Pythium glomeratum and Py. nodosum, two new records from China

Abstract

Two oomycetes, Pythium glomeratum and Py. nodosum were found in southern China, and they are newly recorded in China. These two species were both isolated from roots of soybean. Py. glomeratum is characterized by absence of zoosporangia and zoospores, and slow growth rate. And Py. nodosum is identified from other Pythium species by its smooth oogonia which are crowded with different antheridial branches making a complicated knot, and aplerotic oospores. Illustrations and descriptions of the two new records are provided based on the materials from China.