磷是植物生长发育必需的大量营养元素之一。油菜作为我国重要的油料作物，具有需磷多且对缺磷敏感的特性。本研究以在甘蓝型油菜根系中表达丰度高且受缺磷诱导的基因BnaPT48为研究对象，通过分析其基因表达模式、蛋白亚细胞定位及遗传材料的表型等，揭示该基因在油菜磷吸收中的作用。研究发现BnaPT48定位于细胞膜，且在根系各组织中受缺磷显著诱导表达。BnaPT48能回补拟南芥磷吸收突变体(atpt1/2)的表型，表明BnaPT48能促进植物的磷吸收。在拟南芥中过表达BnaPT48能促进植株在正常磷和低磷条件下的生长。在油菜中过表达BnaPT48，低磷处理后显著增加地上部干重，降低子叶中的无机磷浓度，促进子叶中叶绿素的降解和子叶衰老，根系无机磷浓度在正常磷时显著增加。本研究揭示了BnaPT48在调控植物磷吸收中的作用，为甘蓝型油菜磷效率的遗传改良提供了理论基础和基因资源。

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