| morphological comparison of isolates of phakopsora pachyrhizi from different areas of the world. | isolates of phakopsora pachyrhizi from australia, indian, the philippines, taiwan, and puerto rico were compared with respect to morphology and development of "wayne" soybean. the most extensive comparisons were made between the puerto rican and taiwanese isolates; these were indistinguishable in their prepenetration, penetration, and early colonization phases. examination of uredia of all isolates by light and scanning electron microscopy (sem) revealed no differences in uredial morphology. all ... | 1980 | 7195296 |