Function of Arabidopsis CPL1 in cadmium responses.

abstract

• Transcriptional and post-transcriptional responses to external iron (Fe) availability are essential for the cellular Fe homeostasis. Fe deficiency strongly induces Fe utilization-related gene expression; however, little is known about the early Fe signaling that regulates expression of a central transcription factor FIT. In Arabidopsis, mutations in RNA polymerase II CTD-phosphatase-like 1 (CPL1) enhance the expression of Fe utilization-related genes including FIT under Fe deficiency. Fe content is significantly increased in the roots and decreased in the shoots of cpl1-2 plants, and root growth of the cpl1-2 mutant shows higher tolerance to Fe deficiency and to toxicity of cadmium (Cd). The cpl1-2 plants accumulate more Cd in the shoots, suggesting that Cd toxicity in the cpl1-2 roots is circumvented by the transport of excess Cd to the shoots. Here we show data suggesting that the root-to-shoot translocation of Cd in cpl1-2 is mediated by yet uncharacterized Cd transport mechanisms.

authors

• Koiwa, Hisashi

published proceedings

• Plant Signal Behav

altmetric score

• 0.25

author list (cited authors)

• Aksoy, E., & Koiwa, H.

citation count

• 3

complete list of authors

• Aksoy, Emre||Koiwa, Hisashi

publication date

• January 2013

publisher

• Taylor & Francis  Publisher

published in

• Plant Signaling and Behavior  Journal

keywords

• Arabidopsis
• Arabidopsis Proteins
• Cadmium
• Cpl1
• Ctd
• Fit
• Fro2
• Gene Expression Regulation, Plant
• Iron
• Irt1
• Membrane Transport Proteins
• Phosphoprotein Phosphatases
• RNA-Binding Proteins
• Reverse Transcriptase Polymerase Chain Reaction
• Signaling
• Stress
• Transcription
• Transcription Factors

Digital Object Identifier (DOI)

• 10.4161/psb.24120

start page

• e24120

end page

• e24120

volume

• 8

issue

• 5

URL

• http%3A%2F%2Fdx.doi.org%2F10.4161%2Fpsb.24120