Potato Early Dying: Causal Agents and Management Strategies

Rowe, R. C.; Davis, Julian; Powelson, M. L.; Rouse, D. I.

doi:10.1094/pd-71-0482

Cited by 126 publications

(66 citation statements)

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“…The two most notorious species are V. dahliae and V. albo-atrum, which cause billions of dollars in annual crop losses worldwide (109). Yield losses in potato crops may reach 50%, but are more commonly in the range of 10-15% (114,124,125), whereas in lettuce, losses can easily reach 100% (150). The soil habitat of these species, the ability of their survival structures to persist for years, and their capacity to infect a bewildering array of hosts make them chronic economic problems in crop production.…”

Section: Introductionmentioning

confidence: 99%

Diversity, Pathogenicity, and Management of Verticillium Species

Klosterman

Atallah

Vallad

et al. 2009

Annu. Rev. Phytopathol.

610

564

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The genus Verticillium encompasses phytopathogenic species that cause vascular wilts of plants. In this review, we focus on Verticillium dahliae, placing emphasis on the controversy surrounding the elevation of a long-spored variant as a new species, recent advances in the analysis of compatible and incompatible interactions, highlighted by the use of strains expressing fluorescent proteins, and the genetic diversity among Verticillium spp. A synthesis of the approaches to explore genetic diversity, gene flow, and the potential for cryptic recombination is provided. Control of Verticillium wilt has relied on a panoply of chemical and nonchemical strategies, but is beset with environmental or site-specific efficacy problems. Host resistance remains the most logical choice, but is unavailable in most crops. The genetic basis of resistance to Verticillium wilt is unknown in most crops, as are the subcellular signaling mechanisms associated with Ve-mediated, race-specific resistance. Increased understanding in each of these areas promises to facilitate management of Verticillium wilts across a broad range of crops.

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Section: Introductionmentioning

confidence: 99%

Diversity, Pathogenicity, and Management of Verticillium Species

Klosterman

Atallah

Vallad

et al. 2009

Annu. Rev. Phytopathol.

610

564

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show abstract

“…Vascular wilts are particularly notorious since, in the vascular system of host plants, the pathogens cannot be reached by many fungicides and few fungicides exist to cure plants once they are infected. Because of extremely persistent resting structures, such as microsclerotia, vascular wilt fungi survive in soil for many years, and the only effective control measure, soil fumigation, is expensive and has harmful environmental effects (Rowe et al, 1987;Fradin and Thomma, 2006). Their high economic impact, combined with the absence of curative treatments, justifies increased attention for vascular wilt diseases.…”

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confidence: 99%

Genetic Dissection ofVerticilliumWilt Resistance Mediated by Tomato Ve1

et al. 2009

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Vascular wilt diseases caused by soil-borne pathogens are among the most devastating plant diseases worldwide. The Verticillium genus includes vascular wilt pathogens with a wide host range. Although V. longisporum infects various hosts belonging to the Cruciferaceae, V. dahliae and V. albo-atrum cause vascular wilt diseases in over 200 dicotyledonous species, including economically important crops. A locus responsible for resistance against race 1 strains of V. dahliae and V. albo-atrum has been cloned from tomato (Solanum lycopersicum) only. This locus, known as Ve, comprises two closely linked inversely oriented genes, Ve1 and Ve2, that encode cell surface receptor proteins of the extracellular leucine-rich repeat receptor-like protein class of disease resistance proteins. Here, we show that Ve1, but not Ve2, provides resistance in tomato against race 1 strains of V. dahliae and V. albo-atrum and not against race 2 strains. Using virus-induced gene silencing in tomato, the signaling cascade downstream of Ve1 is shown to require both EDS1 and NDR1. In addition, NRC1, ACIF, MEK2, and SERK3/ BAK1 also act as positive regulators of Ve1 in tomato. In conclusion, Ve1-mediated resistance signaling only partially overlaps with signaling mediated by Cf proteins, type members of the receptor-like protein class of resistance proteins.

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“…Furthermore, the broad host ranges of Verticillium spp. make crop rotation ineffective, and fungicides to cure infected plants are not available (Wilhelm, 1955;Rowe et al, 1987;Fradin and Thomma, 2006).…”

mentioning

confidence: 99%

Interfamily Transfer of TomatoVe1MediatesVerticilliumResistance in Arabidopsis

et al. 2011

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Vascular wilts caused by soil-borne fungal species of the Verticillium genus are devastating plant diseases. The most common species, Verticillium dahliae and Verticillium albo-atrum, have broad host ranges and are notoriously difficult to control. Therefore, genetic resistance is the preferred method for disease control. Only from tomato (Solanum lycopersicum) has a Verticillium resistance locus been cloned, comprising the Ve1 gene that encodes a receptor-like protein-type cell surface receptor. Due to lack of a suitable model for receptor-like protein (RLP)-mediated resistance signaling in Arabidopsis (Arabidopsis thaliana), so far relatively little is known about RLP signaling in pathogen resistance. Here, we show that Ve1 remains fully functional after interfamily transfer to Arabidopsis and that Ve1-transgenic Arabidopsis is resistant to race 1 but not to race 2 strains of V. dahliae and V. albo-atrum, nor to the Brassicaceae-specific pathogen Verticillium longisporum. Furthermore, we show that signaling components utilized by Ve1 in Arabidopsis to establish Verticillium resistance overlap with those required in tomato and include SERK3/BAK1, EDS1, and NDR1, which strongly suggests that critical components for resistance signaling are conserved. We subsequently investigated the requirement of SERK family members for Ve1 resistance in Arabidopsis, revealing that SERK1 is required in addition to SERK3/BAK1. Using virus-induced gene silencing, the requirement of SERK1 for Ve1-mediated resistance was confirmed in tomato. Moreover, we show the requirement of SERK1 for resistance against the foliar fungal pathogen Cladosporium fulvum mediated by the RLP Cf-4. Our results demonstrate that Arabidopsis can be used as model to unravel the genetics of Ve1-mediated resistance.

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Potato Early Dying: Causal Agents and Management Strategies

Cited by 126 publications

References 0 publications

Diversity, Pathogenicity, and Management of Verticillium Species

Diversity, Pathogenicity, and Management of Verticillium Species

Genetic Dissection ofVerticilliumWilt Resistance Mediated by Tomato Ve1

Interfamily Transfer of TomatoVe1MediatesVerticilliumResistance in Arabidopsis

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