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Identification and Characterization of Wall-Associated Kinase (WAK) and WAK-like (WAKL) Gene Family in Juglans regia and Its Wild Related Species Juglans mandshurica.


ABSTRACT: Wall-associated kinase (WAK) and WAK-like kinase (WAKL) are receptor-like kinases (RLKs), which play important roles in signal transduction between the cell wall and the cytoplasm in plants. WAK/WAKLs have been studied in many plants, but were rarely studied in the important economic walnut tree. In this study, 27 and 14 WAK/WAKL genes were identified in Juglans regia and its wild related species Juglans mandshurica, respectively. We found tandem duplication might play a critical role in the expansion of WAK/WAKL gene family in J. regia, and most of the WAK/WAKL homologous pairs underwent purified selection during evolution. All WAK/WAKL proteins have the extracellular WAK domain and the cytoplasmic protein kinase domain, and the latter was more conserved than the former. Cis-acting elements analysis showed that WAK/WAKL might be involved in plant growth and development, plant response to abiotic stress and hormones. Gene expression pattern analysis further indicated that most WAK/WAKL genes in J. regia might play a role in the development of leaves and be involved in plant response to biotic stress. Our study provides a new perspective for the evolutionary analysis of gene families in tree species and also provides potential candidate genes for studying WAK/WAKL gene function in walnuts.

SUBMITTER: Li M 

PROVIDER: S-EPMC8775259 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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Identification and Characterization of Wall-Associated Kinase (WAK) and WAK-like (WAKL) Gene Family in <i>Juglans regia</i> and Its Wild Related Species <i>Juglans mandshurica</i>.

Li Mengdi M   Ma Jiayu J   Liu Hengzhao H   Ou Mengwei M   Ye Hang H   Zhao Peng P  

Genes 20220112 1


Wall-associated kinase (WAK) and WAK-like kinase (WAKL) are receptor-like kinases (RLKs), which play important roles in signal transduction between the cell wall and the cytoplasm in plants. <i>WAK/WAKLs</i> have been studied in many plants, but were rarely studied in the important economic walnut tree. In this study, 27 and 14 <i>WAK/WAKL</i> genes were identified in <i>Juglans regia</i> and its wild related species <i>Juglans mandshurica</i>, respectively. We found tandem duplication might pla  ...[more]

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