| 引用本文: | 贺立恒,郝杰,史敏莉,等.烯效唑浸种对干旱胁迫下燕麦种子萌发及幼苗抗旱生理特性的影响[J].灌溉排水学报,2022,(10):-. |
| HE Liheng,Hao Jie,Shi Minli,et al.烯效唑浸种对干旱胁迫下燕麦种子萌发及幼苗抗旱生理特性的影响[J].灌溉排水学报,2022,(10):-. |
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| 摘要: |
| 【目的】探究不同质量浓度烯效唑浸种对2个燕麦品种种子萌发、幼苗生长和抗旱生理特性的影响。【方法】采用二因素随机试验，2个燕麦品种分别为0117-119（V1）和YY11-18（V2），烯效唑设4个质量浓度，分别为0 mg/L（U1）、15 mg/L（U2）、30 mg/L（U3）和45 mg/L（U4）。【结果】V1U1处理的发芽势为52.00%，显著高于其他处理（p<0.05）； V1U2处理的发芽率为72.67%，显著高于其他处理（p<0.05）。V2U4处理的发芽势和发芽率均最低，分别为18%和36%。苗高、最大根长及冠层干重均表现为V1U1处理最高，V2U4处理最低。V1U2处理的侧根数、根干质量及根冠比均最高，分别为6.30 个、4.33 mg和0.34，均显著高于其他各处理（p<0.05）。V1U2处理的超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）活性、根系活力和脯氨酸量均最高，分别达到150.22 U/g、34.83 U/g、387.35 U/g、239.43 μg/(g·h)和298.88 μg/g，均显著高于其他各处理（p<0.05），但是，V1U2处理的丙二醛量则显著低于其他处理（p<0.05），为7.28 nmol/g 。V1U4处理的叶绿素a、叶绿素b和总叶绿素量最高，分别为1.51、0.58 mg/g和2.12 mg/g，均显著高于其他处理（p<0.05）。因此，适宜质量浓度烯效唑处理可促进燕麦根系的生长发育，并通过调控燕麦植物体内保护酶的活性，有效清除活性氧来降低干旱对植株引起的伤害，促进有机物质的合成，提高燕麦的抗旱能力。【结论】综上可知，燕麦品种0117-119的抗旱能力优于品种YY11-18，15 mg/L烯效唑质量浓度浸种最好，品种0117-119和15 mg/L烯效唑的处理组合较优。 |
| 关键词: 燕麦；烯效唑；干旱胁迫；种子萌发；抗旱生理 |
| DOI： |
| 分类号:S519 |
| 基金项目:国家自然科学基金项目（31571611）、山西省重点研发计划项目（201803D221008-6）、山西农谷建设科研专项（SXNGJSKYZX201703）、山西省“1331工程”资助 |
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| Effects of seed soaking with uniconazole on oat seed germination and physiological characteristics of young seedling under drought stress |
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HE Liheng, Hao Jie, Shi Minli, Jia Xiaoyun, SONG Xi e
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Shanxi Agricultural University
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| Abstract: |
| 【Objective】The purpose of this paper is to investigate the effects of seed soaking with different concentrations of uniconazole on oat seed germination and seedling physiological characteristics under drought stress. 【Method】Two factor random design experiment on oat varieties and uniconazole concentrations was used in this experiment. The two oat varieties were 0117-119 (V1) and YY11-18 (V2). Uniconazole concentrations were 0 mg/L (U1), 15 mg/L (U2), 30 mg/L (U3) and 45 mg/L (U4). 【Result】The germination potential of variety 0117-119 with 0 mg/L uniconazole (V1U1) and the germination rate of variety 0117-119 with 15 mg/L uniconazole (V1U2) were the highest (p<0.05), which were 52.00% and 72.67%, respectively. The treatment YY11-18 with 45 mg/L uniconazole (V2U4) had the lowest germination potential and germination rate, which were 18% and 36%, respectively. The young shoot length, maximum root length and crown dry weight were the highest in V1U1 treatment and the lowest in V2U4 treatment. The number of lateral roots, root dry weight and root-crown ratio of V1U2 treatment were significantly higher than those of other treatments (p<0.05), which were 6.30, 4.33 mg and 0.34, respectively. The treatment of V1U2 had the best SOD, POD, CAT, root vigor and proline contents with a value of 150.22 U/g, 34.83 U/g, 387.35 U/g, 239.43 μg/(g·h) and 298.88 μg/g, respectively, but the lowest malondialdehyde contents with a value of 7.28 nmol/g. The contents of chlorophyll a, chlorophyll b and total chlorophyll in variety 0117-119 with 45 mg/L uniconazole (V1U4) treatment were significantly higher than those in other treatments (p<0.05), which were 1.51 mg/g, 0.58 mg/g and 2.12 mg/g, respectively.【Conclusion】The drought resistance of oat variety 0117-119 was better than that of variety yy11-18. The seed soaking effect with 15 mg/L uniconazole concentration was the best. The treatment of V1U2 had the best performance. These findings showed that seed soaking treatment with appropriate concentration of uniconazole can effectively alleviate the damage caused by drought stress on oat seedlings, thereby improving their ability to drought tolerance. The results will lay a foundation for in-depth study on the drought resistance mechanism and regulation technology of oat in arid areas. It also will provide theoretical basis and technical support for promoting oat crop production and even the development of oat industry in arid areas of northern China. |
| Key words: Oat; Uniconazole; Drought Stress; Seed germination; Drought-resistant physiology |
