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- W2891591810 abstract "Co-ordination of auxin and cytokinin activities determines root meristem size during post-embryonic development. Calcineurin B-like proteins (CBLs) and their interacting protein kinases (CIPKs) constitute signaling modules that relay calcium signals. Here we report that CIPK25 is involved in regulating the root meristem size. Arabidopsis plants lacking CIPK25 expression displayed a short root phenotype and a slower root growth rate with fewer meristem cells. This phenotype was rescued by restoration of CIPK25 expression. CIPK25 interacted with CBL4 and -5, and displayed strong gene expression in the flower and root, except in the cell proliferation domain in the root apical meristem. Its expression in the root was positively and negatively regulated by auxin and cytokinin, respectively. The cipk25 T-DNA insertion line was compromised in auxin transport and auxin-responsive promoter activity. The cipk25 mutant line showed altered expression of auxin efflux carriers (PIN1 and PIN2) and an Aux/IAA family gene SHY2. Decreased PIN1 and PIN2 expression in the cipk25 mutant line was completely restored when combined with a SHY2 loss-of-function mutation, resulting in recovery of root growth. SHY2 and PIN1 expression was partially regulated by cytokinin even in the absence of CIPK25, suggesting a CIPK25-independent cytokinin signaling pathway(s). Our results revealed that CIPK25 plays an important role in the co-ordination of auxin and cytokinin signaling in root meristem development." @default.
- W2891591810 created "2018-09-27" @default.
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- W2891591810 creator A5027121456 @default.
- W2891591810 creator A5041334812 @default.
- W2891591810 creator A5086689139 @default.
- W2891591810 date "2018-09-18" @default.
- W2891591810 modified "2023-09-25" @default.
- W2891591810 title "CBL-interacting protein kinase 25 contributes to root meristem development" @default.
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- W2891591810 doi "https://doi.org/10.1093/jxb/ery334" @default.
- W2891591810 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6305191" @default.
- W2891591810 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30239807" @default.
- W2891591810 hasPublicationYear "2018" @default.
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