缺磷条件下蔗糖对水稻磷素吸收利用起重要作用

he mechanism that plant feels, delivers and responses to phosphate deficiency signal is quite complex. Carbohydrates (sugar) are probably the key signal molecules in the processes of plant nutrient absorption and utilization. This work studied on the affections of sucrose to the growth, phosphorus uptake in rice under phosphate deficient conditions. 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 involved in this process. This study provides the basis for the elucidation of the role of sugar in the process of plant response to phosphate deficiency.