OsBBS1,OsRLCK109,LMM24

| Categories genes  | Tags leaf  leaf senescence  early leaf senescence  senescence  map-based cloning  salt  salt stress  stress  chloroplast  growth  resistance  defense  defense response  blast  magnaporthe oryzae  cell death  Kinase  lesion  lesion mimic 
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  • Key message
    • A guanine insert in OsBBS1 leads to early leaf senescence and salt stress sensitivity in rice (Oryza sativa L.).
    • Transgenic LOC_Os03g24930 knockout plants generated by a CRISPR/Cas9 strategy exhibited similar early leaf senescence phenotypes as did the bbs1 mutant, which confirmed that LOC_Os03g24930 was the OsBBS1 gene
    • The OsBBS1 gene was cloned by a map-based cloning strategy, and a guanine (G) insertion was found in the first exon of LOC_Os03g24930
    • The expression of OsBBS1 could be greatly induced by salt stress, and the bbs1 mutant exhibited hypersensitivity to salt stress
    • Chloroplast degradation was observed in lmm24 leaves, with decreased expression of photosynthesis-related genes and increased expression of the senescence-induced STAYGREEN (SGR) gene and other senescence-associated genes
    • The lmm24 mutant displayed dark brown lesions in leaves and growth retardation that were not observed in wild-type ZH8015
    • Furthermore, lmm24 exhibited enhanced resistance to rice blast fungus Magnaporthe oryzae (M
    • LMM24 Encodes Receptor-Like Cytoplasmic Kinase 109, Which Regulates Cell Death and Defense Responses in Rice.
    • Our data demonstrate that LMM24 regulates cell death and defense responses in rice
    • The results of histochemical staining and TUNEL assays showed enhanced ROS accumulation and cell death in lmm24
    • The LMM24 gene was identified by MutMap, and LMM24 was confirmed as a receptor-like cytoplasmic kinase 109 by amino acid sequence analysis
    • We identified a new rice lesion mimic mutant lmm24 from a mutant pool of indica rice cultivar "ZhongHui8015"
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