The Roles of Calcineurin B-like Proteins in Plants under Salt Stress

Abstract

Salinity stands as a significant environmental stressor, severely impacting crop productivity. Plants exposed to salt stress undergo physiological alterations that influence their growth and development. Meanwhile, plants have also evolved mechanisms to endure the detrimental effects of salinity-induced salt stress. Within plants, Calcineurin B-like (CBL) proteins act as vital Ca2+ sensors, binding to Ca2+ and subsequently transmitting signals to downstream response pathways. CBLs engage with CBL-interacting protein kinases (CIPKs), forming complexes that regulate a multitude of plant growth and developmental processes, notably ion homeostasis in response to salinity conditions. This review introduces the repercussions of salt stress, including osmotic stress, diminished photosynthesis, and oxidative damage. It also explores how CBLs modulate the response to salt stress in plants, outlining the functions of the CBL-CIPK modules involved. Comprehending the mechanisms through which CBL proteins mediate salt tolerance can accelerate the development of cultivars resistant to salinity.

Effects of Exogenous Isosteviol on the Physiological Characteristics of Brassica napus Seedlings under Salt Stress

“…Salt stress is a common abiotic stress to crops and has become a serious environmental problem that affects plant growth and development. Recently, many studies have shown that plant seed germination is not significantly affected by low concentrations of salt stress, while higher concentrations of salt stress inhibit plant seed germination and the growth and development of seedlings [ 19 , 20 ]. Ren et al (2020) found that 100 mM NaCl stress significantly inhibited the development of pak choi ( Brassica chinensis L.) seed germination vigor, germination index, vigor index, and growth of the radicle and embryo [ 21 ].…”