A further note on the viruses affecting Atropa belladonna and a description of a virus complex attacking Hyoscyamus niger

Parasitology ◽  
1945 ◽  
Vol 36 (3-4) ◽  
pp. 209-210 ◽  
Author(s):  
Kenneth M. Smith
Keyword(s):  
Potato Virus ◽  
Systemic Infection ◽  
Nicotiana Sylvestris ◽  
Hyoscyamus Niger ◽  
Atropa Belladonna ◽  
Naturally Occurring ◽  
Local Lesions ◽  
Virus Complex ◽  
Solanaceous Plants

It has been shown that Atropa belladonna acts as a symptomless carrier of Hyosoyamus Virus I. Some symptoms caused by this virus on other solanaceous plants are described.A naturally occurring virus complex in Hyoscyamus niger was found to consist of Solanum Virus I (potato virus X) and Brassica Virus I. During the course of the investigation it was found that potato virus X forms local lesions on the cotyledons of ridge cucumber without systemic infection and that Brassica Virus I behaves similarly on the inoculated leaves of Nicotiana sylvestris.

A virus disease of Atropa belladonna

Parasitology ◽  
1943 ◽  
Vol 35 (3) ◽  
pp. 159-160 ◽  
Author(s):  
Kenneth M. Smith
Keyword(s):  
Phaseolus Vulgaris ◽  
Virus Disease ◽  
High Concentration ◽  
Atropa Belladonna ◽  
Nicotiana Glutinosa ◽  
Local Lesions ◽  
Solanaceous Plants

A virus disease of Atropa belladonna caused by a new virus is described. The virus is sap-transmissible to tobacco and other solanaceous plants and gives good local lesions on Nicotiana glutinosa and Phaseolus vulgaris. It occurs in fairly high concentration in the plant, it withstands ageing in extracted sap for 6–11 days, and is inactivated at a temperature between 75 and 80° C.

Characterisation of Potato virus Y nnp strain inducing veinal necrosis in pepper: a naturally occurring recombinant strain of PVY

2004 ◽  
Vol 150 (4) ◽  
pp. 709-720 ◽  
Author(s):  
A. Fanigliulo ◽  
S. Comes ◽  
R. Pacella ◽  
B. Harrach ◽  
D. P. Martin ◽  
...  
Keyword(s):  
Potato Virus ◽  
Recombinant Strain ◽  
Potato Virus Y ◽  
Veinal Necrosis ◽  
Naturally Occurring

Respiration of tobacco leaves infected with different strains of potato virus X

1969 ◽  
Vol 47 (5) ◽  
pp. 723-730 ◽  
Author(s):  
M. M. Dwurazna ◽  
M. Weintraub
Keyword(s):  
Potato Virus ◽  
Great Increase ◽  
Experimental Period ◽  
Potato Virus X ◽  
Metabolic Inhibitors ◽  
Virus Concentration ◽  
Tobacco Leaves ◽  
Respiration Rates ◽  
Local Lesions ◽  
Different Strains

A study was made of the effects on respiration by four strains of potato virus X varying in the severity of symptoms they produce on tobacco leaves. No effects on respiration rates were observed in either inoculated or systemically infected but symptomless leaves, even though there was a significant increase in virus concentration during the experimental period. However, a significant increase was detected in any leaves on which symptoms developed, this increase being directly correlated with the severity of symptom expression. At the same time a great increase in virus concentration was found. Measurement of respiration patterns of single local lesions showed that an increase in respiration occurred each time a chlorotic and necrotic ring formed in the tissues. The use of metabolic inhibitors indicated that metabolic controls are different in the leaves infected with latent or mild strains, as compared to those infected with the severe, necrotizing strains.

scholarly journals Potato virus Y (PVY) Isolates from Physalis peruviana are Unable to Systemically Infect Potato or Pepper and Form a Distinct New Lineage Within the PVYC Strain Group

2017 ◽  
Vol 107 (11) ◽  
pp. 1433-1439 ◽  
Author(s):  
Kelsie J. Green ◽  
Mohamad Chikh-Ali ◽  
Randall T. Hamasaki ◽  
Michael J. Melzer ◽  
Alexander V. Karasev
Keyword(s):  
Potato Virus ◽  
Potato Virus Y ◽  
Polyclonal Antibodies ◽  
Systemic Infection ◽  
Fruit Production ◽  
Genome Sequences ◽  
Physalis Peruviana ◽  
Geographical Separation ◽  
Leaf Deformation ◽  
Cape Gooseberry

