Abstract
Magnesium (Mg) is an important micronutrient for various physiological processes in plants. In this study, putative Magnesium Transporter (MGT) genes have been identified in Solanum lycopersicum, Solanum tuberosum, Brachypodium distachyon, Fagaria vesca, Brassica juncea and were classified into 5 distinct groups based on their sequence homology. MGT genes are very diverse and possess very low sequence identity within its family. However, the Gly-Met-Asn (GMN) signature motif is present in most of the genes which are believed to be essential for Mg2+ recognition. In S. lycopersicum, different physiological root growth pattern was observed in both Mg excess and deficient conditions. Quantitative RT-PCR gene expression study shows that most of the SlMGT genes were upregulated in response to Mg deficient condition.
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