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Hiroaki Kato,Takuhiro Shida,Yoshibumi Komeda,Tamao Saito,Atsushi Kato 한국식물학회 2011 Journal of Plant Biology Vol.54 No.3
The protein encoded by the activated disease resistance 1-like1 (ADR1-L1) gene (locus name, At4g33300)belongs to the activated disease resistance 1 (ADR1) family of coiled-coil nucleotide-binding site leucine-rich repeat-type disease resistance proteins. This family contains four proteins and they have specific features in their amino acid sequences. It has been reported that ADR1 protein belongs to the ADR1family, which is related to not only defense response but also drought tolerance. We found that transgenic plants overexpressing the ADR1-L1 gene showed a dwarf phenotype and morphological change in leaves. The expression levels of defense-related genes and the resistance to Pseudomonas syringae pv. tomato DC3000 were increased in transgenic plants. However, enhancement of drought tolerance and activation of abiotic response genes were not observed. When the growth temperature was changed from 22°C to 28°C, the expression of defense-related genes and the enhancement of resistance to a bacterial pathogen were suppressed and the dwarf phenotype and morphological change of leaves recovered.
Atsushi Kato,Hiroaki Kato,Takuhiro Shida,Tamao Saito,Yoshibumi Komeda 한국식물학회 2009 Journal of Plant Biology Vol.52 No.6
Comparative analysis of nucleotide sequences of the genomic region located around 100 map unit of chromosome 1 using two accessions, Columbia (Col) and Landsberg erecta (Ler), of Arabidopsis thaliana was performed. High divergence was detected between them, and the length of the Ler sequence was half of corresponding sequence of Col. This divergence occurred by tandem duplication, deletion of large regions, and insertion of unrelated sequences. These events led to the high polymorphism of plant disease resistant genes, which are located in the analyzed region. It is highly probable that two-round duplication occurred, and the insertion sequences are transposable elements. The data suggest that the analyzed region had been evolving until quite recently.