OsGLP2-1

| Categories genes  | Tags leaf  resistance  panicle  sheath  disease  blast  disease resistance  jasmonic  ja  jasmonic acid  blight  JA  bacterial blight  pathogen  fungal blast  transcription factor  development  seed  ABA  abscisic acid  ABA  seed development  dormancy 
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  • Key message
    • Overexpression of OsGLP2-1 quantitatively enhanced resistance to leaf blast, panicle blast and bacterial blight
    • The germin-like protein OsGLP2-1 enhances resistance to fungal blast and bacterial blight in rice.
    • In addition to its resistance to blast and bacterial blight, OsGLP2-1 has also been reported to co-localize with a QTLs for sheath blight resistance in rice
    • These suggest that the disease resistance provided by OsGLP2-1 is quantitative and broad spectrum
    • Together, these results suggest that OsGLP2-1 functions as a positive regulator to modulate disease resistance
    • Moreover, OsGLP2-1 was significantly induced by jasmonic acid (JA)
    • Higher endogenous level of JA was also identified in OsGLP2-1 overexpressing plants than in control plants both before and after pathogen inoculation
    • Compared with empty vector transformed (control) plants, the OsGLP2-1 overexpressing plants exhibited higher levels of H2O2 both before and after pathogen inoculation
    • Overexpression of OsGLP2-1 induced three well-characterized defense-related genes which are associated in JA-dependent pathway after pathogen infection
    • We provide evidence that OsGLP2-1 is antagonistically controlled at the transcriptional level by ABA INSENSITIVE5 (ABI5) and GAMYB transcription factors
    • We conclude that OsGLP2-1 acts as a buffer, maintaining appropriate equilibrium for the regulation of primary dormancy during seed development in rice
    • Conversely, overexpression of OsGLP2-1 driven by the OsGLP2-1 native promoter led to greater seed dormancy
    • Seed scutellum-specific expression of OsGLP2-1 was increased by exogenous abscisic acid (ABA), but decreased with gibberellic acid (GA) treatment
    • Using artificial microRNA (miRNA) and CRISPR/CAS9 approaches, suppression of OsGLP2-1 expression in rice resulted in the release of dormancy in immature seeds
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