Oriented structure of pectic polysaccharides in pea epidermal cell walls |
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Authors: | Hayashi, Ryuzo Morikawa, Hiromichi Nakajima, Norihiko Ichikawa, Yoshiaki Senda, Mitsugi |
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Affiliation: | Department of Agricultural Chemistry, Faculty of Agriculture, Kyoto University Kyoto 606, Japan |
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Abstract: | Polarized infrared absorption spectra of film specimens of theepidermal cell wall of the third internode of pea stems wererecorded before and after treatment with endopolygalacturonase(endo-PG) and endo-pectin lyase (endo-PL). The spectra showedthat the pectic polysaccharides solubilized with endo-PG wereessentially the same as those solubilized with endo-PL. Thedegree of esterification of the pectic polysaccharides was about20%, and their major sugar components were uronic acids (32.8%),arabinose (48.1%) and galactose (19.2%). The polarized infraredspectra showed that pectic polysaccharides have an orientedstructure in cell walls with their molecular chains orientedpreferentially parallel to the direction of cell elongation. 1Present address: Research and Development, Kanzaki Paper Mfg.Co., Ltd., Amagasaki, Hyogo 660, Japan.2Present address: Wakayama Research Laboratories, Kao Soap Co.,Ltd., Wakayama 640-91, Japan. (Received June 28, 1980; ) |
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