Nematode Pathogenesis and Resistance in Plants

Williamson, Valerie M.; Hussey, R. S.

doi:10.2307/3870226

Cited by 103 publications

(143 citation statements)

References 42 publications

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“…However, on closer examination, there are similarities in feeding between aphids and nematodes. Nematodes penetrate roots near the tip and migrate intercellularly to a feeding site in the developing vascular cylinder (16). Here, the nematodes initiate the formation of specialized feeder cells in the host from which they derive nutrients, by removing cytoplasmic fluids through the stylet, during their development as endoparasites.…”

Section: Discussionmentioning

confidence: 99%

The nematode resistance geneMiof tomato confers resistance against the potato aphid

Rossi

Goggin

Milligan

et al. 1998

Proc. Natl. Acad. Sci. U.S.A.

664

436

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Resistance against the aphid Macrosiphum euphorbiae previously was observed in tomato and attributed to a novel gene, designated Meu-1, tightly linked to the nematode resistance gene, Mi. Recent cloning of Mi allowed us to determine whether Meu-1 and Mi are the same gene. We show that Mi is expressed in leaves, that aphid resistance is isolate-specific, and that susceptible tomato transformed with Mi is resistant to the same aphid isolates as the original resistant lines. We conclude that Mi and Meu-1 are the same gene and that Mi mediates resistance against both aphids and nematodes, organisms belonging to different phyla. Mi is the first example of a plant resistance gene active against two such distantly related organisms. Furthermore, it is the first isolate-specific insect resistance gene to be cloned and belongs to the nucleotide-binding, leucine-rich repeat family of resistance genes.

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Section: Discussionmentioning

confidence: 99%

The nematode resistance geneMiof tomato confers resistance against the potato aphid

Rossi

Goggin

Milligan

et al. 1998

Proc. Natl. Acad. Sci. U.S.A.

664

436

View full text Add to dashboard Cite

show abstract

“…Infection occurs usually in the vicinity of the root tip where second-stage infective juveniles penetrate the roots and migrate toward the vascular cylinder. Close to the xylem, the nematodes trigger the development of a few giant cells characterised by nuclear and cellular hypertrophy generated via endoreduplication cycles [23]. Formation of giant cells and division of the neighbouring root cells result in the formation of root-knots or galls.…”

Section: Endoreduplication and Differentiation In Plantsmentioning

confidence: 99%

Endoreduplication and activation of the anaphase‐promoting complex during symbiotic cell development

Kondorosi

2004

FEBS Letters

110

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Postembryonic development of plant organs requires a constant interplay between the cell cycle and the developmental programs. Upon endo-and exogenous signals, plant cells can enter, exit or modify the cell cycle. Alteration of mitotic cycles to endoreduplication cycles, where the genome is duplicated without mitosis, is common in plants and may play a role in cell differentiation. The switch from the mitotic to endocycles is regulated by Ccs52A, a plant orthologue of the yeast and animal Cdhl proteins, acting as substrate-specific activator of the anaphase-promoting complex E3 ubiquitin ligase. Here, several aspects of endoreduplication are discussed with special attention on nitrogen-fixing nodule development where endoreduplication is an integral part of symbiotic cell differentiation.

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“…Comprenden distintas especies presentes en una amplia variedad de suelos, desde los cultivados hasta aquellos que no lo son (Doucet, 1991). Los nematodos fitoparásitos pueden causar serios daños a numerosos cultivos, disminuyendo su producción anual (Williamsom y Hussey, 1996) y acortando la vida de las plantas (Cucchi y Becerra, 2009). Particularmente la vid es hospedero de muchas especies de nematodos que son capaces de ocasionar alteraciones, por su acción directa en el desarrollo de sus actividades tróficas (Doucet, 1980) e indirecta por ser vectores de agentes patógenos incluidos los virus (Brown et al, 1995).…”

Section: Introductionunclassified

Caracterización de daños producidos por Meloidogyne Spp. (Nemata: Tylenchida) en la vid en Mendoza, Argentina

Dagatti¹,

Becerra²,

Herrera³

2014

rcia

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El objetivo de esta investigación fue comparar y establecer relaciones entre los diferentes indicadores de crecimiento entre plantas de vid con dos niveles de infestación (alto y leve) de Meloidogyne spp. El estudio se realizó en un viñedo cv Merlot, situado en Agrelo, Mendoza, donde se escogieron 2 parcelas, con y sin nematodos, con diferentes niveles de crecimiento vegetativo. Los indicadores a evaluar fueron: peso y número de racimos por planta, peso de poda, cantidad de entrenudos y área foliar de hojas y feminelas. El grado de infestación de nematodos de cada parcela se determinó mediante la técnica flotación - centrifugación. Para el análisis estadístico se utilizó la prueba de wilcoxon (Mann Whitney U) y el test de student. Además, mediante un análisis de regresión lineal, se comprobó si existía relación entre los indicadores evaluados y la densidad de población de Meloidogyne spp. expresado en número de estados juveniles (J2) presentes en el suelo. Los resultados indicaron que la parcela con menor densidad poblacional de juveniles de Meloidogyne spp., presentó mayor peso promedio de madera de poda, así como también un áreafoliar de hojas y feminelas superior. Con respecto al peso promedio de racimos por planta, dicha parcela también superó a aquella con alta concentración de nematodos.

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Nematode Pathogenesis and Resistance in Plants

Cited by 103 publications

References 42 publications

The nematode resistance geneMiof tomato confers resistance against the potato aphid

The nematode resistance geneMiof tomato confers resistance against the potato aphid

Endoreduplication and activation of the anaphase‐promoting complex during symbiotic cell development

Caracterización de daños producidos por Meloidogyne Spp. (Nemata: Tylenchida) en la vid en Mendoza, Argentina

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