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.
Russian Journal of Plant Physiology – Springer Journals
Published: Feb 26, 2012
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