Keywords

Plants, Extracellular Calmodulin, Peptide Messenger

Abstract

Calmodulin has always been considered a multifunctional receptor protein for intracellular calcium signaling. More than 10 years of research at home and abroad have confirmed that it is commonly found outside human and animal cells and in plant apoplasts. Our work has proven that calmodulin It not only commonly exists outside plant cells, but also has many important biological functions at extracellular sites such as promoting the proliferation of suspension culture cells and their protoplasts, regulating pollen germination and elongation, and promoting the light-independent expression of rbc small subunit genes. In the pollen system, it has also been proven that extracellular calmodulin has a transmembrane and extracellular signal transduction mechanism, including heterotrimeric G protein, PLC/IP3/IP3R and intracellular calcium signaling. Participation. Therefore, it is believed that extracellular calmodulin may be a polypeptide messenger in plants, which is traditionally considered to be absent in plants for intercellular communication.

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Original research done by Sun Daye, Ma Ligeng

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