Molecular Cloning and Characterization of a Wild Eggplant Solanum aculeatissimum NBS-LRR Gene, Involved in Plant Resistance to Meloidogyne incognita

International Journal of Molecular Sciences
Xiaohui ZhouYong Zhuang

Abstract

Root-knot nematodes, Meloidogyne spp., cause considerable damage in eggplant production. Transferring of resistance genes from wild relatives would be valuable for the continued improvement of eggplant. Solanum aculeatissimum, a wild relative of eggplant possessing resistance to Meloidogyne incognita, is potentially useful for genetically enhancing eggplant. In the present study, we have isolated and characterized a nucleotide-binding site leucine-rich repeat (NBS-LRR) resistance gene, designated as SacMi. The full-length cDNA of the SacMi gene was obtained using the technique of rapid-amplification of cDNA ends (RACE). The open reading frame of the SacMi gene was 4014 bp and encoded a protein of 1338 amino acids. Sequence analysis indicated that SacMi belong to the non- Toll/Interleukin-1 receptor (TIR)-NBS-LRR type disease-resistance genes. Interestingly, quantitative RT-PCR showed that SacMi is expressed at low levels in uninfected roots, but was up-regulated by infection with M. incognita. To investigate the role of SacMi in S. aculeatissimum resistance against M. incognica, the tobacco rattle virus (TRV)-mediated virus-induced gene silencing (VIGS) system was used. Silencing of SacMi enhanced susceptibility of S. aculeatis...Continue Reading

References

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Methods Mentioned

BETA
PCR

Software Mentioned

SacMi
Primer
BLASTX
Blastp
ExPASy
COILS
DNAMAN
MEGA
GSDS

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