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GDSL lipase 1 regulates ethylene signaling and ethylene‐associated systemic immunity in Arabidopsis
Author(s) -
Kim Hye Gi,
Kwon Sun Jae,
Jang Young Jin,
Chung Joo Hee,
Nam Myung Hee,
Park Ohkmae K.
Publication year - 2014
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2014.02.062
Subject(s) - arabidopsis , ethylene , lipase , downregulation and upregulation , mutant , microbiology and biotechnology , biology , immune system , immunity , plant disease resistance , biochemistry , chemistry , gene , enzyme , immunology , catalysis
Arabidopsis GDSL lipase 1 (GLIP1) has been shown to modulate systemic immunity through the regulation of ethylene signaling components. Here we demonstrate that the constitutive triple response mutant ctr1‐1 requires GLIP1 for the ethylene response, gene expression, and pathogen resistance. The glip1‐1 mutant was defective in induced resistance following primary inoculation of necrotrophic pathogens, whereas GLIP1 ‐overexpressing plants showed resistance to multiple pathogens. Necrotrophic infection triggered the downregulation of EIN3 and the activation of ERF1 and SID2 in a GLIP1‐dependent manner. These results suggest that GLIP1 positively and negatively regulates ethylene signaling, resulting in an ethylene‐associated, necrotroph‐induced immune response.