(A) SYSTEMATIC VIEW OF RICE CBL-INTERACTING PROTEIN KINASE FAMILY
Hoi Khoanh Giong
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Calcium, as a universal second messenger, plays an important role in various networks of signal transduction pathways in plant. There are several components of Ca2+ mediating signaling pathways including calcium-dependent protein kinases (CDPKs), calmodulins (CaM) and calcineurin B-like proteins (CBLs), and CBL-interacting Protein Kinases (CIPK). Here, we provided a systematic view of 33 members in rice CIPK family which are further classified into 6 subgroups. The integrating of various meta-expression data such as anatomy, abiotic stress, and diurnal regulation to phylogenomic tree context of CIPK family reveals that 17 out of all family members showed preferred expression in leaf during vegetative growth. Among them, 19 genes showed peak expression at the day, while no gene showed peak expression at the dark. Regarding abiotic stress, 15 genes were induced by drought stress in leaf organs, and of them, 13 genes showed up-regulation and 2 genes were down-regulated. We then developed functional gene network associated with these 15 genes. This network might provide useful hypothetical model to understand molecular mechanism of drought response and circadian regulation associated with rice CIPK family genes.