The Potassium Transporter AtHAK5 Functions in K+ Deprivation-Induced High-Affinity K+ Uptake and AKT1 K+ Channel Contribution to K+ Uptake Kinetics in Arabidopsis Roots1[w]

From: Plant Physiology | Date: March 1, 2005| Author: | Copyright information

Potassium is an important macronutrient and the most abundant cation in plants. Because soil mineral conditions can vary, plants must be able to adjust to different nutrient availabilities. Here, we used Affymetrix Genechip microarrays to identify genes responsive to potassium (K+) deprivation in roots of mature Arabidopsis (Arabidopsis thaliana) plants. Unexpectedly, only a few genes were changed in their expression level after 6, 48, and 96 h of K+ starvation even though root K content was reduced by approximately 60%. AtHAK5, a potassium transporter gene from the KUP/HAK/KT family, was ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Proton-Transfer-Reaction Mass Spectrometry as a New Tool for Real Time Analysis of Root-Secreted Volatile Organic Compounds in Arabidopsis1
; ...biotic stresses. The VOC formation of Arabidopsis roots was analyzed using proton-transfer-reacti...between microbes and insects and Arabidopsis roots. Compatible interactions of Pseudomonas...syringae DC3000 and Diuraphis noxia with Arabidopsis roots resulted in the rapid release ...
Quantitative trait loci for component physiological traits determining salt tolerance in rice
; ...into rice while maintaining potassium uptake are characteristics that would...independently govern sodium uptake, potassium uptake, and sodium:potassium selectivity. The QTL for sodium and potassium uptake are on different linkage groups...
IRT1, and Arabidopsis transporter essential for iron uptake from the soil and for plant growth
; ...often limits plant growth. In response to iron deficiency, Arabidopsis roots induce the expression of the divalent cation transporter...likely to be components of the iron-deficiency response of Arabidopsis roots and represent good c
Sodium uptake in Arabidopsis roots is regulated by cyclic nucleotides
; Sodium Uptake in Arabidopsis Roots Is Regulated by Cyclic Nucleotides1 Sodium uptake from the...have characterized voltage independent channels (VICs) in Arabidopsis roots that are thought to contribute to Na+ entry. VICs showed...
In the early response of Arabidopsis roots to ethylene, cell elongation is up- and down-regulated and uncoupled from differentiation
; In the Early Response of Arabidopsis Roots to Ethylene, Cell Elongation Is Up- and Down-Regulated...elongation of individual cells in intact growing roots. In Arabidopsis roots, mature cell length normally was used to analyze the effect...
Symplasmic Transport into Nematode Syncytia
; ...Beta vulgaris as well as many members of the Brassicaceae, including Arabidopsis (Arabidopsis thaliana). Inoculation of Arabidopsis roots with newly hatched beet cyst nematodes leads to the formation of a syncytium within the root vascular cylinder that serves...
Enhancement of plant-microbe interactions using a rhizosphere metabolomics-driven approach and its application in the removal of polychlorinated biphenyls1[w]
; ...constitute 84% of the secondary metabolites exuded from Arabidopsis roots. Phenylpropanoid-utilizing microbes are more competitive...strain (designated Pp-wt) that can efficiently colonize Arabidopsis roots, use phenylpropanoids, and independently degrade a major...
Mannose induces an endonuclease responsible for DNA laddering in plant cells
; ...Man) on plant cells was studied in two different systems: Arabidopsis roots and maize (Zea mays) suspension-cultured cells. In both...system for studying apoptosis that is suitable for both Arabidopsis roots and a maize (Zea mays) cell culture. This system is based...
Biocontrol of Bacillus subtilis against Infection of Arabidopsis Roots by Pseudomonas syringae Is Facilitated by Biofilm Formation and Surfactin Production1
; ...infection model demonstrating that the bacterial pathogen Pseudomonas syringae pv tomato DC3000 is capable of infecting Arabidopsis roots both in vitro and in soil. Using this infection model, we demonstrated the biocontrol ability of a wild-type B. subtilis...
Extracellular ATP inhibits root gravitropism at concentrations that inhibit polar auxim transport
; ...similar to those found inside cells can block gravitropism of Arabidopsis roots. When plants are grown in Murashige and Skoog medium supplied...in a dose-dependent fashion in both maize (Zea mays) and Arabidopsis roots and increases the retention of [^sup 3^H]indole-3-acetic...