Magnesium (Mg) is an abundant and important cation in cells. Plants rely on Mg transporters to take up Mg from the soil, and then Mg is transported to anthers and other organs. Here, we showed that MGT6+/− plants display reduced fertility, while mgt6 plants are fertile. MGT6 is expressed in the anther at the early stages. Pollen mitosis and intine formation are impaired in aborted pollen grains (PGs) of MGT6+/− plants, which is similar to the defective pollen observed in mgt5 and mgt9 mutants. These results suggest that Mg deficiency leads to pollen abortion in MGT6+/− plants. Our data showed that mgt6 organs including buds develop significantly slower and mgt6 stamens accumulate a higher level of Mg, compared with wild-type (WT) and MGT6+/− plants. These results indicate that slower bud development allows mgt6 to accumulate sufficient amounts of Mg in the pollen, explaining why mgt6 is fertile. Furthermore, we found that mgt6 can restore fertility of mgt5, which has been reported to be male sterile due to defects in Mg transport from the tapetum to microspores and that an additional Mg supply can restore its fertility. Interestingly, mgt5 fertility is recovered when grown under short photoperiod conditions, which is a well-known factor regulating plant fertility. Taken together, these results demonstrate that slow development is a general mechanism to restore mgts fertility, which allows other redundant magnesium transporter (MGT) members to transport sufficient Mg for pollen formation.

镁（Mg）是细胞中丰富而重要的阳离子。植物依靠镁运输者从土壤中吸收镁，然后将其运输到花药和其他器官。在这里，我们表明MGT6 +/- 植物的肥力降低，而 mgt6 植物肥沃。 MGT6在早期以花药表达。流产的花粉粒（PG）中的花粉有丝分裂和肌无力形成受损。MGT6 +/- 植物，类似于花粉中观察到的有缺陷的花粉 mgt5 和 mgt9突变体。这些结果表明，镁缺乏导致花粉流产。MGT6 +/-植物。我们的数据表明mgt6 包括芽在内的器官发育明显变慢， mgt6 与野生型（WT）和雄蕊相比，雄蕊积累的Mg含量更高。 MGT6 +/-植物。这些结果表明，较慢的芽发育允许mgt6 在花粉中积累足够量的Mg，解释了为什么 mgt6肥沃的。此外，我们发现mgt6 可以恢复 mgt5据报道，由于镁从绒毡层转移到小孢子中的缺陷，该菌是雄性不育的，另外补充镁可以恢复其繁殖力。有趣的是mgt5在较短的光周期条件下生长时，可恢复肥力，这是调节植物肥力的众所周知的因素。综上所述，这些结果表明，缓慢的发育是恢复的一般机制。t肥力，这使得其他多余的镁转运蛋白（MGT）成员可以转运足够的Mg以形成花粉。