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Mechanosensitive ion channels are pore-forming transmembrane proteins that allow ions to move down their electrochemical gradient in response to mechanical stimuli. They participate in many plant developmental processes including the maintenance of plastid shape, pollen tube growth, etc. Herein, a total of 11, 10, 6, 30, 9, and 8  MSL  genes were identified in  Aegilops tauschii  ,   Hordeum vulgare, Sorghum bicolor, Triticum aestivum  ,   Triticum urartu,  and  Zea mays,  respectively .  These genes were located on various chromosomes of their respective cereal, while  MSL s of  T. urartu  were found on scaffolds. The phylogenetic analysis, subcellular localization, and sequence homology suggested clustering of MSLs into two classes. These genes consisted of  cis -regulatory elements related to growth and development, responsive to light, hormone, and stress. Differential expression of various  MSL  genes in tissue developmental stages and stress conditions revealed their precise role in development and stress responses. Altered expression during CaCl 2  stress suggested their role in Ca 2+  homeostasis and signaling. The co-expression analysis suggested their interactions with other genes involved in growth, defense responses etc. A comparative expression profiling of paralogous genes revealed either retention of function or pseudo-functionalization. The present study unfolded various characteristics of MSLs in cereals, which will facilitate their in-depth functional characterization in future studies.

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Genome-wide characterization and expression analysis suggested diverse functions of the mechanosensitive channel of small conductance-like (MSL) genes in cereal crops