Calcium Signaling in Plants 🌱
Calcium signaling is one of the most important communication systems in plants, helping them sense and respond to environmental and developmental cues. Calcium ions (Ca²⁺) act as secondary messengers inside plant cells, transmitting signals triggered by stimuli such as light, drought, salinity, pathogens, and mechanical stress. When plants perceive these signals, temporary changes in intracellular calcium concentration occur, initiating a cascade of biochemical responses that regulate gene expression and cellular activities. The universality of calcium signaling lies in its presence across almost all plant species and many biological systems. Basic mechanisms such as calcium influx through channels, calcium-binding proteins, and signal decoding pathways are widely conserved. Proteins like calmodulin, calcium-dependent protein kinases (CDPKs), and calcineurin B-like proteins play central roles in interpreting calcium signals and translating them into specific physiological respons...