| 外源SLs和纳米K2MoO4对干旱胁迫下油菜种子萌发的影响 |
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| 引用本文： | 庞星月,万林,李素,王宇航,刘晨,肖晓璐,李心昊,马霓.外源SLs和纳米K2MoO4对干旱胁迫下油菜种子萌发的影响[J].作物杂志,2022,38(4):214-617. |
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| 作者姓名： | 庞星月 万林 李素 王宇航 刘晨 肖晓璐 李心昊 马霓 |
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| 作者单位： | 中国农业科学院油料作物研究所/农业农村部油料作物生物学与遗传育种重点实验室,430062,湖北武汉 |
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| 基金项目： | 农业农村部油料作物生物学与遗传育种重点实验室开放课题基金(KF2020006);国家自然科学基金(31971855);中国农业科学院科技创新工程(CAASASTIP-2016-OCRI) |
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| 摘 要： | 干旱胁迫是油菜种子萌发和生长发育的主要限制因子之一。以甘蓝型油菜品种Q2（抗旱型）和秦优8号（干旱敏感型）为试验材料,研究干旱对油菜种子萌发的影响,探讨外源生长调节物质独脚金内酯（SLs）和纳米材料（n-K2MoO4）对干旱胁迫下油菜种子萌发的生理调控作用。结果表明,干旱胁迫显著抑制种子萌发,SLs和n-K2MoO4均可显著提高发芽率,增加幼苗干重和子叶叶绿素含量,提高超氧化物歧化酶、过氧化物酶活性及可溶性糖、脯氨酸含量,降低丙二醛含量。0.10µmol/L GR24+0.24mmol/L K2MoO4对干旱胁迫下种子萌发和氧化损伤的缓解效应较好。外源SLs和n-K2MoO4通过提高油菜种子萌发期的保护酶活性和渗透调节物质含量来提高抗旱性。本研究表明植物激素和纳米材料在农业生产中具有应用价值。
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| 关 键 词： | 独脚金内酯 纳米材料 干旱胁迫 种子萌发 生理机制 |
| 收稿时间： | 2021-04-22 |
Effects of Exogenous SLs and Nano-K2MoO4 on Seed Germination of Brassica napus L. under Drought Stress |
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| Pang Xingyue,Wan Lin,Li Su,Wang Yuhang,Liu Chen,Xiao Xiaolu,Li Xinhao,Ma Ni.Effects of Exogenous SLs and Nano-K2MoO4 on Seed Germination of Brassica napus L. under Drought Stress[J].Crops,2022,38(4):214-617. |
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| Authors: | Pang Xingyue Wan Lin Li Su Wang Yuhang Liu Chen Xiao Xiaolu Li Xinhao Ma Ni |
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| Institution: | Oil Crops Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, Hubei, China |
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| Abstract: | Drought stress is one of the major abiotic constraints affecting rapeseed (Brassica napus L.) germination and growth. Using Q2 (drought-resistant) and Qinyou 8 (sensitive) as materials, the effects of drought on germination and the physiological mechanmism of seed germination under drought treated by exogenous growth regulators strigolactones (SLs) and nanomaterials (n-K2MoO4) were explored. The findings demonstrated that drought stress significantly inhibited seed germination, SLs and n-K2MoO4 significantly increased germination rate, seedling dry weight, and cotyledon chlorophyll content, as well as superoxide dismutase and peroxidase activities and soluble sugar, proline, and decreased malondialdehyde contents. In comparison to other treatments, 0.10μmol/L GR24 with 0.24mmol/L n-K2MoO4 exhibited stronger mitigation effects on seed germination and oxidative damage. According to this study, exogenous SLs and n-K2MoO4 could increase the activities of protective enzymes and the levels of osmotic regulators during rapeseed germination, which improved the ability to withstand drought. The results indicate plant hormones and nanomaterials might be used in agriculture. |
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| Keywords: | Strigolactones Nanomaterial Drought stress Seed germination Physiological mechanism |
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