artificial Modification of Bordered Pits in Softwoods : (1) Treatment with Sodium Hydroxide Solution
• Formation of Perforation Plates and Bordered Pits in Differentiating Vessel Elements
• Isoquinoline Alkaloid Biosynthesis is Regulated by a Unique bHLH-Type Transcription Factor in Coptis japonica

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