Effect of the green manures &lt;i&gt;Sinapis alba&lt;/i&gt;, &lt;i&gt;Brassica napus&lt;/i&gt; and &lt;i&gt;Raphanus sativus&lt;/i&gt; on hatching of &lt;i&gt;Globodera rostochiensis&lt;/i&gt;

Valdes, Yirina; Perry, R. N.; Viaene, Nicole; Moens, Maurice

doi:10.1163/138855411x571803

Cited by 11 publications

(3 citation statements)

References 12 publications

(14 reference statements)

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“…Extracts of green manures did not increase the dorsal gland nucleolus, at least during 24 h of exposure. It was expected that extracts of green manures would have similar effects to those of diffusâtes of green manures, as observed in the study of Valdes et al (2011); pre-exposure of G. rostochiensis to diffusâtes and extracts of green manures resulted in similar values for subsequent hatch in TRD (from 85-93% for diffusâtes and from 71-89% for extracts) and, at the same time, this hatch was higher than that obtained from cysts that were pretreated with DW (55%) or continuously exposed to TRD (71%). It is also known that the diameter of the pharyngeal gland nucleolus is an indirect indication of hatching and that the bigger the nucleolus gets, the more likely the J2 is going to hatch (Holz et al, 1998).…”

Section: Discussionmentioning

confidence: 83%

“…Recently, Valdes et al (2011) found that pre-exposure of cysts to root diffusâtes and plant extracts from three brassicaceous species could stimulate the subsequent hatch of G. rostochiensis without causing any negative effect on their viability. Notably, the number of J2 that hatched was greater than in treatments where cysts were only exposed to tomato root diffusate (TRD).…”

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confidence: 99%

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Changes in the pre-parasitic developmental stage of Globodera rostochiensis in response to green manures

Valdes¹,

Viaene²,

Blok

et al. 2012

Nematol

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The sequence of events during the pre-parasitic and parasitic stages of the life cycle of Globodera rostochiensis, starting from hatching until host invasion and infection, is of major importance. Many of the physiological changes are initiated in the preparasitic stage in response to the influences exerted by the root diffusates of the host plant. The objectives of this study were to investigate whether root diffusates and extracts of green manures from Brassicaceae, in particular yellow mustard, fodder radish and rapeseed, have a direct effect on the pre-parasitic stage of G. rostochiensis. Unhatched second-stage juveniles (J2) were exposed to root diffusates and extracts from roots or above-ground parts of the green manures to assess: i) changes in eggshell permeability; ii) changes in diameter of the dorsal gland nucleolus; and iii) the activation of transcription in the dorsal and subventral pharyngeal glands. The 24 h exposure of unhatched J2 to the green manures did not indicate an alteration in eggshell permeability. The diameter of the dorsal gland nucleolus increased significantly after exposure to diffusates but not to extracts of the green manures, although the size in that case still did not exceed the measurements in J2 exposed to tomato root diffusates. The expression of the gene IVg9 in the dorsal gland was not detected after any treatment. However, transcriptional activation in the subventral pharyngeal glands was observed. Although the maximum expression of the cellulase gene was found in J2 exposed to tomato root diffusates, the expression in J2 exposed to root extracts of green manures was higher than in J2 exposed to root diffusates and extracts of above-ground plant parts. The potential of the investigated brassicaceous green manures to influence the pre-parasitic stage of G. rostochiensis is discussed

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Section: Discussionmentioning

confidence: 83%

mentioning

confidence: 99%

Changes in the pre-parasitic developmental stage of Globodera rostochiensis in response to green manures

Valdes¹,

Viaene²,

Blok

et al. 2012

Nematol

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“…Strategies for control of plant-parasitic nematodes in clude breeding and engineering of resistant cultivars (Williamson & Kumar, 2006;Liu et al, 2012;Khallouk et al, 2013;Kim & Diers, 2013;Lin et al, 2013), biologically-based methods involving cover crops, soil amendments, or direct use of phytochemicals (Oka, 2010;Valdes et al, 2011;Ntalli & Caboni, 2012), soil microor ganisms (Lee et al, 2013;Martinuz et al, 2013) and cul tural practices. All face their own difficulties and varying levels of success (McCarter, 2009).…”

Section: Molecular Biology and Parasitismmentioning

confidence: 99%

Targeting internal processes of plant-parasitic nematodes in the pursuit of novel agents for their control

Masler

2014

Nematol

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The success of plant-parasitic nematodes as competitors with humans for crops is evidenced by the parasites' significant and continuous economic drain on global agriculture. Scientific efforts dedicated to the control of plant-parasitic nematodes employ strategies from the environmental to molecular levels. Understanding the interaction of the nematode with its environment, and the molecules involved, offers great promise for novel control agent development. Perhaps more significantly, such knowledge facilitates the generation of ever more detailed and sophisticated information on nematode biology and new molecular targets. Among the most economically important groups of plant-parasitic nematodes are those comprising the cyst-forming species and the root-knot nematodes. Presented here is a brief overview of research into the biology of these parasites relative to their life cycles. Recent advances in elucidating the molecular biology and biochemistry of nematode-plant interactions during the internal parasitic stages of the life cycle have been driven by advances in genomics and transcriptomics. The remarkable discoveries regarding parasitism, and the application of genetic resources in these findings, provide a template for advanced investigation of external, survival stages biology. While survival biology research lags somewhat behind that of parasitism with regard to the molecular genetics of signalling and response, its extensive catalogue promises explosive rates of discovery as progress in genomics and transcriptomics allows a molecular genetic examination of embryogenesis, dormancy and hatching. Our group is interested in behaviour, development and hatching of cyst and root-knot nematodes, and the effects of the environment on the mechanisms of these activities. Phytochemical and temperature effects are discussed, and evidence is presented that the cyst may provide useful molecules for exploring nematode physiology.

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Biofumigation with Brassica juncea, Raphanus sativus and Eruca sativa for the management of field populations of the potato cyst nematode Globodera pallida

Ngala

Haydock

Woods

et al. 2014

Pest Management Science

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Effect of the green manures <i>Sinapis alba</i>, <i>Brassica napus</i> and <i>Raphanus sativus</i> on hatching of <i>Globodera rostochiensis</i>

Cited by 11 publications

References 12 publications

Changes in the pre-parasitic developmental stage of Globodera rostochiensis in response to green manures

Changes in the pre-parasitic developmental stage of Globodera rostochiensis in response to green manures

Targeting internal processes of plant-parasitic nematodes in the pursuit of novel agents for their control

Biofumigation with Brassica juncea, Raphanus sativus and Eruca sativa for the management of field populations of the potato cyst nematode Globodera pallida

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