磷转运蛋白OsPT6在水稻武育粳7号苗期磷素吸收利用中的作用

Roles of OsPT6 on the Phosphate Uptake and Utilization in the Rice Seeding of Wuyujing 7

磷转运蛋白OsPT6为水稻Pht1家族成员之一,具有吸收和转运磷酸盐双重功能。以水稻高产品种武育粳7号的OsPT6超表达转基因材料为试材,研究磷转运蛋白OsPT6在武育粳7号磷素吸收利用中的作用。结果表明:1)OsPT6在武育粳7号的地下部表达丰度较高,同时在地下部和地上部该基因均受缺磷诱导表达量显著增加。2)OsPT6超表达后,转基因植株生长良好。正常供磷和低磷处理35d后,OsPT6超表达植株地上部和地下部干物质量都显著增加。3)OsPT6超表达转基因材料在不同浓度磷素处理后,各组织全磷含量有所增加,其中营养器官尤为显著。

As one of members of the Phtl transporters family in rice, the phosphate transporter OsPT6 plays a broad role in Pi uptake, translocation and internal transport throughout the plant. With the OsPT6 over-expressed transgenic rice of Wuyujing 7, a high-yielding variety, we studied the roles of OsPT6 on the phosphate uptake and utilization in rice. The main results are the following： 1）OsPT6 is abundantly expressed in roots of Wuyujing 7. Furthermore, the expression levels of OsPT6 in shoots and roots are induced by phosphate deficiency. 2）The over-expression of OsPT6 can promote the growth of plants. The dry weight of shoots and roots of the OsPT6 over expressed transgenic plants was significantly increased, in both sufficient- and deficient-Pi conditions for 35 days. 3）The total P concentration increases in different tissues and organs of OsPT6 over-expressed transgenic plants, especially in vegetable organs, at different Pi-supply levels.