Results 121 to 130 of about 1,093 (168)
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CYTOLOGICAL STUDIES OF VENTURIA INAEQUALIS
Canadian Journal of Botany, 1958A cytological study of Venturia inaequalis has revealed that only one meiosis occurs in the ascus, and that the haploid number of chromosomes is seven. Most asci originate through typical hooks, but in a number of perithecia these croziers are absent, and large budding cells give rise to small ascus-shaped structures.
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Some Nuclear Phenomena in Venturia inaequalis
Bulletin of the Torrey Botanical Club, 1940The development of the aseoearp of Ventturia inagequalis (Cke.) -Wint. has beeni stuldied by Killian (1917) anld Frey (1924), both of wNlhoin reviewv, ed extensive literature dealin1g wTith sexuality in the Asco:mnyeetes. Their wiork has beeni reviewed by Keitt anid Palmiiiter (1938) in con-nectionl with stuldies on heterothallismnancd v7ariability in ...
E. J. Backus, G. W. Keitt
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Melanoprotein and virulence determinants of Venturia inaequalis
Physiological Plant Pathology, 1984Abstract The capacity of the melanoprotein produced in culture by a virulent isolate of Venturia inaequalis to increase the number of lesions on inoculated plants, was not significantly reduced by treatment with iron salts. Iron was tightly bound by the melanoprotein, in contrast with calcium and magnesium which were removed from mixtures by ...
R.C. Hignett, A.L. Roberts, J.H. Larder
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POLYMORPHISM OF APPLE SCAB VENTURIA INAEQUALIS IN BELARUS
Молекулярная и прикладная генетика, 2021Study of Venturia inaequalis (Cooke) Wint. polymorphism causing apple scab is due to the need to elaborate and implement breeding programs allowing to develop highly resistant apple varieties and systems of phytosanitary protection against the pathogen.
Z. A. Kazlouskaya +3 more
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Agrobacterium and PEG-mediated transformation of the phytopathogen Venturia inaequalis
Mycological Research, 2003We report the development of two new transformation systems, polyethylene glycol (PEG)-mediated transformation of protoplasts and Agrobacterium tumefaciens-mediated transformation of mycelium, for the filamentous ascomycete Venturia inaequalis. New binary vectors have been created for the latter.
Fitzgerald, A. M. +3 more
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Venturia inaequalis. XV. Histology of Infections by Biochemical Mutants
American Journal of Botany, 1964Microscopic examination of apple leaves infected by biochemical mutants of Venturia inaequalis showed that all mutants had penetrated the cuticle and had established themselves in the characteristic subcuticular position without an additional source of their required substances from outside the host.
D. M. Kline, D. M. Boone, G. W. Keitt
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Ultrastructure of the Ascospores and Conidia of Venturia Inaequalis
Proceedings, annual meeting, Electron Microscopy Society of America, 1973Venturia inaequalis (Cke.) Wint. is the causal agent of scab,a worldwide disease of apples. There have been few electron microscopic investigations on any phase of this fungus. The studies reported herein were initiated to clarify some ultrastructural characteristics of ascospores and conidia.In the spring ascospores develop within perithecia on ...
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Venturia inaequalis resistance in apple
2006Apple scab caused by Venturia inaequalis has evoked the interest for quite different reasons of scientists, agronomists, producers and consumers since over a century. Consumers select spotless apples, producers want to avoid damage, agronomists are asked to develop and implement control measures mostly based on fungicides, scientists are challenged to ...
C. Gessler +4 more
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Susceptibility of apple cultivars to Venturia inaequalis
2000Apple scab is one of the greatest apple management problems throughout the world Much work has been done on cultivars resistant to Venturia inaequalis (Cke.) Wint., but few have been a commercial success. This frequently leaves fungicides as the only control method used. As Quebec growers select new cultivars for planting, more information is needed on
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Eradication of Venturia inaequalis (Cooke) Wint.
Nature, 1954THE control of apple scab or black spot, caused by Venturia inaequalis, using protective and eradicant protective spray programmes during the parasitic phase of fungal activity has reached a stage beyond which further substantial improvement is unlikely.
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