Contrasting Potato Foliage and Tuber Defense Mechanisms against the Late Blight Pathogen Phytophthora infestans.

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PloS one, ISSN: 1932-6203, Vol: 11, Issue: 7, Page: e0159969

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10.1371/journal.pone.0159969; 10.1371/journal.pone.0159969.g003; 10.1371/journal.pone.0159969.g002; 10.1371/journal.pone.0159969.g006; 10.1371/journal.pone.0159969.g007; 10.1371/journal.pone.0159969.g005; 10.1371/journal.pone.0159969.g001; 10.1371/journal.pone.0159969.g004
Liangliang Gao; James M. Bradeen; Sek-Man Wong
Public Library of Science (PLoS); Figshare
Medicine; Biochemistry, Genetics and Molecular Biology; Agricultural and Biological Sciences; Biophysics; Microbiology; Cell Biology; Genetics; Molecular Biology; Ecology; Immunology; 110309 Infectious Diseases; Plant Biology; 59999 Environmental Sciences not elsewhere classified; 69999 Biological Sciences not elsewhere classified; Tuber Defense Mechanisms; WT; RB; Certain ontology bins; SP; Blight Pathogen Phytophthora infestans; potato foliage; blight pathogen Phytophthora infestans; R gene dosage; tuber defense mechanisms; foliar transcriptome responses; tubers; Contrasting Potato Foliage
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The late blight pathogen Phytophthora infestans can attack both potato foliage and tubers. When inoculated with P. infestans, foliage of nontransformed 'Russet Burbank' (WT) develops late blight disease while that of transgenic 'Russet Burbank' line SP2211 (+RB) does not. We compared the foliar transcriptome responses of these two lines to P. infestans inoculation using an RNA-seq approach. A total of 515 million paired end RNA-seq reads were generated, representing the transcription of 29,970 genes. We also compared the differences and similarities of defense mechanisms against P. infestans in potato foliage and tubers. Differentially expressed genes, gene groups and ontology bins were identified to show similarities and differences in foliage and tuber defense mechanisms. Our results suggest that R gene dosage and shared biochemical pathways (such as ethylene and stress bins) contribute to RB-mediated incompatible potato-P. infestans interactions in both the foliage and tubers. Certain ontology bins such as cell wall and lipid metabolisms are potentially organ-specific.