| 低温胁迫下镧对水稻种子萌发的影响 |
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| 引用本文： | 刘惠娜,钟东方,许良政.低温胁迫下镧对水稻种子萌发的影响[J].嘉应学院学报,2007,25(3):72-76. |
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| 作者姓名： | 刘惠娜 钟东方 许良政 |
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| 作者单位： | 嘉应学院,生物系,广东,梅州,514015 |
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| 摘 要： | 以水稻(Oryza sativa)种子为实验材料,研究了不同浓度稀土元素镧浸种对水稻种子低温萌发的影响。结果表明:15℃低温胁迫抑制水稻种子的萌发,浸种期用硝酸镧处理能够提高种子的抗逆性。低浓度((50~250)×10-6mol/L)硝酸镧浸种能提高水稻种子发芽率、发芽势、呼吸速率和过氧化氢酶活性,提高种子抗寒能力,实验发现用硝酸镧处理种子萌发以250×10-6mol/L浓度为最佳,低温胁迫下,发芽率提高9.67%,呼吸速率提高56.25%,过氧化氢酶活性提高1.73%。350×10-6mol/L以上高浓度对水稻种子的萌发无明显影响。
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| 关 键 词： | 低温胁迫 镧 发芽率 呼吸速率 过氧化氢酶 |
| 文章编号： | 1006-642X（2007）03-0072-05 |
| 修稿时间： | 2007-02-03 |
Effects of Lanthanum Nitrate on Seed Germination of Rice Under Low Temperature Stress |
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| LIU Hui-na,ZHONG Dong-fang,XU Liang-zheng.Effects of Lanthanum Nitrate on Seed Germination of Rice Under Low Temperature Stress[J].Journal of Jiaying University,2007,25(3):72-76. |
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| Authors: | LIU Hui-na ZHONG Dong-fang XU Liang-zheng |
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| Institution: | Department of biology, Jiaying University, Meizhou 514015, China |
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| Abstract: | The Oryza sativa is used as the experiment material to study the effect of the rare-earth element lanthanum on the germination under low temperature stress.The results indicate that lanthanum nitrate(La(NO3)3) soaking treatment increased seed′s resistance to low temperature(15 ℃).(50~250)×10-6 mol·L-1 La(NO3)3 enhanced seed germination percentage,germination vigor,the respiration rate,and catalase activeness.When the La(NO3)3 concentration is higher than 350×10-6 mol·L-1 La(NO3)3,seed germination is not obviously affected.The optimum concentration of lanthanum treatment is 250×10-6 mol·L-1 La(NO3)3 in this experiment.Under low temperature stress,lanthanum increases germination percentage by 9.67 %,respiration rate and catalase activity by 56.25 % and 1.73 %. |
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| Keywords: | low temperature stress lanthanum conductivity rate respiration rate catalase activity |
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