Self-sterile isolates of Pythium mate with self-fertile isolates of Pythium ultimum

LITERATURE CITED

• Ali, M. S. A. M. 1985. Pythium populations in Middle Eastern soils relative to different cropping practices. Trans. Brit. Mycol. Soc. 84: 695–700.
   Google Scholar
• Barksdale, A. W. 1960. Inter-thallic sexual reactions in Achlya, a genus of the aquatic fungi. Amer. J. Bot. 47: 14–23.
   Web of Science ®Google Scholar
• Böttcher, I., and L. Behr. 1985. Untersuchungen zum Vorkommen von Pythium spp. im Boden. I. Die Isolation von Pythium-Arten, ihre Differenzierung nach makroskopischen Merkmalen und ihre Bestimmung. Phytopathol. Z. 112: 333–343.
   Google Scholar
• Campbell, W. A., and F. F. Hendrix, Jr. 1967. A new heterothallic Pythium from southern United States. Mycologia 59: 274–278.
   Web of Science ®Google Scholar
• Campbell, W. A., and F. F. Hendrix, Jr., and B. Sleeth. 1946. Variability of Pythium ultimum from guayule. Mycologia 38: 24–39.
   Google Scholar
• Couch, J. N. 1932. The development of the sexual organs in Leptolegnia caudata. Amer. J. Bot. 19: 584–599.
   Google Scholar
• Dennett, C. W., and M. E. Stanghellini. 1977. Genetic and cytological evidence for a diploid life cycle in Pythium aphanidermatum. Phytopathology 67: 1134–1141.
   Web of Science ®Google Scholar
• Dick, M. W. 1976. The ecology of freshwater aquatic phycomycetes. Pp. 513–542. In: Recent advances in aquatic mycology. Ed., E. B. Gareth Jones. Paul Elek, London, United Kingdom.
   Google Scholar
• Dick, M. W.. 1990. Keys to Pythium. M. W. Dick, Reading, Great Britain. 64 pp.
   Google Scholar
• Dick, M. W., and M.S. Ali-Shtayeh. 1986. Distribution and frequency of Pythium in parkland and farmland soils. Trans. Brit. Mycol. Soc. 86: 49–62.
   Google Scholar
• Francis, D. M., and D. A. St. Clair. 1993. Outcrossing in the homothallic oomycete, Pythium ultimum, detected with molecular markers. Curr. Genet. 24: 100–106.
   PubMed Web of Science ®Google Scholar
• Hall, R. 1983. Pythium root rot of white bean in Ontario. Canad. J. Pl. Pathol. 5: 239–244.
   Google Scholar
• Hardman, J. M., and M. W. Dick. 1987. Short-term fluctuations in availability of Pythium propagules for isolation from soil. Trans. Brit. Mycol. Soc. 88: 29–39.
   Google Scholar
• Khew, K. L., and G. A. Zentmyer. 1973. Chemotactic response of zoospores of five species of Phytophthora. Phytopathology 63: 1511–1517.
   Web of Science ®Google Scholar
• Krüger, F. 1910. Beitrag zur Kenntnis der Kernverhältnisse von Albugo candida und Peronospora ficariae. Zentralbl. Bakteriol. Parasitenk. Infektionskrankh. Hyg., 2 Abt. 27: 186–205.
   Google Scholar
• Kryweinczyk, J., and C. E. Dorworth. 1980. Serological relationships of some fungi of the genus Pythium. Canad. J. Bot. 58: 1412–1417.
   Google Scholar
• LéJohn, H. B. 1971. Enzyme regulation, lysine pathways and cell wall structures as indicators of major lines of evolution in fungi. Nature 231: 164–168.
   PubMed Web of Science ®Google Scholar
• Lifshitz, R., B. Sneh, and R. Baker. 1984. Soil suppressiveness to a plant pathogenic Pythium species. Phytopathology 74: 1054–1061.
   Google Scholar
• Lumsden, R. D., and W. A. Ayers. 1975. Influence of soil environment on the germinability of constitutively dormant oospores of Pythium ultimum. Phytopathology 65: 1101–1107.
