Untersuchungen zur Systematik der Gattung Phytophthora de Bary

Schwinn, F. J.

doi:10.1007/bf00409798

Cited by 17 publications

(9 citation statements)

References 49 publications

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“…Five replicate cultures were grown for each temperature-medium combination. The results (Table 3) are similar to those reported by other authors (Tucker 1931;Leonian 1934;Schwinn 1959;Waterhouse 1963) for isolates from other countries. Shepherd and Pratt (1973) have reported that cultures of P. drechsleri Tucker were incapable of growth at 44°C, but when such cultures were returned to 25°C growth would sometimes recommence after a lag period.…”

Section: (B) Growth Experimentssupporting

confidence: 90%

Characterization of an Isolate of Phytophthora Nicotianae Var. Nicotianae From North Queensland

Shepherd¹,

Pratt²

1973

Aust. Jnl. Of Bio. Sci.

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An isolate of P. nicotianae var. nicotianae from North Queensland was shown to be of pathogenic race 0, since it was non-pathogenic to Nicotiana longifiora and N. plumbaginifolia, but was strongly pathogenic to N. rustica and N. tabacum. The pH optimum, the pH-growth response curve, the temperature optima for growth on various media, and growth in the presence of sterol were similar to those reported previously for isolates from America.The utilization of sugars and amino acids by the Australian isolate was compared with that reported for isolates from other sources. The difficulties of evaluating such comparisons and the need for conducting such investigations under precisely defined conditions are discussed.

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Section: (B) Growth Experimentssupporting

confidence: 90%

Characterization of an Isolate of Phytophthora Nicotianae Var. Nicotianae From North Queensland

Shepherd¹,

Pratt²

1973

Aust. Jnl. Of Bio. Sci.

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“…While Tompkins et aZ. (1936), Frezzi (1950, Schwinn (1959), andEl Helaly et aZ. (1968) report the maximum temperature for growth to be approximately 35°C, Tucker (1931), Leonian (1934), Waterhouse (1963), and Ershad (1971 state that P. drechsZeri showed slight growth in the range 37·0-37· 5°C.…”

Section: Discussionmentioning

confidence: 99%

Separation of Two Ecotypes of Phytophthora Drechsleri Tucker Occurring in Australian Native Forests

Shepherd¹,

Pratt²

1973

Aust. Jnl. Of Bio. Sci.

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A total of 70 isolates of P. drechsleri from Australian native eucalypt forests were separated into two distinct ecotypes. The "northern" ecotype occurred from North Queensland to the south of New South Wales, while the "southern" ecotype occurred in South Australia, Victoria, Tasmania, and New South Wales.The northern ecotype on average grew faster on a variety of media than did the southern one, but ecotypes could not be recognized unequivocally on this basis. The upper temperature limit for growth of the northern ecotype was in the range 36-37' 5°C, while that for the southern was 33-36°C. Ecotypes could be separated on the bases of their growth rates in the presence of 33 .ug/ml Cu2+ ions (23' 54 and 55· 66 % of the growth in the absence of copper by the northern and southern ecotypes respectively), orin the presence of 1 p.p.m. pyronin G (63' 34 and 33· 87 % of the growth in the absence of pyronin G by the northern and southern ecotypes respectively). Both ecotypes showed similar pH optima for growth, similar responses to the effects of exposure at 44°C on subsequent growth at 25°C, and similar degrees of growth inhibition by 0·05 p.p.m. malachite green.It is tentatively suggested that the geographic distribution of the southern ecotype is related to the area enclosed by the 29·4 °C (85°F) isotherm of average daily maximum temperature during the period November to March annually.

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“…agar, 1000 ml H.,0 dest. ), or the synthetic medium described by SCHWINN (1959). Temperature studies were made in 4 replicates.…”

Section: Methodsmentioning

confidence: 99%

Pbytophthora Trunk Rot on Loquat Trees, Eriobotrya japonica, in Lebanon

Weltzien

Schwinn²

1966

J Phytopathol

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Untersuchungen zur Systematik der Gattung Phytophthora de Bary

Cited by 17 publications

References 49 publications

Characterization of an Isolate of Phytophthora Nicotianae Var. Nicotianae From North Queensland

Characterization of an Isolate of Phytophthora Nicotianae Var. Nicotianae From North Queensland

Separation of Two Ecotypes of Phytophthora Drechsleri Tucker Occurring in Australian Native Forests

Pbytophthora Trunk Rot on Loquat Trees, Eriobotrya japonica, in Lebanon

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