GENOME-WIDE ANALYSIS OF CYCLIC NUCLEOTIDE-GATED ION CHANNELS (CNGCS) OF ARABIDOPSIS THALIANA UNDER ABIOTIC STRESSES

Abstract

Cyclic nucleotide-gated ion channels (CNGCs) in plants play a significant role in abiotic and biotic stress tolerance. This study analyzed 20 CNGCs of Arabidopsis thaliana for their potential role under different stresses. According to phylogenetic analysis, the abiotic stress-tolerating gene CNGC19 in A. thaliana showed as closely related to Hordeum vulgare cyclic nucleotide-gated ion channel 19 (HvCNGC19) in barley and Oryza sativa cyclic nucleotide-gated ion channels 4 and 11 (OsCNGC4 and OsCNGC11) of rice. All CNGCs of A. thaliana contains an ion transport domain. HvCNGC19, OsCNGC4, OsCNGC11, and AtCNGC19 contained the same motif 24, which depicted that they might be expressed similarly to AtCNGC19 under salt stress. CNGCs expression signals under abiotic stress showed high expression of AtCNGC19 and AtCNGC20 under salt stress in roots and AtCNGC2 and AtCNGC4 in shoots, yet very low in roots under approximately all stresses. The findings provide widespread implications for future cell signaling research and characterization of CNGCs for their roles under different stresses.