| 外源褪黑素处理对月季幼苗盐胁迫的缓解效应 |
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| 引用本文： | 刘政,胡孙田,沈晓飞,朱培,褚旭东,李卓娅,罗平.外源褪黑素处理对月季幼苗盐胁迫的缓解效应[J].浙江农林大学学报,2020,37(5):957-962. |
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| 作者姓名： | 刘政 胡孙田 沈晓飞 朱培 褚旭东 李卓娅 罗平 |
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| 作者单位： | 1.长兴县林业局，浙江 长兴 3131002.长兴县林场，浙江 长兴 3131003.浙江农林大学 风景园林与建筑学院，浙江 杭州 3113004.浙江农林大学 农业与食品科学学院，浙江 杭州 311300 |
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| 基金项目： | 湖州市科技计划资助项目(2018GZ19)；浙江农林大学人才启动资助项目(2016FR033)；浙江省自然科学基金资助项目(LQ18C150001) |
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| 摘 要： | 目的 研究外源褪黑素(MT)处理对盐胁迫下中国古老月季‘月月粉’ Rosa chinensis ‘Old Blush’的缓解效应及其机制，为解决月季栽培中的盐害问题提供理论依据。 方法 以90 d扦插苗为材料，分别通过根部浇灌0、5、10和20 μmol·L?1褪黑素进行预处理5 d后，再对根部浇灌200 mmol·L?1氯化钠溶液进行盐胁迫处理20 d，以浇灌清水的植株为空白对照，研究了外源褪黑素处理对月季盐胁迫的缓解效应。 结果 与空白对照相比，不同浓度外源褪黑素处理可显著降低盐胁迫下月季叶片的相对电导率和丙二醛质量摩尔浓度(P＜0.05)，同时可显著提高可溶性蛋白质、抗坏血酸和脯氨酸的质量分数(P＜0.05)，特别是显著提高了超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性，从而增强了活性氧的清除能力。 结论 外源褪黑素处理可增强月季‘月月粉’的抗氧化酶活性以及渗透调节物质的质量分数，从而抑制活性氧的积累，防止膜脂过氧化，提高耐盐性。图3参21
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| 关 键 词： | 植物生理学 月季‘月月粉’ 褪黑素 盐胁迫 缓解效应 |
| 收稿时间： | 2019-10-14 |
Alleviation of exogenous melatonin on rose seedlings under salt stress |
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| LIU Zheng,HU Suntian,SHEN Xiaofei,ZHU Pei,CHU Xudong,LI Zhuoya,LUO Ping.Alleviation of exogenous melatonin on rose seedlings under salt stress[J].Journal of Zhejiang A&F University,2020,37(5):957-962. |
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| Authors: | LIU Zheng HU Suntian SHEN Xiaofei ZHU Pei CHU Xudong LI Zhuoya LUO Ping |
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| Affiliation: | 1.Forestry Bureau of Changxing County, Changxing 313100, Zhejiang, China2.Forest Farm of Changxing County, Changxing 313100, Zhejiang, China3.School of Landscape Architecture, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China4.School of Agricultural and Food Sciences, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China |
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| Abstract: | Objective To provide a theoretical basis for solving salt damage of rose, the effect of exogenous melatonin (MT) on the physiological characteristics of rose seedlings (Rosa chinensis ‘Old Blush’) with the NaCl stress was investigated. Method 90 d rose cutting seedlings were watered with 0, 5, 10 and 20 μmol·L?1 melatonin of exogenous melatonin solution respectively for 5 days before they were treated with 20 d 200 mmol·L?1 NaCl while the control group was treated with water to study the alleviation of exogenous melatonin on rose seedlings under salt stress with the physiological and biochemical indexes determined after the salt treatment. Result With the exposure to salt stress, rose seedlings with the alleviation of exogenous melatonin of different concentrations present a significant decrease in electrical conductivity and mass molar concentration of malondialdehyde(P＜0.05) while a significant increase in the content of soluble protein, proline and ascorbic acid (P＜0.05). In particular, the activity of superoxide dismutase(SOD), catalase(CAT) and peroxidase(POD)(P＜0.05)has been significantly promoted, which helps enhance the scavenging activity of reactive oxygen species(ROS) under salt stress. Conclusion The exogenous melatonin treatment could enhance the activity of antioxidant enzymes and increase the osmotic substance content to avoid lipid peroxidation and improve rose salt tolerant ability. Ch, 3 fig. 21 ref.] |
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