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| Phosphorus Fractions in Rhizospheric Soil of High-Phosphorus Efficiency Transgenic Rice During Its Growth Period |
| Received:April 08, 2015 |
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| KeyWord:rice(Oryza sativa L.);transgene;available phosphorus;phosphorus fraction;alkaline phosphatase |
| Author Name | Affiliation | E-mail | | CAO Xuan | Agro-Environmental Protection Institute, Ministry of Agriculture
Key Laboratory of Original Agro-environment Quality of Ministry of Ag-riculture and Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China
Department of Agronamy, Tianjin Agricultural University, Tianjin 300384, China | | | ZANG Huai-min | Agro-Environmental Protection Institute, Ministry of Agriculture
Key Laboratory of Original Agro-environment Quality of Ministry of Ag-riculture and Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China | | | ZHAO Yun-li | College of Life Sciences, Tianjin Normal University, Tianjin 300387, China | | | XIU Wei-ming | Agro-Environmental Protection Institute, Ministry of Agriculture
Key Laboratory of Original Agro-environment Quality of Ministry of Ag-riculture and Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China | | | LI Gang | Agro-Environmental Protection Institute, Ministry of Agriculture
Key Laboratory of Original Agro-environment Quality of Ministry of Ag-riculture and Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China | | | YANG Dian-lin | Agro-Environmental Protection Institute, Ministry of Agriculture
Key Laboratory of Original Agro-environment Quality of Ministry of Ag-riculture and Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China | | | LIU Hui-fen | Department of Agronamy, Tianjin Agricultural University, Tianjin 300384, China | | | ZHAO jian-ning | Agro-Environmental Protection Institute, Ministry of Agriculture
Key Laboratory of Original Agro-environment Quality of Ministry of Ag-riculture and Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Tianjin 300191, China | zhaojianning@caas.cn |
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| Abstract: |
| High-phosphorus(P) efficiency rice has great potential to take up phosphorus from soil, which may influence the status of soil phosphorus fractions. We designed an experiment to identify the characteristics of phosphorus fractions in rhizospheric soil of a high-P efficiency transgenic rice during its growth period using japonica rice cultivar Nipponbare(CK) and its high-P efficiency transgenic rice(OsPT4) and high-P efficiency mutant(PHO2) as model plants. Alkaline phosphatase activity in rhizospheric soil was also examined. Significant higher root dry weight, biomass and P accumulation were observed in OsPT4 and PHO2 than in CK. PHO2 also had higher phosphorus use efficiency than Nipponbare did. Compared with the control, available phosphorus concentrations in rhizospheric soil of OsPT4 was significantly higher at tillering stage, whereas it was significantly lower at heading stage. Phosphorus fractions in OsPT4 and PHO2 rhizospheric soils had no significant difference from those of Nipponbare during their growth period. Inorganic P fractions were in order:Ca10-P >O-P >Ca8-P >Fe-P >Al-P >Ca2-P. Of organic P fractions, moderate labile organic phosphorus was dominant, followed by resistant organic phosphorus and moderate-resistant organic phosphorus, while labile organic phosphorus was the lowest. No significant difference was observed in the activity of soil alkaline phosphatase between OsPT4 and PHO2 and Nipponbare during their growth period. High-P efficiency rice OsPT4 and PHO2 had no significant effects on phosphorus fractions and alkaline phosphatase activity in rhizospheric soil in the first year. |
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