| At different phosphorus levels, pot experiments, in different irrigations (normal water supply, medium drought stress, drought stress), were carried out to determine the varieties of root hydraulic conductance (Lpr) of barley in a pressure chamber. The result showed that under different water conditions, the Lpr of non-phosphorus treatment was always strongly lower than that of P-treatment seedlings, and even under the condition of normal water supply the former was only 19% of the latter. It indicated that P could regulate the amount of AQP. Lpr of non-phosphorus treatment decreased more sharply with the intensifying of drought, and the recovering ability was significantly weaker than that of P-treatment seedlings during the course of irrigation, and it indicated that phosphorus played a very important role in improving the adaptability to drought and recovering ability of barley. |