Figure 5.

Mg redistribution and mobility in ossgr mutants under −Mg stress. A, Scheme for Mg redistribution. Rice seedlings of both wild-type (WT) and mutant plants were first grown in nutrient solution containing 250-μm Mg until the L6 leaves were fully expanded. Then plants were transferred to −Mg nutrient solution for 8 d. Plant parts (roots, basal node, and the six labeled leaves) were separately harvested before and after exposure to the −Mg treatment. B, Mg distribution ratio before transfer to −Mg media. C, Mg redistribution ratio after 8 d in −Mg nutrient solution. Ratios were calculated by dividing Mg content in each fraction by total plant Mg content. D, Mg mobility. The mobility of Mg was calculated by dividing the decrease of Mg content in each fraction after 8 d in −Mg media by total plant Mg contents. Data are means ± sd (n = 3). The asterisk shows a significant difference compared to wild type (P < 0.05 by Tukey’s test).