期刊
PLANT JOURNAL
卷 62, 期 3, 页码 518-528出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1365-313X.2010.04169.x
关键词
floral transition; plant immunity; WNK kinase; FLOWERING LOCUS C; protein-protein interaction
资金
- National Science Foundation [IOS-0724838-003]
P>Arabidopsis thaliana EDM2 was previously shown to be specifically required for disease resistance mediated by the R protein RPP7. Here we provide additional data showing that the role of EDM2 in plant immunity is limited and does not include a function in basal defense. In addition, we found that EDM2 has a promoting effect on the floral transition. We further found that the protein kinase WNK8 physically interacts with EDM2 in the nucleus. Unlike EDM2, which serves as a substrate of this kinase, WNK8 appears not to be required for RPP7-mediated defense. As reported previously, however, WNK8 does affect flowering time. Epistasis analyses suggested that EDM2 acts upstream of the floral repressor FLC (AT5G10140) and downstream of WNK8 (AT5G41990) in a regulatory module that resembles the autonomous floral promotion pathway, comprising a set of mechanisms that are known to affect the floral transition by regulating FLC transcript levels.
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