Initial responses of the trap‐crop, Solanum sisymbriifolium, to Globodera pallida invasions

Many researchers today are looking for mechanisms underlying plant defenses against nematodes by identifying differentially expressed genes in domesticated hosts. In order to provide a different perspective, we analyzed the root transcriptome of an undomesticated non‐host species, Solanum sisymbriif...

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Bibliographic Details
Published in:The plant genome 2020-07, Vol.13 (2), p.e20016-n/a
Main Authors: Wixom, Alexander Q., Casavant, N. Carol, Sonnen, Timothy J., Kuhl, Joseph C., Xiao, Fangming, Dandurand, Louise‐Marie, Caplan, Allan B.
Format: Article
Language:English
Subjects:
Cell death
Chitinase
Crops
Eggs
Ethanol
Flowers & plants
Gene expression
Globodera pallida
Hormones
Infections
Methyl jasmonate
Nematodes
Pathogens
Proteins
Reactive oxygen species
Salicylic acid
Solanum sisymbriifolium
Spectrum analysis
Transcriptomes
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Summary:Many researchers today are looking for mechanisms underlying plant defenses against nematodes by identifying differentially expressed genes in domesticated hosts. In order to provide a different perspective, we analyzed the root transcriptome of an undomesticated non‐host species, Solanum sisymbriifolium Lamark (SSI) before and after Globodera pallida infection. Utilizing RNAseq analyses, we identified changes in the expression of 277 transcripts. Many of these genes were not annotated; however, the annotated set included peroxidases, reactive oxygen species‐producing proteins, and regulators of cell death. Importantly, 60% of the nematode‐responsive genes did not respond to physical damage to root tissues, or to exogenous treatments with either salicylic acid or methyl jasmonate. Based on this, we speculate that the majority of changes in SSI gene expression were promoted by either nematode effectors, pathogen‐associated molecular patterns (PAMPs), or by exposure to untested endogenous signaling molecules such as ethylene, or by exposure to multiple stimuli. This study incorporates our findings into a model that accounts for part of this plant's unusual resistance to nematodes.
ISSN:1940-3372
1940-3372
DOI:10.1002/tpg2.20016