Cesium Inhibits Plant Growth through Jasmonate Signaling in Arabidopsis thaliana

International Journal of Molecular Sciences

Eri Adams¹  Parisa Abdollahi¹ 

[1] RIKEN Plant Science Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan;

关键词: cesium;    potassium;    Arabidopsis thaliana;    jasmonate;    HAK5;   

DOI  :  10.3390/ijms14034545

来源: mdpi

【 摘 要 】

It has been suggested that cesium is absorbed from the soil through potassium uptake machineries in plants; however, not much is known about perception mechanism and downstream response. Here, we report that the jasmonate pathway is required in plant response to cesium. Jasmonate biosynthesis mutant aos and jasmonate-insensitive mutant coi1-16 show clear resistance to root growth inhibition caused by cesium. However, the potassium and cesium contents in these mutants are comparable to wild-type plants, indicating that jasmonate biosynthesis and signaling are not involved in cesium uptake, but involved in cesium perception. Cesium induces expression of a high-affinity potassium transporter gene HAK5 and reduces potassium content in the plant body, suggesting a competitive nature of potassium and cesium uptake in plants. It has also been found that cesium-induced HAK5 expression is antagonized by exogenous application of methyl-jasmonate. Taken together, it has been indicated that cesium inhibits plant growth via induction of the jasmonate pathway and likely modifies potassium uptake machineries.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.