   Web of Science ®Google Scholar
• Lumsden, R. D., W. A. Ayers, P. B. Adams, R. L. Dow, J. A. Lewis, G. C. Papavizas, and J. G. Kantzas. 1976. Ecology and epidemeology of Pythium species in field soil. Phytopathology 66: 1203–1209.
   Web of Science ®Google Scholar
• Martin, F. N. 1990. Taxonomic classification of asexual isolates of Pythium ultimum based on cultural characteristics and mitochondrial DNA restriction patterns. Exp. Mycol. 14: 47–56.
   Google Scholar
• Martin, R. W., Jr., and C. E. Miller. 1986. Ultrastructure of sexual reproduction in Olpidiopsis varians. Mycologia 78: 359–370.
   Web of Science ®Google Scholar
• McDonough, E. S. 1937. The nuclear history of Sclerospora graminicola. Mycologia 29: 151–173.
   Google Scholar
• Papa, K. E., W. A. Campbell, and F. F. Hendrix. 1967. Sexuality in Pythium sylvaticum: heterothallism. Mycologia 59: 589–595.
   PubMed Web of Science ®Google Scholar
• Plaats-Niterink, A. J. van der. 1981. Monograph of the genus Pythium. Stud. Mycol. 21: 1–242.
   Google Scholar
• Pratt, R. G., and R. J. Green, Jr. 1973. The sexuality and population structure of Pythium sylvaticum. Canad. J. Bot. 51: 429–436.
   Google Scholar
• Raper, J. R. 1950. Sexual hormones in Achlya. VII. The hormonal mechanism in homothallic species. Bot. Gaz. 112: 1–24.
   Google Scholar
• Reeleder, R. D., and D.J. Hagedorn. 1981. Pythium populations in Wisconsin bean fields. Canad. J. Pl. Pathol. 3: 90–93.
   Google Scholar
• Ross, I. K. 1979. Biology of the fungi, their development, regulation, and associations. McGraw-Hill, New York.
   Google Scholar
• Sansome, E. R. 1963. Meiosis in Pythium debaryanum Hesse and its significance in the life-history of the Biflagellatae. Trans. Brit. Mycol. Soc. 46: 63–72.
   Google Scholar
• Saunders, G. A. 1986. Chloride and other mineral salt requirements for reproduction of Pythium ultimum and other Oomycetes. Ph.D. Thesis, Univ. of California, Berkeley.
   Google Scholar
• Schmitthenner, A. F. 1962. Isolation of Pythium from soil particles. Phytopathology 52: 1133–1138.
   Google Scholar
• Schnepf, E., G. Deichgrüber, and G. Drebes. 1978. Development and ultrastructure of the marine, parasitic Oomycete, Lagenisma coscinodisci (Lagenidiales): sexual reproduction. Canad. J. Bot. 56: 1315–1325.
   Google Scholar
• Sparrow, F. K. 1960. Aquatic Phycomycetes. 2nd ed. Univ. Michigan Press, Ann Arbor, Michigan.
   Google Scholar
• Stevens, F. L. 1899. The compound oosphere of Albugo bliti. Bot. Gaz. 28: 149–176.
   Google Scholar
• Tompkins, C. M., P. A. Ark, C. M. Tucker, and J. T. Middleton. 1939. Soft rot of pumpkin and watermelon fruits caused by Pythium ultimum. J. Agric. Res. 58: 461–475.
   Google Scholar
• Trow, A. H. 1901. Observations on the biology and cytology of Pythium ultimum, n. sp. Ann. Bot. 15: 269–311.
   Google Scholar
• Win-Tin and M. W. Dick. 1975. Cytology of Oomycetes—evidence for meiosis and multiple chromosome associations in Saprolegniaceae and Pythiaceae, with an introduction to the cytotaxonomy of Achyla and Pythium. Arch. Microbiol. 105: 283–293.
   Google Scholar
• Yuen, G. Y., M. L. Craig, and F. Avila. 1993. Detection of Pythium ultimum with species-specific monoclonal antibody. Pl. Dis. 77: 692–698.
   Web of Science ®Google Scholar