Work

Protein Kinase Cascade Involved in Rapid ABA-signaling in Guard Cells of Vicia faba

Year: 2005

Type: article

Abstract: Protein kinases are involved in signal transduction for environmental stress responses. In response to drought and salinity, a 48-kDa protein kinase (AAPK; abscisic acid-activated protein kinase (AAPK) in guard cells is activated by abscisic acid (ABA) and phosphorylates several targets such as the carboxy-terminus of inward-rectifying K+ channel and heterogeneous mRNA binding protein to adopt to the changing environment. The AAPK expressed specifically in guard cells, and recombinant AAPK was phosphorylated only with the extract from ABA-treated guard cells but not from untreated cells. This indicates the presence of an AAPK kinase (AAPKK), which is activated by ABA and phosphorylates AAPK preceding the activation of AAPK. Both AAPK and AAPKK are involved in the protein kinase cascade for the rapid ABA-signaling.

Source: Zeitschrift für Naturforschung C

DOI: 10.1515/znc-2005-9-1017

Authors: Takuya Furuichi, Izumi C. Mori, Shoshi Muto

Institutions: Nagoya University, Okayama University

Language: English

Topic: Plant Stress Responses and Tolerance

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: hybrid

Estimated APC paid: $2,712

Funder: Japan Society for the Promotion of Science