| TITLE |
The sexual stage of Phytophthora polygoni Saw. |
| AUTHOR |
X.B. Zheng
Plant Pathogen Research Institute, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
H.H. Ho
Department of Biology, State University of New York, New Paltz, New York 12561, USA |
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| ABSTRACT |
The sexual stage of Phytophthora polygoni Saw.—which is distinguishable from other species of Phytophthora by its inability to grow on common agar media, its sporangial characteristics and its disease symptoms—has been successfully induced to form sexual organs in diseased leaves collected from the field or by artificial inoculation. The oogonia are smooth, spherical, thin-walled, (28.5-) 33 (-42) µm diam, with an aplerotic to markedly aplerotic, thick walled (3-4 µm) oospore, (24.7-) 28.1 (-32.3) µm diam, and a paragynous antheridium, 13-25 ?10-15 µm, attached laterally or apically to the oogonium. Interesting chlamydospore-like bodies were also observed. |
| KEYWORD |
China; Phytophthora polygoni; Rumex dentatus; Sex organs; |
| ARTICLE INFO |
Botanical Bulletin of Academia Sinica, Volume 41 Number 1 January 2000, page 57-60, 4 pages |
| PUBLISHER |
Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China |
