| 低温胁迫对核桃抗寒性指标的影响 |
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| 引用本文： | 贺奇.低温胁迫对核桃抗寒性指标的影响[J].山西林业科技,2014(1):31-33. |
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| 作者姓名： | 贺奇 |
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| 作者单位： | 山西省林业科学研究院,山西太原030012 |
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| 基金项目： | 林业公益性行业专项（201004048-5） |
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| 摘 要： | 笔者以晋RS-1系核桃砧木、中林1号、鲁光、晋香1年生枝条为试材,设置0℃,-10℃,-20℃,-30℃,-40℃5个温度梯度处理,分析低温胁迫对4个不同品种(系)核桃超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量及游离脯氨酸含量的影响。结果表明:在低温胁迫下,随着温度的降低,参试核桃品种SOD活性总体呈现先升后降的趋势,晋香和鲁光的SOD活性呈现出"升—降—升—降"的双峰曲线,晋RS-1系和中林1号呈现出"升—降"的单峰曲线趋势,各品种间差异显著(P0.05);各品种MDA含量随温度降低总体呈上升趋势,其中,晋RS-1系呈现出"降—升"的双峰曲线趋势,鲁光及中林1号呈现出"升—降"的曲线趋势,各品种间差异显著(P0.05);各品种游离脯氨酸含量总体呈增长趋势,但不同品种间脯氨酸含量变化规律不同,且差异显著。
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| 关 键 词： | 核桃 SOD活性 MDA 游离脯氨酸 抗寒性 |
Influence of Low Temperature Stress on Cold Resistance Indices of Walnut |
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| He Qi.Influence of Low Temperature Stress on Cold Resistance Indices of Walnut[J].Shanxi Forestry Science and Technology,2014(1):31-33. |
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| Authors: | He Qi |
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| Institution: | He Qi (Shanxi Academy of Forestry Sciences, Taiyuan 030012, China) |
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| Abstract: | The experiment was taken with 1 a branches of Jin RS-1, Zhonglin 1, Luguang, Jinxiang and treated at 5 tem- perature treatments as 0 ℃, - 10 ℃, - 20 ℃, - 30 ℃ and - 40 ℃, analyzed the effects of SOD activity, MDA content and free proline content under the low temperature stress. The result showed that： as the temperature decreased, SOD activity of four materials increased to a certain level and declined finally, SOD activity of Jinxiang and Luguang showed two peaks with ＇ high-low-high-low＇ trend, SOD activity of Jin RS-1, Zhonglinl showed ＇ high-low＇ trend, there were signifi- cant differences among 4 strains SOD activity（ P 〈 0. 05 ） ; MDA contents of 4 strains increased with decrease of tempera- ture, Jin RS-1 and Luguang showed ＇ low-high＇ trend, Luguang and Zhonglin 1 showed ＇ high-low＇ trend, and there were significant differences among 4 strains MDA content（ P 〈0. 05 ） ; free proline content of 4 strains was totally increased with decrease of temperature, but changing regularity of 4 strains free proline was different and the free proline contents under the same temperature were significant differences. |
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| Keywords: | Walnut SOD activity MDA Free proline Cold resistance |
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