Molecular Analysis of Plant Plasma Membranes
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It has become clear that while rapid strides are now being made in the study of the structure and function of plant genomes, little is known in comparison to animal cells about the structure and function of the plant cell at the molecular level. For example, physiological and ultrastructural studies have shown that the plasma membrane is the site of a number of important cellular functions, including cellulose synthesis and wall deposition (16,19), hormone transport and action (8,21), transport of ions and metabolites (23), as well as recognition of, and response to, symbiotic and pathogenic microorganisms (3,14). However, despite its key role in plant cell division, differentiation, and development, investigation of the molecular properties of plant plasma membranes has been severely hampered by the lack of biochemical markers and attendant difficulties in membrane fractionation (10,11,20).
KeywordsMembrane Preparation Buoyant Density Arabinogalactan Protein Plant Plasma Membrane Hormone Transport
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