| Cite this article: | 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):-. |
|
| |
|
|
| This article has been：Browse 774Times Download 0Times |
|
|
|
| DOI： |
|
| Effects of seed soaking with uniconazole on oat seed germination and physiological characteristics of young seedling under drought stress |
|
HE Liheng, Hao Jie, Shi Minli, Jia Xiaoyun, SONG Xi e
|
|
Shanxi Agricultural University
|
| 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 |
|
|
|
|
|
|
