Journal Article

Salicylic Acid Induces the Expression of a Number of Receptor-Like Kinase Genes in <i>Arabidopsis thaliana</i>

Yuhko Ohtake, Taku Takahashi and Yoshibumi Komeda

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 41, issue 9, pages 1038-1044
Published in print September 2000 | ISSN: 0032-0781
Published online September 2000 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcd028
Salicylic Acid Induces the Expression of a Number of Receptor-Like Kinase Genes in Arabidopsis thaliana

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Receptor-like protein kinases (RLKs) are encoded by a divergent multigene family and their functions have been implicated in a wide range of signal transduction pathways. In this study, we examined the effect of salicylic acid (SA) on the expression of RLK genes in Arabidopsis thaliana. RNA gel blot analysis revealed that transcripts of RKC1 and a number of its homologs, whose translation products contain C-X8-C-X2-C motifs in the putative extracellular domain, accumulated to a higher level in response to SA treatment of plants. The chimeric fusion between the RKC1 5′-upstream region and the β-glucuronidase (GUS) reporter gene reproduced the SA responsiveness in transgenic plants. In addition, some of RLK genes of the leucine-rich repeat (LRR) class and those of the S-domain class were also induced by SA. We found that the upstream regions of these SA-responsive RLK genes contain the TTGAC sequence, which has been suggested to be important for induced expression of many plant defense genes. These results suggest the involvement of a number of RLKs in SA-mediated defense responses.

Keywords: Key words: Arabidopsis thaliana — Gene expression — Receptor-like kinase — Salicylic acid.; Abbreviations: BRI1, BRASSINOSTEROID INSENSITIVE1; CLV1, CLAVATA1; CR4, CRINKLY4; ER, ERECTA; KAPP, kinase-associated protein phosphatase; LRR, leucine-rich repeat; MS medium, Murashige and Skoog medium; RLK, receptor-like kinase; SA, salicyclic acid; SRK, S-locus receptor kinase; WAK, wall-associated kinase.

Journal Article.  4478 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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