Reference Report for IND89041635
| Title: | The systematics of Phytophthora sojae and P. megasperma. |
| Authors: | Faris, M.A., Sabo, F.E., Barr, D.J.S., Lin, C.S. |
| Source: | Can. J. Botany 1989, 67(5):1442-1447 |
| Abstract: | Isolates of Phytophthora from alfalfa and soybean and the type isolate of Phytophthora megasperma Drechsler from hollyhock were compared morphologically, for temperature response, and pathogenically. Highly pathogenic, host-specific isolates from soybean and alfalfa, with relatively small oogonia, were identified as P. sojae Kaufmann and Gerdemann and divided into two formae speciales: f.sp. glycines and f.sp. medicaginis, respectively. Less pathogenic isolates from alfalfa with large oogonia were identified as P. megasperma and were compared favorably with Drechsler's original isolate and description. Isolates of P. sojae differed in their cardinal temperatures from those of P. megasperma. We consider P. sojae to be distinct from P. megasperma and propose that this taxon be reintroduced to the literature. |
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