Abstract
Lectin receptor-like kinases (LecRLKs) are a class of membrane proteins found in plants that are involved in diverse functions, including plant development and stress responses. Although LecRLK families have been identified in a variety of plants, a comprehensive analysis has not yet been undertaken in cucumber (Cucumis sativus L.). In this study, 46 putative LecRLK genes were identified in the cucumber genome, including 23 G-type and 22 L-type, and one C-type LecRLK gene. They were unequally distributed on all seven chromosomes, with a clustering tendency. Most of the genes in the cucumber LecRLK (CsLecRLK) gene family lacked introns. In addition, there were many regulatory elements associated with phytohormones and stress on these genes’ promoters. Transcriptome data demonstrated distinct expression patterns of CsLecRLK genes in various tissues. Furthermore, we found that each member of the CsLecRLK family had its own unique expression pattern under hormone and stress treatment by the quantitative real-time PCR (qRT-PCR) analysis. This study provides a better understanding of the character and function of the LecRLK gene family in cucumber and opens up the possibility to exploring the roles that LecRLKs might play in the life cycle of cucumber.
Highlights
In order to better adapt to the living environment, plants have evolved a complete set of signal receptor proteins over the course of their evolution
Lectin receptor-like kinases (LecRLKs), a class of RLKs that contain a lectin domain within the extracellular domain [1], are a gene family that is specialized for sensing external environmental stimuli and transmitting signals
We identified a total of 46 LecRLK genes, named CsLecRLKs, in the cucumber genome through Pfam and SMART search, their coding sequence (CDS) and protein sequences are listed in Supplementary
Summary
In order to better adapt to the living environment, plants have evolved a complete set of signal receptor proteins over the course of their evolution. Cell-surface receptors, a kind of signal receptor proteins, play important roles in receiving and transmitting environmental signals. The receptor-like kinase (RLK) family, one important family of cell surface receptors, contains three domains, such as the extracellular domain, transmembrane domain (TM) and intracellular kinase domain [1]. Lectin receptor-like kinases (LecRLKs), a class of RLKs that contain a lectin domain within the extracellular domain [1], are a gene family that is specialized for sensing external environmental stimuli and transmitting signals. They are localized on the cell membrane, relying on N terminus diverse
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