Seed Priming With Melatonin Promotes Seed Germination and Seedling Growth of Triticale hexaploide L. Under PEG-6000 Induced Drought Stress
文献类型： 外文期刊
作者： Guo, Yuhui 1 ; Li, Dongxiao 1 ; Liu, Liantao 1 ; Sun, Hongchun 1 ; Zhu, Lingxiao 1 ; Zhang, Ke 1 ; Zhao, Haiming 2 ; Zhang, Yongjiang 1 ; Li, Anchang 1 ; Bai, Zhiying 1 ; Tian, Liwen 3 ; Dong, Hezhong 4 ; Li, Cundong 1 ;
作者机构： 1.Hebei Agr Univ, Coll Agron, State Key Lab North China Crop Improvement & Regul, State Key Lab Cotton Biol Hebei Base,Key Lab Crop, Baoding, Peoples R China
2.Shandong Acad Agr Sci, Cotton Res Ctr, Shandong Key Lab Cotton Culture & Physiol, Jinan, Peoples R China
3.Xinjiang Acad Agr Sci, Inst Ind Crops, Urumqi, Peoples R China
4.Hebei Acad Agr & Forestry Sci, Inst Dryland Farming, Key Lab Crop Drought Resistance Res Hebei Prov, Hengshui, Peoples R China
关键词： drought stress; melatonin; triticale; germination; seedling; antioxidative activity
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）
ISSN： 1664-462X
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Melatonin (N-acetyl-5-methoxytryptamine, MT) can mitigate abotic stress, including drought stress on a number of crops. However, it is unclear whether and how seed priming with melatonin alleviates the effects of drought stress on seed germination and seedling growth of triticale (Triticale hexaploide L.). In this study, we investigated the effects of seed priming with MT on seed germination, protective enzyme activity, superoxide anion, and hydrogen peroxide in triticale under PEG-6000 induced drought stress. Seed priming with 20 mu M MT alleviated the adverse effects of PEG-6000 induced drought stress on seed germination and seedling growth. Triticale seeds primed with 20 mu M MT exhibited improved germination potential, germination rate, germ and radicle length. Specifically, MT priming increased the germination rate by 57.67% compared with unprimed seeds. Seed priming with melatonin also alleviated the adverse effects of PEG-6000 induced drought stress on triticale seedlings. MT pretreatment with 20 mu M significantly increased the net photosynthetic rate, transpiration rate, stomatal conductance, plant height, leaf area, and relative chlorophyll concentration, enhanced the activities of superoxide dismutase and peroxidase, and decreased reactive oxygen species (ROS) and malonaldehyde content in the seeds (germ and radicle) and seedlings (leaf and root). Collectively, these results suggest that seed priming with melatonin promotes ROS scavenging capacity and enhances energy supply and antioxidant enzyme activities to alleviate the adverse effects of drought stress in triticale.
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