| Nutrient changes of transgenic ICE1 rice under low temperature stress |
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| DOI：10.7606/j.issn.1000-7601.2013.06.025 |
| Key Words: low temperature stress ICE1 gene rice nutrient absorption |
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| Abstract: |
| Using two transgenic ICE1 lines (T4-8 and T4-9) and normal cultivar (Kenjian 10) as test materials, the effects of low temperature stress on nutrient absorption of N, P and K in seedlings of rice (Oryza sativa L.) were investigated by pot experiment. The results showed that the MDA content kept at a low level while the SOD activity kept at a high level in transgenic rice seedlings. The contents of N, P and K in the above ground part varied little and kept at a high level. In the under-ground part, they showed a slow downward trend, but the decline rate in transgenic lines was less than that in normal cultivar. At the 10th day after low temper
ature stress, the nitrogen content in under ground part of T4-8 and T4-9 was 13.86% higher, the phosphors content of T4-8 and T4-9 was 42.31% and 50.00% higher respectively, and the potassium content of T4-8 and T4-9 was 85.71% higher, compared with the control. In conclusion, over expression of ICE1 gene in rice could enhance cold tolerance, reduce the injury of rice plants and keep a strong absorption nutrient ability in roots under low temperature stress. |
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