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Niks, Rients E.; Rubiales, Diego

doi:10.1023/a:1015634617334

Cited by 142 publications

(34 citation statements)

References 95 publications

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“…This contrasts with what was reported in other legume, broad bean, NHR to rust, where the successful location of stomata by the inappropriate wheat stripe rust was significantly reduced (Cheng et al, 2012). However, similarly to most rust plant hosts (Niks and Rubiales, 2002), pre-penetration resistance mechanisms, including reduction of urediospore germination and fungal development on the leaf surface, seem to be of marginal importance in M. truncatula against U. striatus , at best, in reducing infection levels.…”

Section: Discussionmentioning

confidence: 97%

“…It is today widely accepted that resistances genetically more complex, based on multiple loci, have the potential to be more durable. Nevertheless, durability is not only dependent on a complex genetic basis, but also on the resistance mechanisms involved, as some single-gene controlled mechanisms have proven to be more durable than others (Niks and Rubiales, 2002). The single-gene resistance most commonly used in rust resistance breeding is typically due to a post-haustorial defense mechanism, in which the plant cell collapses after the rust fungus started to form a haustorium in the cell resulting in hypersensitivity.…”

Section: Introductionmentioning

confidence: 99%

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Unveiling common responses of Medicago truncatula to appropriate and inappropriate rust species

Patto

Rubiales

2014

Front. Plant Sci.

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Little is known about the nature of effective defense mechanisms in legumes to pathogens of remotely related plant species. Some rust species are among pathogens with broad host range causing dramatic losses in various crop plants. To understand and compare the different host and nonhost resistance (NHR) responses of legume species against rusts, we characterized the reaction of the model legume Medicago truncatula to one appropriate (Uromyces striatus) and two inappropriate (U. viciae-fabae and U. lupinicolus) rusts. We found that similar pre and post-haustorial mechanisms of resistance appear to be operative in M. truncatula against appropriate and inappropriate rust fungus. The appropriate U. striatus germinated better on M. truncatula accessions then the inappropriate U. viciae-fabae and U. lupinicolus, but once germinated, germ tubes of the three rusts had a similar level of success in finding stomata and forming an appressoria over a stoma. However, responses to different inappropriate rust species also showed some specificity, suggesting a combination of non-specific and specific responses underlying this legume NHR to rust fungi. Further genetic and expression analysis studies will contribute to the development of the necessary molecular tools to use the present information on host and NHR mechanisms to breed for broad-spectrum resistance to rust in legume species.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Unveiling common responses of Medicago truncatula to appropriate and inappropriate rust species

Patto

Rubiales

2014

Front. Plant Sci.

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“…Poor germling adhesion to the leaf surface (Mendgen 1978;Wynn and Staples 1981), deviating micromorphology of the epidermal surface (Wynn and Staples 1981), stomatal guard cell morphology (Wynn 1976), epicuticular leaf wax layer (Vaz Patto and Niks 2001), leaf pubescence (Mmbaga et al 1994) and pH gradient on the epidermis (Wynn 1976;Edwards and Bowling 1986;Niks and Rubiales 2002) have been described in different plant species as influencing the germtube growth orientation and could be contributing to the less oriented germtube growth observed in the majority of the L. cicera accessions when compared with the pea check. This might be relevant reducing the infectability by reducing the number of infection units (appressorium over stoma).…”

Section: Discussionmentioning

confidence: 99%

“…Prehaustorial resistance is one of such mechanisms and prevents the formation of haustoria by the fungus. It is very common in nonhost interactions (Heath 1981), but can also be identified in host interactions, as a major component of partial resistance (Niks and Rubiales 2002;Rubiales and Niks 1995). Screening Lathyrus germplasm for disease resistance may result in the discovery of new resistance genes for pyramidation or non-hypersensitive, potentially more durable defence mechanisms to introduce into resistance breeding programs.…”

Section: Introductionmentioning

confidence: 99%

Pre and posthaustorial resistance to rusts in Lathyrus cicera L.

et al. 2008

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Lathyrus cicera has a high potential as fodder crop in dry areas, but can in particular environments be damaged by rust. Little is known on the availability of resistance against rust fungi and the underlying mechanisms in L. cicera germplasm. The present study assessed and characterised macro and microscopically the resistance to rust fungi Uromyces pisi and U. viciae-fabae, in a collection of L. cicera accessions. A wide range of disease reaction was found in the germplasm collection against the different rust species. L. cicera accessions were highly resistant to U. viciae-fabae being hypersensitive response the most frequent reaction. On the contrary, most accessions showed a compatible interaction with U. pisi, with varying levels of partial resistance, although cases of hypersensitivity were also identified. Differences on germination, orientated germ tube growth and appressoria differentiation were observed but were in general of marginal importance to explain the resistance to U. pisi among the L. cicera accessions. Resistance was due, to a combination of pre and post-haustorial mechanisms.

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“…Cell death can occur very fast so no haustorium can be observed, or rather slow, allowing formation of some haustoria and secondary hyphae (Prats et al 2007). HR is frequently described in resistance to powdery mildews (Boyd et al 1995;Niks and Rubiales 2002) and is the main mechanism of resistance in er2 and Er3 lines of pea (Fondevilla et al 2006b).…”

Section: Introductionmentioning

confidence: 99%

Penetration resistance to Erysiphe pisi in pea mediated by er1 gene is associated with protein cross-linking but not with callose apposition or hypersensitive response

2014

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Powdery mildew caused by Erysiphe pisi DC is an important pea disease which causes high yield and quality losses. The most efficient way to control this disease is the use of resistant cultivars. Three genes of resistance are known so far in pea, namely er1, er2 and Er3. The most widely deployed gene in pea cultivars worldwide is er1. Resistance conferred by er1 is complete and considered to be durable, being recently demonstrated that er1 is in fact a member of the mlo gene family. Resistance is caused by colony abortion albeit the responsible cellular mechanisms causing this colony abortion are not known. In this study, the presence of different mechanisms related with colony abortion, such as callose apposition, protein cross-linking and hypersensitive response was quantified in a resistant pea er1 line compared to a susceptible check. Our histological studies showed that protein cross-linking, plays a determinant role in the penetration resistance conferred by er1, whereas callose apposition or hypersensitive response played little role.

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Cited by 142 publications

References 95 publications

Unveiling common responses of Medicago truncatula to appropriate and inappropriate rust species

Unveiling common responses of Medicago truncatula to appropriate and inappropriate rust species

Pre and posthaustorial resistance to rusts in Lathyrus cicera L.

Penetration resistance to Erysiphe pisi in pea mediated by er1 gene is associated with protein cross-linking but not with callose apposition or hypersensitive response

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