The Arabidopsis Ca-Dependent Protein Kinase CPK12 Is Involved in Plant Response to Salt Stress.

CDPKs (Ca-Dependent Protein Kinases) are very important regulators in plant response to abiotic stress. The molecular regulatory mechanism of CDPKs involved in salt stress tolerance remains unclear, although some CDPKs have been identified in salt-stress signaling. Here, we investigated the function of an CDPK, CPK12, in salt-stress signaling.

-Facilitated Cd Influx through Plasma Membrane Ca-Permeable Channels Is Stimulated by HO and H-ATPase in Ectomycorrhizal × under Cadmium Stress.

Using a Non-invasive Micro-test Technique, flux profiles of Cd, Ca, and H were investigated in axenically grown cultures of two strains of (MAJ and NAU), ectomycorrhizae formed by these fungi with the woody Cd-hyperaccumulator, × , and non-mycorrhizal (NM) roots. The influx of Cd increased in fungal mycelia, NM and ectomycorrhizal (EM) roots upon a 40-min shock, after short-term (ST, 24 h), or long-term (LT, 7 days) exposure to a hydroponic environment of 50 μM CdCl. Cd treatments (shock, ST, and LT) decreased Ca influx in NM and EM roots but led to an enhanced influx of Ca in axenically grown EM cultures of the two isolates.