| 褪黑素对扁茎黄芪种子萌发和幼苗生长的影响 |
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| 引用本文： | 谢丰璞,徐蓉蓉,高静,关思静,葛甜甜,张亚丽,王楠,颜永刚,李铂,黄文静.褪黑素对扁茎黄芪种子萌发和幼苗生长的影响[J].中国农学通报,2022,38(25):60-71. |
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| 作者姓名： | 谢丰璞 徐蓉蓉 高静 关思静 葛甜甜 张亚丽 王楠 颜永刚 李铂 黄文静 |
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| 作者单位： | 1.陕西中医药大学陕西中药资源产业化省部共建协同创新中心，陕西咸阳 712083;2.秦药特色资源研究开发国家重点实验室（培育），陕西咸阳 712083;3.陕西中医药大学药学院，陕西咸阳 712046 |
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| 基金项目： | 现代农业产业技术体系建设专项资金(CARS-21);2018年中医药公共卫生服务补助专项“全国中药资源普查项目”(财社〔2018〕43号);陕西中医药大学校级科研课题“间作介导的生态位差异对黄芪产量和品质的影响研究”(2020GP01);内蒙古自治区科技重大专项“高品质蒙药材中药材规模化种植技术体系研究与示范”子课题“黄芪;桔梗2种蒙药材中药材生态种植技术和标准化研究”(2019ZD005);陕西省中医药管理局中医药全省性专款专项“秦药中药材种植养殖指南研究”(2021-QYZL-02) |
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| 摘 要： | 探讨不同温度与盐和干旱交互胁迫的条件下，褪黑素对扁茎黄芪种子萌发和幼苗生长的影响。利用6个不同浓度的褪黑素溶液对扁茎黄芪种子进行浸种处理，NaCl和PEG溶液分别模拟盐和干旱环境为实验组，蒸馏水处理为对照组，处理过的种子分别置于4个温度下(15、20、25、30℃)，萌发实验结束后进行萌发指标和幼苗生长指标测定。结果表明，同一温度下随着干旱程度的增加，扁茎黄芪种子最终发芽率降低(P<0.05);盐胁迫和干旱胁迫下，各温度下平均发芽时间随着胁迫程度的增加而增加(P<0.05);同一温度下，胚根长和子叶随着盐胁迫和干旱胁迫渗透势的增加而降低;同一渗透势胁迫下，胚根长随着温度的增加而先增加后减少;30℃下胁迫为-0.7 MPa时，扁茎黄芪在盐胁迫下种子萌发后幼苗的生长受到抑制，而干旱胁迫下某些处理组种子未发芽。25℃和20℃分别是本实验中适合扁茎黄芪在盐和干旱条件下萌发与生长的最适温度;在相同温度下其耐盐性大于耐旱性，且随着胁迫程度的增加，其生长受到抑制;褪黑素处理在一定程度上缓解了胁迫对扁茎黄芪造成的影响。
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| 关 键 词： | 褪黑素 扁茎黄芪 胁迫 缓解 渗透势 |
| 收稿时间： | 2020-11-26 |
Effects of Melatonin on Seed Germination and Seedling Growth of Astragalus complanatus |
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| XIE Fengpu,XU Rongrong,GAO Jing,GUAN Sijing,GE Tiantian,ZHANG Yali,WANG Nan,YAN Yonggang,LI Bo,HUANG Wenjing.Effects of Melatonin on Seed Germination and Seedling Growth of Astragalus complanatus[J].Chinese Agricultural Science Bulletin,2022,38(25):60-71. |
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| Authors: | XIE Fengpu XU Rongrong GAO Jing GUAN Sijing GE Tiantian ZHANG Yali WANG Nan YAN Yonggang LI Bo HUANG Wenjing |
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| Institution: | 1.Co-construction Collaborative Innovation Center for Chinese Medicine Resources Industrialization by Shaanxi & Education Ministry, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712083;2.State Key Laboratory of Research & Development of Characteristic Qin Medicine Resources (Cultivation), Xianyang, Shaanxi 712083;3.College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046 |
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| Abstract: | To explore the effects of melatonin on the seed germination and seedling growth of Astragalus complanatus under different temperature, and salt and drought stresses, six melatonin solutions of different concentrations were used to soak the seeds of A. complanatus. The solutions of NaCl and PEG simulating salt and drought environment were used as the experimental groups, respectively, and the distilled water treatment was regarded as the control group. The treated seeds were cultured at 4 different temperatures (15, 20, 25 and 30℃), the germination indicators and seedling growth indicators were measured and calculated after the germination experiment. The results showed that at the same temperature, the total germination percentage of A. complanatus seeds decreased with the increase of drought degree (P<0.05). Under the stresses of salt and drought, the mean germination time at each temperature increased with increasing levels of stress (P<0.05). The length of radicle and cotyledon decreased as the salt stress and drought stress increased at the same temperature. Under the same osmotic potential, the radicle length first increased and then decreased with the increase of temperature. When the stress of -0.7 MPa was at 30℃, the growth of A. complanatus seedlings was inhibited after seed germination under salt stress, while the seeds of some treatment groups did not germinate under drought stress. In this experiment, 25℃ was the optimum temperature for the germination and growth of A. complanatus under salt condition, while 20℃ was the optimum temperature under drought stress. The salt tolerance of A. complanatus was greater than that under drought stress at the same temperature. And as the degree of stress increased, its growth was inhibited. After being treated with melatonin, the effect of stresses on A. complanatus was alleviated to a certain extent. |
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| Keywords: | melatonin Astragalus complanatus stress alleviate osmotic potential |
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