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Molecular Analysis of Cellulose Biosynthesis in Arabidopsis

Tony Arioli, Liangcai Peng, Andreas S. Betzner, Joanne Burn, Werner Wittke, Werner Herth, Christine Camilleri, Herman Höfte, Jacek Plazinski, Rosemary Birch, Ann Cork, Julie Glover, John Redmond and Richard E. Williamson
Science
New Series, Vol. 279, No. 5351 (Jan. 30, 1998), pp. 717-720
Stable URL: http://www.jstor.org/stable/2894296
Page Count: 4
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Molecular Analysis of Cellulose Biosynthesis in Arabidopsis
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Abstract

Cellulose, an abundant, crystalline polysaccharide, is central to plant morphogenesis and to many industries. Chemical and ultrastructural analyses together with map-based cloning indicate that the RSW1 locus of Arabidopsis encodes the catalytic subunit of cellulose synthase. The cloned gene complements the rsw1 mutant whose temperature-sensitive allele is changed in one amino acid. The mutant allele causes a specific reduction in cellulose synthesis, accumulation of noncrystalline β-1,4-glucan, disassembly of cellulose synthase, and widespread morphological abnormalities. Microfibril crystallization may require proper assembly of the RSW1 gene product into synthase complexes whereas glucan biosynthesis per se does not.

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