Overexpression of OsPTR6 in Rice Promotes Rice Growth but Decreases Nitrogen Use Efficiency
September 10, 2014| |
Nitrogen is critical in plant growth and productivity, making PTR/NRT1 transporters vital for rice growth. A study conducted by the team of Xiaorong Fan from Nanjing Agricultural University in China characterized the rice peptide transporter, OsPTR6, and examined its response to high and low nitrate and ammonium availability.
OsPTR6 was overexpressed in transgenic Nipponbare cultivar to increase its nitrogen use efficiency (NUE). Three transgenic lines, OE1, OE5 and OE6, were produced and subjected to hydroponic growth experiments with different nitrogen treatments. The results showed that the plant height and biomass of the transgenic lines increased, and nitrogen accumulation and glutamine synthetase (GS) activities were enhanced. However, nitrogen utilization efficiency (NUE) decreased at high ammonium levels.
These suggest that overexpressing OsPTR6 increases rice growth but decreases nitrogen use efficiency under high ammonium conditions.
To learn more on this study, please visit: http://www.sciencedirect.com/science/article/pii/S0168945214001150.
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