Results 151 to 160 of about 1,857 (191)

Quinic acid induces hypovirulence and expression of a hypovirulence-associated double-stranded RNA in Rhizoctonia solani

Current Genetics, 2003
A double-stranded (ds)RNA, designated as M2, is associated with hypovirulence, conversion of the quinic acid pathway from inducible to constitutive and downregulation of the shikimic acid pathway in the Rhizoctonia solani culture Rhs 1A1. In this study, we report that in the virulent, M2-lacking isolate Rhs 1AP, which is isogenic to Rhs 1A1, quinic ...
Chunyu, Liu, Dilip K, Lakshman, Stellos M, Tavantzis   +2 more
openaire   +2 more sources

Role of Mitochondrial DNA in the Senescence and Hypovirulence of Fungi and Potential for Plant Disease Control

Annual Review of Phytopathology, 2000
The unique coenocytic anatomy of the mycelia of the filamentous fungi and the formation of anastomoses between hyphae from different mycelia enable the intracellular accumulation and infectious transmission of plasmids and mutant mitochondrial DNAs ...
Helmut Bertrand
exaly   +2 more sources

Hypovirulence of Chestnut Blight Fungus Conferred by an Infectious Viral cDNA

Science, 1992
Strains of the chestnut blight fungus Cryphonectria parasitica that contain viral double-stranded RNAs often exhibit reduced virulence. Such hypovirulent strains act as biocontrol agents by virtue of their ability to convert virulent strains to hypovirulence after anastomosis.
Donald L Nuss, Gil H Choi, G H Choi
exaly   +3 more sources

Hypovirulent isolates of Cryphonectria parasitica in southern Ontario

Canadian Journal of Plant Pathology, 1993
(1993). Hypovirulent isolates of Cryphonectria parasitica in southern Ontario. Canadian Journal of Plant Pathology: Vol. 15, No. 4, pp. 245-252.
M.M. Dunn, G. J. Boland
openaire   +1 more source

Transmissible hypovirulence inSclerotinia minor

Canadian Journal of Plant Pathology, 1996
Thirty isolates of Sclerotinia minor were collected from a 4 ha commercial lettuce crop at Holland Marsh, Ontario, and examined for the presence of transmissible hypovirulence. Three slow-growing isolates with atypical colony morphology were less virulent (P = 0.05) on detached lettuce leaves than other isolates and were considered hypovirulent.
M.S. Melzer, G.J. Boland
openaire   +1 more source

A strain of mycovirus AaVV1 mediates hypovirulence of Alternaria species

Pesticide Biochemistry and Physiology
The genus Alternaria comprises a wide range of ubiquitous plant pathogens that affect various host plants. Certain mycoviruses can induce changes in the biological characteristics and virulence of host fungi, offering potential for biocontrol in managing fungal plant diseases. Here, we identified a mycovirus with a high degree of homology to Alternaria
Ya Rong, Wang, Yi, Chen, Chang Xin, Li, Xiao Gang, Li, Jun Zi, Zhu, Jie, Zhong   +5 more
openaire   +2 more sources

The Genetic Mechanism of Hypovirulence in Cryphonectria (Endothia) Parasitica

1992
Infections caused by plant pathogenic fungi are responsible for about 70% of the major crop diseases, and consequently they are in many cases a nightmare to farmers or greenhouse growers. Occassionally, the right combination of a susceptible host with a virulent isolate of a fungus can lead to devastating epidemics, with entire crops being wiped out ...
Pierre Pfeiffer, Neal K. Van Alfen
openaire   +1 more source

The Acquisition of Hypovirulence in Host‐Pathogen Systems with Three Trophic Levels

The American Naturalist, 1998
A major focus of research on the dynamics of host-pathogen interactions has been the evolution of pathogen virulence, which is defined as the loss in host fitness due to infection. It is usually assumed that changes in pathogen virulence are the result of selection to increase pathogen fitness.
D R, Taylor, A M, Jarosz, D W, Fulbright, R E, Lenski   +3 more
openaire   +2 more sources

Suppression of Fusarium wilt of spinach with hypovirulent binucleate Rhizoctonia

Journal of General Plant Pathology, 2003
Four isolates of hypovirulent binucleate Rhizoctonia (HBNR) were evaluated for their ability to control Fusarium wilt of spinach (FWS) caused by Fusarium oxysporum f. sp. spinaciae (FOS). Fourteen-day-old spinach seedlings grown in paper pots with HBNR-amended soil (1% w/w ground barley grain inoculum) were transferred to artificially pathogen-infested
A. Muslim, Hayato Horinouchi, Mitsuro Hyakumachi   +2 more
openaire   +1 more source

Movement of cytoplasmic hypovirulence agents in chestnut blight cankers

Canadian Journal of Botany, 1992
Chestnut blight cankers, initiated with virulent methionine auxotrophic strains of Cryphonectria parasitica, were challenged by placing one or two discs of agar and mycelium of prototrophic hypovirulent strains at their base. Movement of hypovirulence agents was confirmed by recovery of an isolate that exhibited the typical morphology of the ...
L. Shain, J. B. Miller
openaire   +1 more source