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Plant Cell Physiol. 2012 Jun;53(6):1117-23. doi: 10.1093/pcp/pcs056. Epub 2012 Apr 17.

HAK transporters from Physcomitrella patens and Yarrowia lipolytica mediate sodium uptake.

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Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid, Campus de Montegancedo, Carretera M-40, km 37.7, 28223-Pozuelo de Alarcón (Madrid), Spain.


The widespread presence of Na(+)-specific uptake systems across plants and fungi is a controversial topic. In this study, we identify two HAK genes, one in the moss Physcomitrella patens and the other in the yeast Yarrowia lipolytica, that encode Na(+)-specific transporters. Because HAK genes are numerous in plants and are duplicated in many fungi, our findings suggest that some HAK genes encode Na(+) transporters and that Na(+) might play physiological roles in plants and fungi more extensively than is currently thought.

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