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50 results for “Root-knot nematode”
Figure 4 in Identification of root-knot nematodes (Meloidogyne spp.) from greenhouses in the Middle Black Sea Region of Turkey
Figure 4. Amplification products (420 bp) with Far/Rar primers on Meloidogyne populations from the Middle Black Sea Region. Sa: Samsun populations, Si: Sinop populations, Or: Ordu population, Co: Çorum populations, To: Tokat populations, Am: Amasya populations, C: control population, W: water, M: molecular marker with 100 bp.
Figure 5 in Identification of root-knot nematodes (Meloidogyne spp.) from greenhouses in the Middle Black Sea Region of Turkey
Figure 5. Amplification products (670 bp) with Fjav/Rjav primers on Meloidogyne populations from the Middle Black Sea Region. Sa: Samsun populations, Si: Sinop populations, Co: Çorum population, C: control population, W: water, M: molecular marker with 100 bp.
Root-knot nematode infection of Brassica rapa enhances the performance of a specialist root herbivore via systemically induced responses
<p>Herbivores sharing host plants are often temporally and spatially separated, limiting direct interactions between them. Nevertheless, they can reciprocally influence each other via systemically induced plant responses, as observed in numerous study systems. In contrast, examples of such plant-mediated interactions between belowground herbivores are scarce, but we postulated that they similarly occur given the large diversity of root-interacting soil organisms. To test this hypothesis, we analyzed the performance of <em>Delia radicum</em> larvae feeding on main roots of <em>Brassica rapa </em>plants whose fine roots were infected by the root-knot nematode <em>Meloidogyne incognita</em>. Simultaneously, we studied the effects of <em>M. incognita</em> on <em>D. radicum</em>-induced defense responses and the accumulation of primary metabolites in the main root. We observed that almost 1.5 times as many <em>D. radicum</em> adults emerged from nematode-infected plants, indicating a facilitation effect of <em>M. incognita</em> infection.<em> </em>Although we observed increases in the accumulation of proteins and two essential amino-acids, the strongest effect of nematode-infection was visible in the defense response to <em>D. radicum</em>. We observed a 1.5 times higher accumulation of the defense-related phytohormone JA-Ile in response to <em>D. radicum</em> on nematode-infected plants, coinciding with a 75% increase in indole glucosinolate concentrations. Contrastingly, concentrations of aliphatic glucosinolates, secondary metabolites negatively affecting <em>D. radicum</em>, were 10-25% lower in nematode<em>-</em>infected plants. We hypothesize that the attenuated aliphatic glucosinolate concentrations result from antagonistic interactions between biosynthetic pathways of both glucosinolate classes, which was reflected in the expression of key biosynthesis genes. Our results provide explicit evidence of plant-mediated interactions between belowground organisms via systemically induced responses in roots.</p>
Transcriptome profiling of potato (Solanum tuberosum L.) responses to root-knot nematode (Meloidogyne javanica) infection during a compatible interaction
<p>Supplementary data</p>
Data from: Integrative taxonomy of root-knot nematodes reveals multiple independent origins of mitotic parthenogenesis
During sampling of several Coffea arabica plantations in Tanzania severe root galling, caused by a root-knot nematode was observed. From pure cultures, morphology and morphometrics of juveniles and females matched perfectly with Meloidogyne africana, whereas morphology of the males matched identically with those of Meloidogyne decalineata. Based on their Cox1 sequence, however, the recovered juveniles, females and males were confirmed to belong to the same species, creating a taxonomic conundrum. Adding further to this puzzle, re-examination of M. oteifae type material showed insufficient morphological evidence to maintain its status as a separate species. Consequently, M. decalineata and M. oteifae are synonymized with M. africana, which is herewith redescribed based on results of light and scanning electron microscopy, ribosomal and mitochondrial DNA sequences, isozyme electrophoresis, along with bionomic and cytogenetic features. Multi-gene phylogenetic analysis placed M. africana outside of the three major clades, together with M. coffeicola, M. ichinohei and M. camelliae. This phylogenetic position was confirmed by several morphological features, including cellular structure of the spermatheca, egg mass position, perineal pattern and head shape. Moreover, M. africana was found to be a polyphagous species, demonstrating that "early-branching" Meloidogyne spp. are not as oligophagous as had previously been assumed. Cytogenetic information indicates M. africana (2n = 21) and M. ardenensis (2n = 51–54) to be a triploid mitotic parthenogenetic species, revealing at least four independent origins of mitotic parthenogenesis within the genus Meloidogyne. Furthermore, M. mali (n = 12) was found to reproduce by amphimixis, indicating that amphimictic species with a limited number of chromosomes are widespread in the genus, potentially reflecting the ancestral state of the genus. The wide variation in chromosome numbers and associated changes in reproduction modes indicate that cytogenetic evolution played a crucial role in the speciation of root-knot nematodes and plant-parasitic nematodes in general.
Figure 2 from: Karssen G, Liao J, Kan Z, van Heese E, den Nijs L (2012) On the species status of the root-knot nematode Meloidogyne mayaguensis Rammah & Hirschmann, 1988. ZooKeys 181: 67-77. https://doi.org/10.3897/zookeys.181.2787
Figure 2 - LM photographs of second-stage juvenile tails of Meloidogyne mayaguensis (A) and Meloidogyne enterolobii (B). Bar = 5 µm.
