Transcriptome profiles in compatible and incompatible interactions between soybean and Fusarium oxysporum.

Alessandra Lanubile, Adriano Marocco, Usha Muppirala, Andrew Severin, Gary Munkvold

Risultato della ricerca: Contributo in libroContributo a convegno

Abstract

Fusarium oxysporum is one of the most common species causing soybean root rot and seedling blight in the U.S. In a recent study, significant variation in aggressiveness was observed among isolates of F. oxysporum collected from roots in Iowa, ranging from highly pathogenic to weakly or non-pathogenic isolates. In the present work, a RNA-seq-based analysis was used for the first time to investigate the molecular aspect of the interaction of a partially resistant soybean genotype with non-pathogenic/pathogenic isolates of F. oxysporum at 72 and 96 hours post inoculation (hpi). Markedly different gene expression profiles were observed in compatible and incompatible host-pathogen combinations. A peak of differentially expressed genes (DEGs) was observed at 72 hpi in soybean roots in response to both isolates, although the number of DEGs was about eight times higher for the pathogenic isolate compared to the non-pathogenic one (1,659 vs. 203 DEGs, respectively). Furthermore, not only the number of genes, but also the magnitude of induction was much greater in response to the pathogenic isolate. This response included a stronger activation of many well-known defense-related genes, and several genes involved in ethylene biosynthesis and signalling, transcription factors, secondary and sugar metabolism. In addition, 1130 fungal genes were differentially expressed between the F. oxysporum isolates in planta during the infection process. Interestingly, 10% of these genes encode plant cell-wall degrading enzymes, reactive oxygen species-related enzymes and fungal proteins involved in primary metabolic pathways. Such information may be useful in the development of new methods of broadening resistance of soybean to F. oxysporum, including the silencing of important fungal genes, and also to understand the molecular basis of soybean-F. oxysporum interactions.
Lingua originaleEnglish
Titolo della pubblicazione ospite13th European Fusarium Seminar, Book of abstracts
Pagine139
Numero di pagine1
Stato di pubblicazionePubblicato - 2015
Evento13th European Fusarium Seminar. - Martina Franca
Durata: 10 mag 201514 mag 2015

Seminario

Seminario13th European Fusarium Seminar.
CittàMartina Franca
Periodo10/5/1514/5/15

Keywords

  • Fusarium oxysporum
  • RNA-Seq
  • soybean

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