| 摘要: |
| 分别在5，8 ℃低温胁迫下，对耐寒性不同的两个茄子品种叶片内部抗寒性生理生化指标进行了研究。结果表明，随温度降低，两品种细胞膜透性增大，MDA含量增加，SOD和POD活性上升，CAT活性变化表现相反的趋势，但低温处理与对照温度间差异较小；脯氨酸含量也随胁迫温度降低而呈增加趋势。低温下耐寒性强的品种能保持更高的SOD和POD等保护酶活性、更好的细胞膜完整性和更低的MDA含量，并诱导产生更多的脯氨酸。 |
| 关键词: 低温胁迫 茄子幼苗 抗寒性 膜脂过氧化 保护酶系统 脯氨酸 |
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| 基金项目:宁夏回族自治区自然科学基金资助项目(C231) |
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| Effects of chilling stress on chill-resistance physiological and biochemical indexes of eggplant seedlings |
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| Abstract: |
| The physiologica and biochemical indexes related chill-resistance in the leaves of two different chilling-sensitive eggplant cultivars were investigated under 5 ℃ and 8 ℃ low temperatures dropped,the permeability of plasma membrane and the content of malondialdehyde (MDA) increased,the activity of superoxide dismutase (SOD) and peroxidase (POD) raised in two cultivars.Catalase (CAT) activities in high chilling-resistance cultivar decreased first and then increased,but there was no big difference among treatments and the control.The raising trend of proline (Pro) content was found with chilling stress.The chilling resistant cultiver showed higher activites of SOD and POD,lower permeability of plasma membrane and production of MDA,and induction of more proline content. |
| Key words: chilling stress eggplant seedling chill-resistance membranelipid peroxidation protective enzyme proline |
