AHK5 Histidine Kinase Regulates Root Elongation Through an ETR1-Dependent Abscisic Acid and Ethylene Signaling Pathway in Arabidopsis thaliana
Open Access
- 22 December 2006
- journal article
- Published by Oxford University Press (OUP) in Plant and Cell Physiology
- Vol. 48 (2) , 375-380
- https://doi.org/10.1093/pcp/pcl065
Abstract
The Arabidopsis thaliana genome encodes a small family of histidine (His) protein kinases, some of which have redundant functions as ethylene receptors, whereas others serve as cytokinin receptors. The most poorly characterized of these is authentic histidine kinase 5 (AHK5; also known as cytokinin-independent 2, CKI2). Here we characterize three independent ahk5 mutants, and show that they have a common phenotype. Our results suggest that AHK5 His-kinase acts as a negative regulator in the signaling pathway in which ethylene and ABA inhibit the root elongation through ETR1 (an ethylene receptor).Keywords
This publication has 24 references indexed in Scilit:
- Identification and characterization of cytokinin-signalling gene families in riceGene, 2006
- Modulation of reactive oxygen species activities and H2O2 accumulation during compatible and incompatible tomato–root‐knot nematode interactionsNew Phytologist, 2006
- Genome-Wide Insertional Mutagenesis of Arabidopsis thalianaScience, 2003
- The putative sensor histidine kinase CKI1 is involved in female gametophyte development in ArabidopsisMolecular Genetics and Genomics, 2003
- Abscisic Acid Signaling in Seeds and SeedlingsPlant Cell, 2002
- Ethylene hormone receptor action in ArabidopsisBioEssays, 2001
- Regulation of Abscisic Acid Signaling by the Ethylene Response Pathway in ArabidopsisPlant Cell, 2000
- Interactions between Abscisic Acid and Ethylene Signaling CascadesPlant Cell, 2000
- Arabidopsis Ethylene-Response Gene ETR1 : Similarity of Product to Two-Component RegulatorsScience, 1993
- Exploiting the triple response of Arabidopsis to identify ethylene-related mutants.Plant Cell, 1990