Acknowledgments We are grateful to Dr Michael E Maguire (Case Western Reserve University, USA) for providing the Salmonella mutant strain MM281 and advice on tracer uptake. This work was supported by grants from National Natural Science Foundation of China (30370794), Hunan Young Scientist Program (03JJY1003), and Hunan Provincial NSFC (08JJ3088).
Magnesium (Mg^2+) is abundant in plant cells and plays a critical role in many physiological processes. A 10-member gene family AtMGT (also known as AtMRS2) was identified in Arabidopsis, which belongs to a eukar...