A hypersensitive response-like mechanism is involved in resistance of potato plants bearing the Ry(sto) gene to the potyviruses potato virus Y and tobacco etch virus.

Hinrichs, John W. J.; Berger, Sylvie; Shaw, J. G.

doi:10.1099/0022-1317-79-1-167

Cited by 34 publications

(18 citation statements)

References 21 publications

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“…Parallel to the assembling of noncapsidated particles, it can be a result of host-plant defense reaction. Hinrichs et al (1998) and Hinrichs-Berger et al (1999) suggested that resistant plants interaction, the reaction is so quick and there is no time for virus cytoplasmic inclusions formation, as it is in this case, for complete particles formation. It seems that viral inclusions are not absolutely required for PVY genome replication or for cell-to-cell transport of the pathogen.…”

Section: Days After Infection) It Is Commonly Acknowledgedmentioning

confidence: 93%

Ultrastructural events during hypersensitive response of potato cv. Rywal infected with necrotic strains of potato virus Y

Otulak

Garbaczewska

2009

Acta Physiol Plant

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Potato plants cv. Rywal with hypersensitivity gene Ny-1 infected with PVY N or PVY NTN reacted in local necroses 3 days after infection. Potato virus Y (PVY) particles were found in epidermis, mesophyll, phloem and xylem cells in inoculated leaves. Noncapsidated virus particles (without capsid protein) were observed already 10 h after infection by using electron microscopy in situ. Capsid protein on one terminus of noncapsidated virus particles was located 5 days after inoculation with the use of immunogold labeling method. Whereas cytoplasmic inclusions were observed for the first time 24 days after infection during hypersensitive response. Ultrastructural studies showed that ER may take part in PVY RNA replication and capsidation of Potyvirus particles. Observed cytopathological changes and virus particles indicate that cell nucleus and mitochondrion might participate in PVY life cycle. During hypersensitive response PVY particles were found in plasmodesmata as well as in phloem and xylem.

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Section: Days After Infection) It Is Commonly Acknowledgedmentioning

confidence: 93%

Ultrastructural events during hypersensitive response of potato cv. Rywal infected with necrotic strains of potato virus Y

Otulak

Garbaczewska

2009

Acta Physiol Plant

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“…In the latter, no symptoms appear; the virus does not multiply and spread (Mehle et al ., 2004). This resistance was achieved by classical breeding, in which the Ry sto gene from the wild relative Solanum stoloniferum was introduced (Hinrisch et al ., 1998). A third cultivar, Pentland Squire, is also considered here.…”

Section: Introductionmentioning

confidence: 99%

Peroxidases in the early responses of different potato cultivars to infection by Potato virus Y^NTN

Milavec¹,

Gruden

Ravnikar

et al. 2008

Plant Pathology

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Peroxidases (POXs) were investigated in three cultivars of potato ( Solanum tuberosum ) with different susceptibilities to infection by Potato virus Y NTN ( PVY NTN ). Soluble, ionically-bound and covalently-bound POXs were analysed over 24 h post inoculation (hpi) in bottom inoculated leaves, upper intact leaves, and in roots. The first changes were observed at 3 hpi when the activity of ionically-bound POXs increased significantly in the inoculated leaves of tolerant cv. Pentland Squire and of resistant cv. Santé. The most pronounced changes were found in the resistant variety, where the increase was twice that in control plants. In contrast, in the inoculated leaves of susceptible cv. Igor, there was a decrease in ionically-bound POXs, accompanied by a two fold increase in the activity of covalently-bound POXs. Also at 3 hpi, cv. Santé showed increased activity of all three types of POXs in the upper intact leaves. Over the period of the experiment, enhanced activity of soluble POXs, correlated with the virus infection, was observed in both types of leaves of the susceptible cv. Igor. However, in resistant cv. Santé, the upper intact leaves of virus-inoculated plants showed a more intense but transient early response of soluble POXs. Part of a new POX gene was isolated from leaves of potato cv. Igor. A nucleotide sequence of 394 bp was determined and the abundance of the POX transcript was analysed by real-time PCR. There was no correlation between PVY NTN infection and the abundance of the transcript.

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“…Pentland Squire shows no visible symptoms postinfection, although the virus multiplies in the plant (Ravnikar et al ., 1996). Sante, a cultivar carrying the Ry sto gene from Solanum stoloniferum , shows extreme resistance to PVY NTN (Hinrichs et al ., 1998); it remains symptomless postinfection and the virus cannot be detected (Ravnikar et al ., 1996). The same is true for the transgenic line #35 of cv.…”

Section: Introductionmentioning

confidence: 99%

Systemic Potato virus Y^NTN infection and levels of salicylic and gentisic acids in different potato genotypes

et al. 2005

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Endogenous levels of free and conjugated salicylic (SA) and gentisic (GA) acids, both putative signal molecules in plant defence, were analysed in order to investigate their involvement in the resistance of four potato ( Solanum tuberosum ) genotypes with different susceptibilities to Potato virus Y NTN (PVY NTN ) infection: the highly susceptible cv. Igor and its extremely resistant transgenic line, the extremely resistant cv. Sante and the tolerant cv. Pentland Squire. The lowest levels of free and conjugated SA were observed in the extremely resistant cv. Sante, while free GA, which was detected in all the other varieties, was absent. The extremely resistant transgenic cv. Igor contained the highest basal total SA level and the lowest level of total GA of all four cultivars. In susceptible cv. Igor, but not in resistant transgenic cv. Igor, a systemic increase of free SA was measured 1 day postinfection (dpi). Even more significant increases of free and conjugated SA and GA were detected 11 dpi when systemic symptoms appeared. In inoculated but not in upper noninoculated leaves of resistant transgenic cv. Igor, significant increase of SA conjugates occurred, but not before 11 dpi. The increase of SA and GA in susceptible cv. Igor could contribute to the general elevated levels of phenolic compounds as a response to stress caused by virus infection. It appears that basal levels of SA and GA do not correlate with resistance to PVY NTN in potato plants.

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A hypersensitive response-like mechanism is involved in resistance of potato plants bearing the Ry(sto) gene to the potyviruses potato virus Y and tobacco etch virus.

Cited by 34 publications

References 21 publications

Ultrastructural events during hypersensitive response of potato cv. Rywal infected with necrotic strains of potato virus Y

Ultrastructural events during hypersensitive response of potato cv. Rywal infected with necrotic strains of potato virus Y

Peroxidases in the early responses of different potato cultivars to infection by Potato virus Y^NTN

Systemic Potato virus Y^NTN infection and levels of salicylic and gentisic acids in different potato genotypes

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A hypersensitive response-like mechanism is involved in resistance of potato plants bearing the Ry(sto) gene to the potyviruses potato virus Y and tobacco etch virus.

Cited by 34 publications

References 21 publications

Ultrastructural events during hypersensitive response of potato cv. Rywal infected with necrotic strains of potato virus Y

Ultrastructural events during hypersensitive response of potato cv. Rywal infected with necrotic strains of potato virus Y

Peroxidases in the early responses of different potato cultivars to infection by Potato virus YNTN

Systemic Potato virus YNTN infection and levels of salicylic and gentisic acids in different potato genotypes

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Peroxidases in the early responses of different potato cultivars to infection by Potato virus Y^NTN

Systemic Potato virus Y^NTN infection and levels of salicylic and gentisic acids in different potato genotypes