缺磷条件下蔗糖对水稻磷素吸收利用起重要作用

Sucrose Plays an Important Role in the Uptake and Use of Phosphate in Rice under P-deficiency Conditions

研究了水稻缺磷条件下蔗糖对其生长、磷素吸收利用的影响。结果表明,外加蔗糖可以提高水稻缺磷条件下的生物量,可以促进水稻缺磷条件下的磷素吸收;利用磷转运蛋白基因OsPT2启动子+GUS报告基因转基因水稻材料,进一步探讨了蔗糖在水稻缺磷条件下促进磷素吸收利用的分子机理。结果表明,水稻磷转运蛋白OsPT2参与了蔗糖促进缺磷水稻的磷素吸收与转运。

The effects of sucrose on the growth,phosphorus uptake in rice under phosphate deficient conditions were studied.The results showed that exogenous sucrose can increase the biomass of rice,promote the absorption of phosphorus in rice under phosphate deficiency.Using phosphate transporter gene OsPT2 promoter ＋GUS reporter gene transgenic rice,we further explored the molecular mechanism that the uptake and use of phosphate was promoted in rice by sucrose under phosphate deficiency.The results showed that rice phosphate transporter OsPT2 was involved in this process.