Function of Arabidopsis CPL1 in cadmium responses

Date

2014-10-01

Author

Aksoy, Emre
KOIWA, HISASHI

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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.

URI

http://www.tandfonline.com/doi/abs/10.4161/psb.24120
https://hdl.handle.net/11511/92939

Journal

Plant Signaling & Behavior

DOI

https://doi.org/10.4161/psb.24120

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Department of Biology, Article

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Citation Formats

E. Aksoy and H. KOIWA, “Function of Arabidopsis CPL1 in cadmium responses,” Plant Signaling & Behavior, vol. 8, no. 5, pp. 24120–24120, 2014, Accessed: 00, 2021. [Online]. Available: http://www.tandfonline.com/doi/abs/10.4161/psb.24120.