Poha, or cape gooseberry (Physalis peruviana L.), is a plant species cultivated in Hawaii for fresh fruit production. In 2015, an outbreak of virus symptoms occurred on poha farms in the South Kohala District of the island of Hawaii. The plants displayed mosaic, stunting, and leaf deformation, and produced poor fruit. Initial testing found the problem associated with Potato virus Y (PVY) infection. Six individual PVY isolates, named Poha1 to Poha6, were collected from field-grown poha plants and subjected to biological and molecular characterization. All six isolates induced mosaic and vein clearing in tobacco, and three of them exhibited O-serotype while the other three reacted only with polyclonal antibodies and had no identifiable serotype. Until now, PVY isolates have been broadly divided into pepper or potato adapted; however, these six PVY isolates from poha were unable to establish systemic infection in pepper and in four tested potato cultivars. Whole-genome sequences for the six isolates were determined, and no evidence of recombination was found in any of them. Phylogenetic analysis placed poha PVY isolates in a distinct, monophyletic “Poha” clade within the PVYC lineage, suggesting that they represented a novel, biologically and evolutionarily unique group. The genetic diversity within this poha PVYC clade was unusually high, suggesting a long association of PVYC with this solanaceous host or a prolonged geographical separation of PVYC in poha in Hawaii.

scholarly journals Tobacco mosaic virus (TMV) and potato virus X (PVX) coat proteins confer heterologous interference to PVX and TMV infection, respectively

2006 ◽  
Vol 87 (4) ◽  
pp. 1005-1012 ◽  
Author(s):  
A. A. Bazzini ◽  
S. Asurmendi ◽  
H. E. Hopp ◽  
R. N. Beachy
Keyword(s):  
Transgenic Plants ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Potato Virus ◽  
Quaternary Structure ◽  
Systemic Infection ◽  
Potato Virus X ◽  
Coat Proteins ◽  
Local Cell ◽  
Cell Spread

Replication of Potato virus X (PVX) was reduced in transgenic protoplasts that accumulated wild-type coat protein (CPWT) of Tobacco mosaic virus (TMV) or a mutant CP, CPT42W, that produced highly ordered states of aggregation, including pseudovirions. This reaction is referred to as heterologous CP-mediated resistance. However, protoplasts expressing a CP mutant that abolished aggregation and did not produce pseudovirions, CPT28W, did not reduce PVX replication. Similarly, in transgenic tobacco plants producing TMV CPWT or CPT42W, there was a delay in local cell-to-cell spread of PVX infection that was not observed in CPT28W plants or in non-transgenic plants. The results suggest that the quaternary structure of the TMV CP regulates the mechanism(s) of heterologous CP-mediated resistance. Similarly, transgenic protoplasts that produced PVX CP conferred transient protection against infection by TMV RNA. Transgenic plants that accumulated PVX CP reduced the cell-to-cell spread of infection and resulted in a delay in systemic infection following inoculation with TMV or TMV RNA. Heterologous CP-mediated resistance was characterized by a brief delay in systemic infection, whilst homologous CP-mediated resistance conferred reduced or no systemic infection.

scholarly journals Resistance levels to two strains of Potato virus Y (PVY) in transgenic potatoes cv. Achat

2001 ◽  
Vol 19 (3) ◽  
pp. 348-350 ◽  
Author(s):  
André N. Dusi ◽  
César Carvalho ◽  
Antônio Carlos Torres ◽  
Antonio Carlos de Ávila
Keyword(s):  
Transgenic Plants ◽  
Optical Density ◽  
Potato Virus ◽  
Partial Resistance ◽  
Potato Virus Y ◽  
Systemic Infection ◽  
Transgenic Potato ◽  
Extreme Resistance ◽  
Density Values ◽  
Transgenic Potatoes

Two transgenic potato clones of cv. Achat, denominated 1P and 63P were challenged with two Potato virus Y strains (PVY O and PVY N), under greenhouse conditions, to be evaluated for resistance to these strains. Optical density values of the Elisa readings of samples from the transgenic plants were compared to readings from samples of the inoculated non-transformed plants. Clone 1P was extremely resistant to both PVY strains, reflected by not being systemically infected. Clone 63P, however, presented partial resistance to both PVY strains as local or systemic infection was delayed in some days. These results confirm the previously reported extreme resistance to PVY of clone 1P.

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