We investigated the change of growth characters by over-expressing OsPT6 (OsPT6-OX) under phosphorus (Pi) deficient condition in rice. In analyzing the change of growth rate according to Pitreatment for two weeks, shoot growth rate of OsPT6-OX was increased in Pi deficient condition than in Pi sufficient condition. Therefore, the chlorophyll content of leaf in OsPT6-OXs did not increase even decreased in the youngest leaf. However growth rate of wild type plant in Pi deficient condition showed significant reduction with increment of chlorophyll content. In analyzing agronomic characters, the tiller number of OsPT6-OX less decreased than those of wild type plant in Pi deficient condition. Panicle number and ripening rate of wild type plant were changed according to Pi treatment. However those of OsPT6-OX did not change in such conditions. Resulting of changes in agronomic characters, yield of wild type plant decreased about 10 % in Pi deficient condition. That of OsPT6-OX did not show significant difference in Pi deficient condition. The results obtained this study demonstrated that over-expression of OsPT6 could increase phosphorus deficient stress resistance in rice.

• Woon-Ha Hwang(National Institute of Crop Science (NICS), RDA)
• Soo-Kwon Park(National Institute of Crop Science (NICS), RDA)
• Dongjin Shin(National Institute of Crop Science (NICS), RDA)
• Min-Hee Nam(National Institute of Crop Science (NICS), RDA)
• Do-Hoon Kim(Department of Genetic Engineering, Dong-A University)
• In-Jung Lee(School of Applied Bioscienes, Kyung pook national university)
• Dong-Soo Park(National Institute of Crop Science (NICS), RDA) Corresponding author