Results 121 to 130 of about 1,118 (179)

Biometry of oogonia and oospores of Saprolegniaceae

Botanical Journal of the Linnean Society, 1989
SOUMATI, B. & DICK, M. W., 1989. Biometry of oogonia and oospores of Saprolegniaceae. The distribution of data on the dimensions of oogonia and oospores for modal and near modal classes of oospore number per oogonium in multiovulate Oomycetes has been determined. Thirteen species of Saprolegniaceae have been examined. Two fundamental relationships have
B. SOUMATI, M. W. DICK
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Germination of oospores of Peronosclerospora sorghi

Transactions of the British Mycological Society, 1986
An improved and reliable method of germinating oospores of Peronosclerospora sorghi is described. Germination of oospores occurred in response to root exudates of susceptible and resistant host as well as non-host plants. A germination-triggering factor was present in the root exudates of all the plants tested.
P.S. Bhavanishankara Gowda, S. Shankara Bhat   +1 more
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STORAGE AND GERMINATION OF CHARA OOSPORES

Journal of Phycology, 1967
SUMMARY Germination tests were conducted on 39 collections of Chara oospores stored under 4 different conditions for periods of approximately 4 yr. In general, storage of dried oospores at low temperatures (3 C) provided the most satisfactory means for long‐term preservation of viable disseminules.
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Oospore production of Pythium artotrogus

Mycopathologia et Mycologia Applicata, 1969
The addition of cholesterol, b-sitosterol, stigmasterol and compost infusion to corn meal agar induced marked increases (four-fold) in oospore production, with only a small stimulation of growth rate. Progesterone stimulated oospore production, but inhibited growth. Estrone had no effect on reproduction, but inhibited growth.
K. K. Al-Hassan, C. L. Fergus
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Production of oospores by Peronospora viciae f.sp. fabae

Netherlands Journal of Plant Pathology, 1993
Oospore production inVicia faba, cv. Metissa, was quantified in the field after plants had been inoculated with a sporangium suspension of a homothallic isolate ofPeronospora viciae f.sp.fabae. Oospores were produced abundantly during the hole growing season from 3 weeks after inoculation on.
van der Gaag, D.J., Frinking, H.D., Geerds, C.F.   +2 more
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THE ROLE OF OOSPORES IN THE EPIDEMIOLOGY OF POTATO LATE BLIGHT

Acta Horticulturae, 2009
Potato late blight (Phytophthora infestans) is a plant disease feared globally by farmers and the potato industry. P. infestans is a heterothallic oomycete with two mating types. Until recently the pathogen was limited to surviving between seasons as living mycelia in its host plant in most parts of the world.
Andersson, B, Widmark, A -K, Yuen, J E, Nielsen, B, Ravnskov, S; id_orcid 0000-0003-0655-9983, Kessel, G J T, Evenhuis, A, Turkensteen, L J, Hansen, J G; id_orcid 0000-0001-7682-5613, Lehtinen, A, Hermansen, A, Brurberg, M -B, Nordskog, B   +12 more
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Evolution of Qol resistance in Plasmopara viticola oospores

European Journal of Plant Pathology, 2010
QoI resistance in P. viticola was first detected in France and Italy in 1999. Molecular and biological assays have been carried out since 2000 in order to provide reliable methods of detecting and quantifying resistance. Oospores were collected in vineyards located in northern and southern Italy.
S.L. Toffolatti, M. Prandato, L. Serrati, H. Sierotzki, U. Gisi, A. Vercesi   +5 more
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Germination of Oospores in Sclerospora Graminicola

Mycologia, 1972
(1972). Germination of Oospores in Sclerospora Graminicola. Mycologia: Vol. 64, No. 2, pp. 426-430.
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Viability and maturation ofAphanomyces cochlioidesoospores

Mycologia, 2003
Plasmolysis, tetrazolium bromide staining and microscopic appearance were tested for their usefulness in determining viability of oospores of Aphanomyces cochlioides. For comparison, three lethal treatments were employed to contrast the reaction of dead oospores and untreated, presumably viable oospores.
Alan T, Dyer, Carol E, Windels
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Germination of Oospores of Phytophthora erythroseptica

Nature, 1957
GERMINATION of comparatively young oospores of Phytophthora erythroseptica has been obtained following passage through the digestive tract of the garden snail, Helix aspersa. These oospores were produced in oat agar cultures maintained at 20° C. for 4–6 weeks.
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