Potato Blight and Leaf-Roll Virus

Richardson, D. E.; Doling, D. A.

doi:10.1038/180866b0

Cited by 17 publications

(6 citation statements)

References 1 publication

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“…in contrast to Richardson & Doling (1957) that rates of invasion by P. infestans were identieal, suggesting that the only effects which leaf-roll virus intection has on blight may result from distorted leaves altering the microclimate. Infection by potato viruses X and Y has been reported to reduce the susceptibility of leaves to blight (Muller & Munro, 1951), possibly by inhibiting the liberation and germination of zoospores and reducing the aggressiveness ofthe fungus (Kalra et al.…”

Section: Other Effects Of the Aerial Environmentmentioning

confidence: 74%

“…Alpha, was much more resistant to blight in New York than it ,, ^ ,,, , was in Toluca. Differences found between the '"•"' '"f'"'"" ^"^ blight susceptibility sites may have been due to differences in the aerial Richardson & Doling (1957) attributed the environment. Over 30 years ago, Umaerus (1959) greater bhght susceptibility of whole leaves considered that field resistance to foliage blight infected with potato leaf-roll virus to the fact that could be reduced by shortening the photoperiod the curled surfaces remained wet for longer than and decreasing the light intensity.…”

Section: Other Effects Of the Aerial Environmentmentioning

confidence: 99%

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Effects of the aerial environment on late blight of potato foliage–a review

Harrison¹

1992

Plant Pathology

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Section: Other Effects Of the Aerial Environmentmentioning

confidence: 74%

Section: Other Effects Of the Aerial Environmentmentioning

confidence: 99%

Effects of the aerial environment on late blight of potato foliage–a review

Harrison¹

1992

Plant Pathology

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“…In potato, the available literature shows somewhat diverging results on disease severity in multiple versus single infections. Indeed, Richardson and Doling (1957) showed an increased incidence and severity of late blight, caused by the oomycete Phytophthora infestans , on tubers of plants co‐infected by potato leaf roll virus (PLRV) compared to neighbouring virus‐free plants. A similar observation was made in potato cultivars upon co‐infection with potato virus X (Dowley, 1973) or with potato virus S (Lin et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…A similar observation was made in potato cultivars upon co‐infection with potato virus X (Dowley, 1973) or with potato virus S (Lin et al, 2014). However, Richardson and Doling (1957) also showed that, under laboratory conditions, potato leaflets infected with PLRV are significantly less susceptible to infection by P . infestans , and that the expansion of late blight symptoms was also slower in virus‐infected than in virus‐free leaflets.…”

Section: Introductionmentioning

confidence: 99%

Multiple infections influence the resistance of potato cultivars to late blight and potato cyst nematodes

et al. 2022

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Each season, crops face simultaneous or successive multiple infections. Yet cultivar resistance is often bred against one pest at a time, and screened under single infections. This raises the question of resistance expression bred under mono‐infections when exposed to multiple infections. We tackled this question by measuring the level of quantitative resistance of potato cultivars to either Globodera pallida or Phytophthora infestans under single or multiple infections, using potato virus Y (PVY) or Rhizoctonia solani as the co‐infector. Overall, co‐infection resulted in less multiplication of the target pathogen compared to single infection, although this reduction did not always reach statistical significance. A preliminary assessment of defence gene expression in plants infected with P. infestans alone or together with PVY or R. solani suggested that P. infestans repressed defence genes previously triggered by PVY, but boosted the expression of these genes when primed by R. solani. Together, these data support the view that resistance expression is impacted by co‐infection, and that it should be screened under multiple infection situations to be best assessed and exploited as a component of Integrated Pest Management strategies.

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“…If the damage caused by two concurrently infecting pathogens is similar to the sum of damages caused by the pathogens attacking the host separately, the effect is additive; if the damage is less, there is a negative interaction; if it is greater, a positive interaction. Studies on interactions between systemic viruses and fungal diseases show that viral pre‐infection may have either an additive effect (Damsteegt et al ., 1993), or a positive (Richardson & Doling, 1957), or negative (Potter, 1982; Omar et al ., 1986; Zaiter et al ., 1990) interaction with fungal pathogens.…”

Section: Introductionmentioning

confidence: 99%

Effects of bean line pattern mosaic virus on the monocyclic components of rust and angular leaf spot of Phaseolus bean at different temperatures

et al. 1998

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Monocyclic components (development rate during the incubation period or latent period, lesion density, lesion size and disease severity) of rust (Uromyces appendiculatus) and of angular leaf spot (Phaeoisariopsis griseola) in two bean (Phaseolus vulgaris) cultivars (Rosinha G-2 and Carioca), pre-infected or not with bean line pattern mosaic virus (BLPMV), were determined. Trials were conducted at temperatures in the range from 9 to 27ЊC for rust and from 12 to 30ЊC for angular leaf spot. Regardless of viral pre-infection, the effect of temperature on the four monocyclic components followed an optimum curve and could be described by a generalized beta function. Generally, angular leaf spot was favoured by higher temperatures with an optimum for disease severity between 24·2 and 28·3ЊC compared with 15·9-18·5ЊC for rust. Pre-infection with BLPMV did not change the shape of the optimum curves for all components, but significantly reduced lesion density and disease severity on both cultivars. The development rates during incubation and latent periods for both fungal diseases were not affected by BLPMV. Pre-infection with virus did not alter the ranking of cultivars with respect to resistance to both fungal diseases.

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Potato Blight and Leaf-Roll Virus

Cited by 17 publications

References 1 publication

Effects of the aerial environment on late blight of potato foliage–a review

Effects of the aerial environment on late blight of potato foliage–a review

Multiple infections influence the resistance of potato cultivars to late blight and potato cyst nematodes

Effects of bean line pattern mosaic virus on the monocyclic components of rust and angular leaf spot of Phaseolus bean at different temperatures

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