Gene Details:

• Gene ID: Vitvi12g01906
• Gene Symbol: VvK3.1
• Gene Name: potassium channel AKT2/3 isoform X1
• Genome: Vitis vinifera PN40024.v4
• Species: Vitis vinifera

Functional Descriptions:

• Characterization of the grapevine Shaker K+ channel VvK3.1 supports its function in massive potassium fluxes necessary for berry potassium loading and pulvinus-actuated leaf movements.
• Report functional characterization by electrophysiology of a new grapevine Shaker-type K+ channel, VvK3.1. The analysis of VvK3.1 expression patterns was performed by qPCR and in situ hybridization.
• VvK3.1 belongs to the AKT2 channel phylogenetic branch and is a weakly rectifying channel, mediating both inward and outward K+ currents. We showed that VvK3.1 is highly expressed in the phloem and in a unique structure located at the two ends of the petiole, identified as a pulvinus.
• From the onset of fruit ripening, all data support the role of the VvK3.1 channel in the massive K+ fluxes from the phloem cell cytosol to the berry apoplast during berry K+ loading. Moreover, the high amount of VvK3.1 transcripts detected in the pulvinus strongly suggests a role for this Shaker in the swelling and shrinking of motor cells involved in paraheliotropic leaf movements.

Function-related keywords:

• leaf ,  potassium ,  phloem ,  cytosol ,  berry

Literature:

• Characterization of the grapevine Shaker K(+) channel VvK3.1 supports its function in massive potassium fluxes necessary for berry potassium loading and pulvinus-actuated leaf movements.   DOI:  10.1111/nph.15604 ;  PMID:  30735258

Related News:

Gene Resources:

• NCBI ID: 100261806
• UniProt accessions: F6H931

Orthologs:

Sequences: