Identification of two powdery mildew fungi, Oidium neolycopersici sp. nov. and O. lycopersici, infecting tomato in different parts of the world

Kiss, Levente; Cook, R. T. A.; Saenz, G. S.; Cunnington, J. H.; Takamatsu, Susumu; Pascoe, I. G.; Bardin, Marc; Nicot, Philippe C.; Sato, Yukio; Rossman, Amy Y.

doi:10.1017/s0953756201004105

Cited by 122 publications

(107 citation statements)

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“…A smaller number have a worldwide distribution and a huge economic impact. Tomato powdery mildew, caused by Oidium neolycopersici (Kiss et al 2001) is a relatively new disease, which occurs mainly on glasshouse tomato crops. From the 1980s, when the first epidemics of powdery mildew were recorded in Western Europe, the pathogen rapidly spread through the whole of Europe and also to the countries of the New World .…”

Section: Introductionmentioning

confidence: 99%

“…In 1990s experimental studies concerning Oidium neolycopersici focused mainly on the morphological and molecular characterisation of this pathogen (Whipps et al 1998;Lebeda and Mieslerová 1999;Jones et al 2000;Kiss et al 2001;Mieslerová et al 2002), its host range (Whipps et al 1998;Lebeda and Mieslerová 1999;Lemaire et al 1999;Huang et al 2000a) and searching for resistance sources within indigenous genus Lycopersicon (Lindhout et al 1994a;Kumar et al 1995;Ignatova et al 1997;Milotay and Dormanns-Simon 1997;Ciccarese et al 1998;Mieslerová et al 2000).…”

Section: Introductionmentioning

confidence: 99%

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Resistance mechanisms of wild tomato germplasm to infection of Oidium neolycopersici

et al. 2013

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Tomato powdery mildew (Oidium neolycopersici) is one of the most devastating diseases of cultivated tomatoes worldwide. Although the first epidemics were recorded more than 25 years ago many aspects of this host-pathogen interaction are still not well understood. Detailed morphological and molecular studies of the anamorphs confirmed that O. neolycopersici is phylogeneticaly close to Erysiphe aquilegiae var. ranunculi. Host range is rather broad, apart from Solanaceae hosts were found in the families Apocynaceae, Campanulaceae, Crassulaceae, Cistaceae, Cucurbitaceae, Linaceae, Malvaceae, Papaveraceae, Pedialiaceae, Scrophulariaceae, Valerianaceae a Violaceae. Non-host resistance within these families is not based on inhibition of formation of primary haustorium, however, on post-haustorial hypersensitive reponse and another type of non-hypersensitive resistance. Screening of wild Solanum species (previous Lycopersicon spp.) germplasm revealed valuable sources of resistance (S. habrochaites, S. pennellii, S. cheesmaniae, S. chilense, S. peruvianum). The main resistance mechanism was found to be a hypersensitive response (HR), in some cases followed by limited development of the pathogen. However, there is a broad variation in resistance response on the histological and cytological level. Interaction between many wild Solanum spp. and O. neolycopersici is race-specific, at least three races were differentiated. In some interspecific crosses (S. lycopersicum × S. habrochaites) adult plant resistance was observed. Biochemical studies focusing on production of reactive oxygen species (ROS) and peroxidase activity during infection of O. neolycopersici showed that production of ROS and activity of corresponding enzymes is related to activation of defence responses in genotypes of wild Solanum sect. Lycopersicon. The significance of nitric oxide (NO) in O. neolycopersici pathogenesis was supported by experiments with NO donors and scavengers. In moderately resistant genotype S. chmielewskii, treatment by heat stress caused slight deceleration of pathogen development, increased production of jasmonic acid (JA) and abscisic acid (ABA) and increased peroxidase activity in infected plants. The different degree of tomato resistance/ susceptibility did not markedly change the rate and extent of photosynthetic response to O. neolycopersici; only minimal impairment of photosynthesis was found in both susceptible and moderately resistant genotypes during the Harper Adams University, Newport, Shropshire TF10 8NB, UK first 9 days after inoculation. The accumulated evidence confirm a crucial role of localised increased production of ROS and reactive nitrogen species (RNS) in response to pathogen penetration into plant tissue and its involvement in the plant resistance responses including the initiation and progression of plant cell death in host wild Solanum species. Crucial points of further research are discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Resistance mechanisms of wild tomato germplasm to infection of Oidium neolycopersici

et al. 2013

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“…After almost a century an epidemic of tomato PM occurred in the Netherlands and spread within the next 10 years to all European countries. O. lycopersici was initially assumed to be the cause for this epidemic, however, later studies discovered that the causal agent is O. neolycopersici (Jones et al 2000Kiss et al 2001). Now it is believed that O. neolycopersici is present worldwide, except in Australia where O. lycopersici is the causal agent for PM disease in tomato (Kiss et al 2001(Kiss et al , 2005.…”

Section: Oidium Lycopersici and O Neolycopersicimentioning

confidence: 99%

“…O. lycopersici was initially assumed to be the cause for this epidemic, however, later studies discovered that the causal agent is O. neolycopersici (Jones et al 2000Kiss et al 2001). Now it is believed that O. neolycopersici is present worldwide, except in Australia where O. lycopersici is the causal agent for PM disease in tomato (Kiss et al 2001(Kiss et al , 2005. Although there is not a consensus on the host range of O. neolycopersici Lebeda et al 2013), there is some evidence suggesting that this pathogen is adapted to plant species from 13 plant families (Whipps et al 1998;Jankovics et al 2008).…”

Section: Oidium Lycopersici and O Neolycopersicimentioning

confidence: 99%

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Genetics and molecular mechanisms of resistance to powdery mildews in tomato (Solanum lycopersicum) and its wild relatives

et al. 2013

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Powdery mildews (PMs) cause disease in a wide range of plant species including important crops. Taking tomato as an example, here we review findings on the genetic basis and mechanisms of plant resistance to PMs. First, we present a summary of our research on tomato resistance to two PM species, with the focus on Oidium neolycopersici. We discuss the genetics of resistance to this pathogen in tomato. Then, we compare different forms of resistance mediated by different resistance genes based on molecular and cytological data. Also, we provide a comparison between these resistance genes in tomato with those in barley, Arabidopsis and wheat, in order to present a model for the genetic basis of resistance to PMs in plants. We try to accommodate these resistance mechanisms in the current model of plant innate immunity. At the end we discuss possibilities to translate these findings to practical approaches in breeding for resistance to PMs in crops.

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Introduction to Concepts of Population Genetics

Acquaah

2012

Principles of Plant Genetics and Breeding

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Identification of two powdery mildew fungi, Oidium neolycopersici sp. nov. and O. lycopersici, infecting tomato in different parts of the world

Cited by 122 publications

References 34 publications

Resistance mechanisms of wild tomato germplasm to infection of Oidium neolycopersici

Resistance mechanisms of wild tomato germplasm to infection of Oidium neolycopersici

Genetics and molecular mechanisms of resistance to powdery mildews in tomato (Solanum lycopersicum) and its wild relatives

Introduction to Concepts of Population Genetics

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