Figure 1 from: Karssen G, Liao J, Kan Z, van Heese E, den Nijs L (2012) On the species status of the root-knot nematode Meloidogyne mayaguensis Rammah & Hirschmann, 1988. ZooKeys 181: 67-77. https://doi.org/10.3897/zookeys.181.2787
Figure 1 - LM photographs of perineal patterns of Meloidogyne mayaguensis (A, B) and Meloidogyne enterolobii (C, D). Bar = 25 µm.
Figure 4 from: Karssen G, Ahmed M, van de Vossenberg B, Cornelisse C (2013) On the species status of the root-knot nematode Meloidogyne ulmi Palmisano & Ambrogioni, 2000 (Nematoda, Meloidogynidae). ZooKeys 362: 1-27. https://doi.org/10.3897/zookeys.362.6352
Figure 4 - Bayesian tree inferred from part of 18S rRNA using TYMef + I model. Sequences were aligned with MAFFT alignment. Numbers near the nodes indicate posterior probabilities. NCBI accession numbers are listed with the species names.
Figure 3 from: Karssen G, Ahmed M, van de Vossenberg B, Cornelisse C (2013) On the species status of the root-knot nematode Meloidogyne ulmi Palmisano & Ambrogioni, 2000 (Nematoda, Meloidogynidae). ZooKeys 362: 1-27. https://doi.org/10.3897/zookeys.362.6352
Figure 3 - Isozyme phenotypes from ten individual females of Meloidogyne ulmi from "Mierenbos". A Esterase B Malate dehydrogenase. Meloidogyne ulmi (1–5 and 8–12); Meloidogyne javanica (6 and 7) as reference marker.
Figure 2 from: Karssen G, Ahmed M, van de Vossenberg B, Cornelisse C (2013) On the species status of the root-knot nematode Meloidogyne ulmi Palmisano & Ambrogioni, 2000 (Nematoda, Meloidogynidae). ZooKeys 362: 1-27. https://doi.org/10.3897/zookeys.362.6352
Figure 2 - LM photographs of males anterior part and second- stage juvenile tails of Meloidogyne mali (A, C, E) and Meloidogyne ulmi (B, D, F), bar = 10 µm.
Figure 1 from: Karssen G, Ahmed M, van de Vossenberg B, Cornelisse C (2013) On the species status of the root-knot nematode Meloidogyne ulmi Palmisano & Ambrogioni, 2000 (Nematoda, Meloidogynidae). ZooKeys 362: 1-27. https://doi.org/10.3897/zookeys.362.6352
Figure 1 - LM photograph of perineal patterns and anterior parts of female Meloidogyne mali (A, C, E, G) and Meloidogyne ulmi (B, D, F), bar = 10 µm.
Figure 6 from: Karssen G, Ahmed M, van de Vossenberg B, Cornelisse C (2013) On the species status of the root-knot nematode Meloidogyne ulmi Palmisano & Ambrogioni, 2000 (Nematoda, Meloidogynidae). ZooKeys 362: 1-27. https://doi.org/10.3897/zookeys.362.6352
Figure 6 - Root gall symptoms of Meloidogyne mali infection on (A, B) Maluspumila "M9" (C, D) Ulmus davidiana var. japonica and (E, F) Solanum lycopersicum.
Figure 5 from: Karssen G, Ahmed M, van de Vossenberg B, Cornelisse C (2013) On the species status of the root-knot nematode Meloidogyne ulmi Palmisano & Ambrogioni, 2000 (Nematoda, Meloidogynidae). ZooKeys 362: 1-27. https://doi.org/10.3897/zookeys.362.6352
Figure 5 - Bayesian tree inferred from part of D2 D3 of 28S rRNA using TYM + G model. Sequences were aligned with MAFFT alignment. Numbers near the nodes indicate posterior probabilities. NCBI accession numbers are listed with the species names.
Data from: Integrative taxonomy of root-knot nematodes reveals multiple independent origins of mitotic parthenogenesis
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Genome-wide shifts in histone modification patterns at early stage of rice infection with root-knot nematode Meloidogyne graminicola
GEO Series GSE152783. Oryza sativa Japonica Group. 6 samples. Type: Expression profiling by high throughput sequencing.
Biological Control of Root-Knot Nematode Meloidogyne incognita Infection of Tomato (Solanum lycopersicum L.) by the Oomycete Biocontrol Agent Pythium oligandrum
GEO Series GSE262653. Solanum lycopersicum. 6 samples. Type: Expression profiling by high throughput sequencing.
Genome-wide identification and characterization of miRNAome from tomato roots (Solanum lycopersicum) and root-knot nematode (Meloidogyne incognita) during susceptible and resistant interactions.
GEO Series GSE87651. Solanum lycopersicum. 11 samples. Type: Non-coding RNA profiling by high throughput sequencing.
Ascorbate oxidation primes rice plants for enhanced defence against root-knot nematode Meloidogyne graminicola through jasmonate/ethylene-activation
GEO Series GSE125427. Oryza sativa Japonica Group. 12 samples. Type: Expression profiling by high throughput sequencing.
Genome-wide shifts in histone modification patterns at early stage of rice infection with root-knot nematode Meloidogyne graminicola
GEO Series GSE145501. Oryza sativa Japonica Group. 17 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
Identification of Novel and Conserved MicroRNAs of Root-knot Nematode Using a Deep-sequencing Approach
GEO Series GSE24833. Capsicum annuum; Meloidogyne incognita. 2 samples. Type: Non-coding RNA profiling by high throughput sequencing.
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