Galactosidase of plant fibers with gelatinous cell wall: Identification and localization |
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Authors: | N E Mokshina N N Ibragimova V V Salnikov S I Amenitskii T A Gorshkova |
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Institution: | 1.Institute of Biochemistry and Biophysics, Kazan Research Center,Russian Academy of Sciences,Kazan,Russia |
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Abstract: | Using a comprehensive approach, we have identified a tissue-specific β-galactosidase from flax (Linum usitatissimum L.) phloem fibers forming a gelatinous cell wall. It was found that when fibers started to develop gelatinous cell wall,
β-galactosidase gene expression was enhanced.. Using the antibodies against β-galactosidase, we showed that the enzyme was
located in flax phloem fibers where it was detected together with tissue-specific galactan in secreted Golgi vesicles and
in gelatinous secondary cell wall. Similar β-galactosidase present in gelatinous cell wall of fibers was found in plants belonging
to various taxa and produced by different meristems; these data presume the identical mechanisms of gelatinous cell wall formation
and an important role of β-galactosidase. The role of this enzyme in developing the supramolecular structure of gelatinous
cell wall is discussed. |
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