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Solanum torvum transcriptional responses to nematodes

ABSTRACT: Solanum torvum Sw is worldwide employed as rootstock for eggplant cultivation because of its vigour and resistance/tolerance to the most serious soil-borne diseasesas bacterial, fungal wilts and root-knot nematodes. A 30,0000 features custom combimatrix chip was designed and microarray hybridizations were conducted for both control and 14 dpi (day post inoculation) with Meloidogyne incognita-infected roots samples. We also tested the chip with samples from the phylogenetically-related nematode-susceptible eggplant species Solanum melongena.The genes identified from S. torvum catalogue, bearing high homology to knownnematode resistance genes, were further investigated in view of their potential role in the nematode resistance mechanism.

ORGANISM(S): Solanum torvum Solanum virginianum

PROVIDER: GSE47008 | GEO | 2013/11/01

SECONDARY ACCESSION(S): PRJNA203270

REPOSITORIES: GEO

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Solanum torvum transcriptional responses to nematodes

Project description:Solanum torvum Sw is worldwide employed as rootstock for eggplant cultivation because of its vigour and resistance/tolerance to the most serious soil-borne diseasesas bacterial, fungal wilts and root-knot nematodes. A 30,0000 features custom combimatrix chip was designed and microarray hybridizations were conducted for both control and 14 dpi (day post inoculation) with Meloidogyne incognita-infected roots samples. We also tested the chip with samples from the phylogenetically-related nematode-susceptible eggplant species Solanum melongena.The genes identified from S. torvum catalogue, bearing high homology to knownnematode resistance genes, were further investigated in view of their potential role in the nematode resistance mechanism. total RNA was extracted from control and 14 days post-infection (infection with root-knot nematode Meloidogyne incognita) from roots of Solanum torvum and Solanum melongena. Three biological replicates were used for each condition and genotype for a total of 12 samples.

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Project description:111,556,278 high-quality reads were obtained by a deep-sequencing approach that show an exact match to the genome of Meloidogyne incognita from the library of J2 juveniles of M. incognita (Mi). Based on these Solexa reads, 89 M. incognita microRNA genes were identified, which grouped into 67 non-redundant miRNAs with mature sequences. All of these candidate miRNAs were confirmed by qRT-PCR, and 26 of them could be detected in the library of the galls of cucumber root infected by M. incognita (GC). MiR-100 was found in a cluster with let-7, which is similar with B. malayi, a human parasitic nematode. Based on the results of deep sequencing, the expression of miR-100 was much more abundant than that of let-7, which indicated that they may not be co-expressed. The ortholog of let-7, a key regulator that controls the nematode from L4 to adult in C. elegans, could be frequently sequenced in the GC library, the later stages of development of M. incognita, while it had a relative low expression level in J2, which indicated that let-7 may have a similar role in the development regulation in plant parasitic nematodes. Frequently sequenced microRNAs, including miR-71, miR-100 and miR-124, should play an important role in the growth and proliferation of M. incognita.

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