OsWRKY67

| Categories genes  | Tags growth  resistance  disease  disease resistance  magnaporthe oryzae  nucleus  xoo  transcriptional activator  reactive oxygen species  plant growth  leaf  panicle  salicylic acid  blast  blight  bacterial blight  blight disease 
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  • Key message
    • Overexpression of OsWRKY67 in rice confirmed enhanced disease resistance, but led to a restriction of plant growth in transgenic lines with high levels of OsWRKY67 protein
    • OsWRKY67 Plays a Positive Role in Basal and XA21-Mediated Resistance in Rice.
    • Activation of OsWRKY67 by T-DNA tagging significantly improved the resistance against two rice pathogens, Magnaporthe oryzae and Xanthomonas oryzae pv
    • OsWRKY67 RNAi lines significantly reduced resistance to M
    • oryzae and Xoo isolates tested, and abolished XA21-mediated resistance, implying the possibility of broad-spectrum resistance from OsWRKY67
    • Therefore, these results suggest that OsWRKY67 positively regulates basal and XA21-mediated resistance, and is a promising candidate for genetic improvement of disease resistance in rice
    • Transcriptional activity and subcellular localization assays indicated that OsWRKY67 is present in the nucleus where it functions as a transcriptional activator
    • Reactive oxygen species (ROS) rapidly accumulated in OsWRKY67 activation mutant lines in response to elicitor treatment, compared with the controls
    • Here, we identified that the transcription of OsWRKY67 was strongly activated by leaf and panicle blast infection
    • Rice plants overexpressing OsWRKY67 showed quantitatively enhanced resistance to leaf blast, panicle blast and bacterial blight
    • These results together suggest the positive role of OsWRKY67 in regulating rice responses to leaf blast, panicle blast and bacterial blight disease
    • OsWRKY67 positively regulates blast and bacteria blight resistance by direct activation of PR genes in rice.
    • RNA-seq analysis indicated that OsWRKY67 induces the transcription of a set of defense-related genes including the ones involved in the salicylic acid (SA)-dependent pathway
    • In contrast, silencing of OsWRKY67 increased the susceptibility to blast and bacterial blight diseases
    • OsWRKY67 is ubiquitously expressed and sub-localized in the nucleus
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