Transcriptome Analysis of Cotton (Gossypium hirsutum L.) Genotypes That Are Susceptible, Resistant, and Hypersensitive to Reniform Nematode (Rotylenchulus reniformis)

• Published in: PloS one Vol. 10; no. 11; p. e0143261
• Main Authors: Li, Ruijuan, Rashotte, Aaron M., Singh, Narendra K., Lawrence, Kathy S., Weaver, David B., Locy, Robert D.
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 16.11.2015; Public Library of Science (PLoS)
• Subjects: Animals; Biology; Cell walls; Cloning; Cotton; Crop yield; Disease Resistance - genetics; Functional analysis; Gene expression; Gene Expression Profiling; Gene Expression Regulation, Plant; Gene mapping; Gene regulation; Gene sequencing; Genes; Genetic aspects; Genomes; Genomics; Genotype; Genotype & phenotype; Genotypes; Germplasm; Gossypium; Gossypium - genetics; Gossypium - parasitology; Gossypium hirsutum; Hypersensitivity; Infestation; Loci; Metabolism; Microsatellite Repeats; Nematodes; Pathogenesis; Peptide mapping; Plant Diseases - genetics; Plant Diseases - parasitology; Plant Roots - genetics; Plant Roots - metabolism; Plant Roots - parasitology; Proteins; Quantitative genetics; Quantitative Trait Loci; Redox reactions; Ribonucleic acid; RNA; Rotylenchulus reniformis; Roundworms; Sequence Analysis, RNA; Signal transduction; Signaling; Transcription; Transcription factors; Tylenchoidea - physiology; United States; Alabama; United States > US
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0143261

Reniform nematode is a semi-endoparasitic nematode species causing significant yield loss in numerous crops, including cotton (Gossypium hirsutum L.). An RNA-sequencing analysis was conducted to measure transcript abundance in reniform nematode susceptible (DP90 & SG747), resistant (BARBREN-713), and hypersensitive (LONREN-1) genotypes of cotton (Gossypium hirsutum L.) with and without reniform nematode infestation. Over 90 million trimmed high quality reads were assembled into 84,711 and 80, 353 transcripts using the G. arboreum and the G. raimondii genomes as references. Many transcripts were significantly differentially expressed between the three different genotypes both prior to and during nematode pathogenesis, including transcripts corresponding to the gene ontology categories of cell wall, hormone metabolism and signaling, redox reactions, secondary metabolism, transcriptional regulation, stress responses, and signaling. Further analysis revealed that a number of these differentially expressed transcripts mapped to the G. raimondii and/or the G. arboreum genomes within 1 megabase of quantitative trait loci that had previously been linked to reniform nematode resistance. Several resistance genes encoding proteins known to be strongly linked to pathogen perception and resistance, including LRR-like and NBS-LRR domain-containing proteins, were among the differentially expressed transcripts mapping near these quantitative trait loci. Further investigation is required to confirm a role for these transcripts in reniform nematode susceptibility, hypersensitivity, and/or resistance. This study presents the first systemic investigation of reniform nematode resistance-associated genes using different genotypes of cotton. The candidate reniform nematode resistance-associated genes identified in this study can serve as the basis for further functional analysis and aid in further development of reniform a nematode resistant cotton germplasm.