Biochemical changes during the necrotic systemic infection of tobacco plants by potato virus Y, necrotic strain

1988 ◽  
Vol 32 (1) ◽  
pp. 105-113 ◽  
Author(s):  
P. Roggero ◽  
S. Pennazio
Keyword(s):  
Potato Virus ◽  
Potato Virus Y ◽  
Systemic Infection ◽  
Biochemical Changes ◽  
Tobacco Plants

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.

DIFFERENCE IN THE TRANSMISSION OF PVY° TO POTATO AND TOBACCO BY THE POTATO APHID, MACROSIPHUM EUPHORBIAE (THOMAS): EFFECTS OF PROBING DURATION AND FREQUENCY

1991 ◽  
Vol 123 (4) ◽  
pp. 869-874 ◽  
Author(s):  
Gilles Boiteau ◽  
R.P. Singh
Keyword(s):  
Causal Relationship ◽  
Short Duration ◽  
Potato Virus ◽  
Potato Virus Y ◽  
Macrosiphum Euphorbiae ◽  
Tobacco Plants ◽  
Potato Aphid ◽  
Probing Behavior ◽  
Pvy Transmission ◽  
Nonpersistent Viruses

AbstractThe probing behavior of the potato aphid, Macrosiphum euphorbiae (Thomas), is significantly different on potato than on tobacco plants. The higher frequency of short-duration probes, ideal for the transmission of nonpersistent viruses, is the apparent cause for the higher rate of potato virus Y° (PVY°) transmission on tobacco than on potato. However, experimental augmentation of short inoculation probes by M. euphorbiae on potato and tobacco failed to increase PVY° transmission on either. These results demonstrate the absence of a causal relationship between variations in probing behavior of M. euphorbiae and variations in the transmissibility of PVY° by this vector on tobacco and potato.

SOME EFFECTS OF FORMALDEHYDE ON POTATO VIRUS Y IN VITRO, AND ABILITY OF APHIDS TO TRANSMIT THE VIRUS WHEN THEIR STYLETS ARE TREATED WITH FORMALDEHYDE

1955 ◽  
Vol 1 (9) ◽  
pp. 783-793 ◽  
Author(s):  
R. H. E. Bradley ◽  
R. Y. Ganong
Keyword(s):  
Potato Virus ◽  
Myzus Persicae ◽  
Potato Virus Y ◽  
Tobacco Plants ◽  
Considerable Distance ◽  
Formaldehyde Treatment ◽  
Aphid Vectors ◽  
Infected Tobacco

Potato virus Y (PVY) was made noninfective by incubation with formaldehyde in vitro. Yet this noninfective virus reacted with PVY antiserum and caused antibodies to be produced in rabbits as readily as infective PVY. A method is described for baring the stylets of living aphids beyond the end of the labium, which normally encloses the stylets. Specimens of Myzus persicae (Sulz.) infective with PVY were made noninfective by treating the stylets for 30 sec. with concentrations of formaldehyde as low as 0.03%; and 0.25% formaldehyde caused the same effect in five seconds. Aphids were also made noninfective when the proboscis with the tip of the stylets bared was treated with formaldehyde, even after the stylets had been inserted a considerable distance into infected tobacco plants. By contrast, aphids usually remained infective when the proboscis with the stylets enclosed in the labium was treated with similar concentrations of formaldehyde. However, formaldehyde treatment of the stylets did not affect the ability of aphids immediately thereafter to acquire and transmit PVY. These results are compatible with the hypothesis that viruses transmitted like PVY are carried by the stylets of their aphid vectors.

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.

Patterns of phenylpropanoids in non-inoculated and potato virus Y-inoculated leaves of transgenic tobacco plants expressing yeast-derived invertase

2001 ◽  
Vol 56 (6) ◽  
pp. 535-541 ◽  
Author(s):  
Alfred Baumert ◽  
Hans-Peter Mock ◽  
Jürgen Schmidt ◽  
Karin Herbers ◽  
Uwe Sonnewald ◽  
...  
Keyword(s):  
Transgenic Tobacco ◽  
Potato Virus ◽  
Potato Virus Y ◽  
Transgenic Tobacco Plants ◽  
Tobacco Plants

Elevated CO2 alleviates damage from Potato virus Y infection in tobacco plants

Plant Science ◽  
2010 ◽  
Vol 179 (3) ◽  
pp. 219-224 ◽  
Author(s):  
Lefu Ye ◽  
Xue Fu ◽  
Feng Ge
Keyword(s):  
Elevated Co2 ◽  
Potato Virus ◽  
Potato Virus Y ◽  
Tobacco Plants

scholarly journals Salicylic Acid Suppresses Potato virus Y Isolate N:O-Induced Symptoms in Tobacco Plants

2006 ◽  
Vol 96 (3) ◽  
pp. 255-263 ◽  
Author(s):  
Xianzhou Nie
Keyword(s):  
Salicylic Acid ◽  
Potato Virus ◽  
Systemic Acquired Resistance ◽  
Potato Virus Y ◽  
Early Stage ◽  
Acquired Resistance ◽  
Partial Recovery ◽  
Pr Genes ◽  
Tobacco Plants ◽  
Systemic Development

The effects of salicylic acid (SA) and 1-aminocyclopropane-1-carboxylic acid (ACC) on the systemic development of symptoms induced by a severe isolate of Potato virus Y group N:O (PVYN:O) in tobacco were investigated. Upon inoculation, the systemic development of symptoms in tobacco plants could be divided into three stages: virus incubation stage, rapid symptom-progress stage, and partial recovery and symptom-shifting stage. Treatment of seedlings with SA delayed the virus-induced necrosis in stems by 1 to 2 days. SA, not ACC, also significantly suppressed the symptom severity in stems. However, neither SA nor ACC treatment affected the partial recovery phenotype exhibited in the latterly emerged upper parts of the plants. Further analysis indicated that the accumulation of PVY was retarded by SA at the early stage of infection, and the effects were more profound in stems than leaves. Peroxidase (POX) activity and pathogenesis-related (PR) genes PR-1a and PR-1b were enhanced by PVY infection. SA not only increased POX activity in stems and PR genes in stems and leaves of mock-inoculated plants, but also elevated the activity of POX in both leaves and stems and the expression of PR-1a in leaves of PVY-infected plants. Together, the results suggest that systemic acquired resistance plays a key role in suppressing PVYN:O-induced symptom development through SA-mediated and ethylene-independent pathways. The symptom suppression was correlated with reduced replication/ accumulation of virus at the early stage of infection. The results also suggest that neither SA nor ethylene plays a role in the recovery phenotype.

Sign in / Sign up

Export Citation Format

Share Document