| 模拟酸雨对黄瓜种子萌发及幼苗生理特性的影响 |
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| 引用本文： | 王辉,齐泽民,肖小君,黄作喜.模拟酸雨对黄瓜种子萌发及幼苗生理特性的影响[J].安徽农业科学,2011,39(22):13422-13424. |
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| 作者姓名： | 王辉 齐泽民 肖小君 黄作喜 |
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| 作者单位： | 内江师范学院生命科学学院,四川内江641112;四川省高等学校特色农业资源研究与利用重点实验室,四川内江641112;内江师范学院生命科学学院,四川内江641112;四川省高等学校特色农业资源研究与利用重点实验室,四川内江641112;内江师范学院生命科学学院,四川内江641112;四川省高等学校特色农业资源研究与利用重点实验室,四川内江641112;内江师范学院生命科学学院,四川内江641112;四川省高等学校特色农业资源研究与利用重点实验室,四川内江641112 |
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| 基金项目： | 四川省教育厅科研项目(10ZA014) |
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| 摘 要： | 目的]衡量黄瓜对酸雨的耐受能力,同时也为正确评估酸雨给黄瓜规模化生产造成的损失提供参考。方法]以津优1号黄瓜为试验材料,研究6个不同pH（6.5、5.04、.03、.5、3.02、.5）的模拟酸雨对黄瓜种子萌发和幼苗生理特性的影响。结果]pH≤3.5的酸雨胁迫对黄瓜种子的发芽率、发芽势、发芽指数和活力指数均表现明显抑制作用,pH 2.5时,种子不萌芽;根（茎）抑制指数随pH降低而升高,同一pH下对主根的抑制强于茎,pH 5.0的弱酸对侧根的形成有促进作用;随着pH逐渐下降,根系活力和POD活性呈先升高后降低的趋势,而相对电导率和MDA含量一直上升。结论]酸雨对黄瓜种子萌发及幼苗生理活动影响的阈值大致在pH 3.5。
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| 关 键 词： | 模拟酸雨 黄瓜 种子萌发 活性氧 抗性 |
Effect of the Simulated Acid Rain on Seed Germination and Seedling Physiological Characteristics of Cucumber |
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| Institution: | WANG Hui et al(School of Life Science,Neijiang Teachers College,Neijiang,Sichuan 641112) |
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| Abstract: | Objective] The reference for the corrective assessment of the loss of large-scale cucumber production caused by acid rain was provided through the measurement of its tolerance to acid rain.Method] The effect of six different simulated acid rains with the pH values of 6.5,5.0,4.0,3.5,3.0 and 2.5 on the seed germination and the seedling physiological characteristics of the cucumber variety-Jinyou 1 as experimental material was studied.Result] The stress of the acid rain with pH ≤ 3.5 obviously inhibited the seed germination rate,germination energy,germination index and vigor index.While the pH value was 2.5,the seeds did not sprout.The inhibition index of the acid rain to root(stem) was intensified with the reduction of the pH value and under the condition of same pH value,its inhibition to main root was stronger than that to stem.The acid rain with the pH=5.0 was with the promotion to the formation of lateral root.As the pH value-decreasing,the activity root system and POD was firstly increased and then decreased,while the relative conductivity and the content of MDA had been increased.Conclusion] The threshold of the acid rain affecting the seed germination and seedling physiological activity of the cucumber was in the pH value of about 3.5. |
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| Keywords: | Simulated acid rain Cucumber Seed germination Reactive oxygen Resistance |
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