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potato/nekrose

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The full-length genome of Potato virus Y (PVY) nnp strain, recovered from pepper showing veinal necrosis of leaves, was cloned and sequenced, finding an organisation typical for PVY species. It consists of 9699 nucleotides (nt) excluding the 3' terminal poly(A) tail and contains an open reading

Assessing Potato Cultivar Sensitivity to Tuber Necrosis Caused by Potato mop-top virus.

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Potato mop-top virus (PMTV) causes mop top disease in potato. This disease can result in a decline in tuber quality causing economic losses to growers due to the production of necrotic lesions and discolored tissue in infected tubers. Due to the soilborne nature of PMTV, identifying and developing

Effect of Soil Moisture Management on the Development of Potato mop-top virus-Induced Tuber Necrosis.

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Potato mop-top virus (PMTV), transmitted by Spongospora subterranea f. sp. subterranea, the causal agent of powdery scab in potato, has become one of the most important tuber necrosis viruses in the United States. The virus has been confirmed in six major potato-producing states in the United States

Assessing Potato Cultivar Sensitivity to Tuber Necrosis Caused by Tobacco rattle virus.

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Tobacco rattle virus (TRV) causes the economically important corky ring spot disease in potato. Chemical control is difficult due to the soilborne nature of the TRV-transmitting nematode vector, and identifying natural host resistance against TRV is considered to be the optimal control measure. The
Hypersensitive resistance (HR) to strains O and C of Potato virus Y (PVY, genus Potyvirus) is conferred by potato genes Ny(tbr) and Nc(tbr), respectively; however, PVY N strains overcome these resistance genes. The viral helper component proteinases (HCpro, 456 amino acids) from PVY(N) and PVY(O)
Three potato virus Y isolates, representatives of distinct PVY groups, identified in potato fields in northern Poland were submitted to biological and molecular analysis. Phenotypically, two isolates, PVYN-Ny and PVYN-Wi, belong to the necrotic strain and the third one (PVYO-LW) to the common
A novel Potato virus Y (PVY) isolate, L26, recovered from a Frontier potato line was initially typed as a PVY(NTN) strain using multiplex RT-PCR and serological assays. However, L26 induced mosaic and mild vein clearing symptoms in tobacco rather than vein necrosis characteristic of the PVY (NTN)
Summary A root knot nematode resistance gene in Nicotiana tabacum, Rk, providing resistance to the nematode parasite Meloidogyne incognita is tightly linked to, or is a pleiotropic gene with a veinal necrosis systemic hypersensitive response to infection by Potato virus Y (PVY) M(s)N(r). The single

Identification of new Potato virus Y (PVY) molecular determinants for the induction of vein necrosis in tobacco.

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Two tobacco vein necrosis (TVN) determinants, the residues K(400) and E(419) , have been identified previously in the helper component-protease (HC-Pro) protein sequence of Potato virus Y (PVY). However, since their description, non-necrotic PVY isolates with both K(400) and E(419) necrotic
Viral molecular determinant(s) involved in the tobacco vein necrosis (TVN) symptom induced by necrotic isolates of Potato virus Y (PVY) on Nicotiana tabacum cv. Xanthi leaves remain undetermined. Reference isolates belonging to PVY(N) (infectious PVY(N)-605 clone) and PVY(O) (PVY(O)-139) were used
In order to reveal the induced resistance mechanism of tobacco treated with copper solution to potato virus Y-vein necrosis strain (PVY(N)), disease indexes, contents of virus and some physiological and biochemical indexes in tobacco were studied. The results showed that when treated at the copper
The prevalence of necrotic potato virus Y (PVY) in natural populations could reflect increased fitness of necrotic isolates. In this paper, the effects of the acquisition of molecular determinants (A/G(2213) and A/C(2271)) involved in necrosis capacity on both the number of progeny produced and the
To examine the role of RNA silencing in plant defenses against viroids, a Dicer-like 2 and 4 (DCL2&4)-double knockdown transgenic tomato plant line, 72E, was created. The expression of endogenous SlDCL2s and SlDCL4 in line 72E decreased to about a half that of the empty cassette

First Report of Tomato spotted wilt virus Causing Potato Tuber Necrosis in Texas.

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In the summer of 2008, potato (Solanum tuberosum L.) tubers (cvs. FL1867, FL2053, and FL1922) from commercial fields near Dalhart, TX were observed with distinct external erumpent rings and severe internal discolorations including blotches, spots, and dry, cork-like tissue. The presence of rings

Sensitivity of Potato Cultivars to Potato mop-top virus-Induced Tuber Necrosis.

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Potato (Solanum tuberosum) cultivars representing four market classes were assessed for sensitivity to Potato mop-top virus (PMTV)-induced tuber necrosis in three separate trials in a field in North Dakota known to be infested with PMTV. Reverse-transcription polymerase chain reaction confirmed the
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