| Abstract
| - A microfocus synchrotron wide-angle diffraction mapping experiment was used to analyzethe crystalline microstructure and the polymorphism of a series of C-starch granules from smooth pea.In these specimens that globally contained 60% of A-phase and 40% of the B-allomorph, it was foundthat the two phases were present in each granule. The A-allomorph was located essentially in the outerpart of the granules whereas the B-phase was found mostly at their center. In the A-component, thediffraction diagrams were always poorly oriented fiber patterns with the fiber axis systematically orientedtoward the center of the granule. On the other hand, in the B-center, only powder diagrams could beobserved whereas in middle zones of the granules, the B-component was much better oriented than theA-component.
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