北方农业学报 ›› 2021, Vol. 49 ›› Issue (2): 129-134.doi: 10.12190/j.issn.2096-1197.2021.02.20

• 园艺 • 上一篇    

PEG引发对洋葱种子萌发及幼苗生理指标的影响

单昕昕1, 张仕林2, 陈晖1, 王瑞1, 厉恩铜1, 王建军1   

  1. 1.南京农业大学作物遗传与种质创新国家重点实验室/农业农村部华东地区园艺作物生物学与种质创制重点实验室,江苏 南京 210095;
    2.上海蔬菜研究所,上海 201899
  • 收稿日期:2021-03-01 出版日期:2021-04-20 发布日期:2021-06-21
  • 通讯作者: 王建军(1969—),男,副教授,硕士,主要从事不结球白菜和洋葱育种及栽培的研究工作。
  • 作者简介:单昕昕(1995—),女,硕士研究生,主要从事洋葱育种的研究工作。
  • 基金资助:
    江苏省科技计划苏北专项(LYG-SZ201928)

Effect of PEG priming on seed germination and seedling physiological indexes in onion

SHAN Xinxin1, ZHANG Shilin2, CHEN Hui1, WANG Rui1, LI Entong1, WANG Jianjun1   

  1. 1. State Key Laboratory of Crop Genetics and Germplasm Enhancement,Nanjing Agricultural University/Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in Eastern China,Ministry of Agriculture and Rural Affairs,Nanjing 210095,China;
    2. Shanghai Vegetable Research Institute,Shanghai 201899,China
  • Received:2021-03-01 Online:2021-04-20 Published:2021-06-21

摘要: 【目的】 研究不同浓度聚乙二醇(PEG)对洋葱种子萌发及幼苗生理指标的影响。【方法】 以3个洋葱品种圣1-16、W465和W433种子为试验材料,在20 ℃黑暗条件下采用0(CK)、10%、20%和30%的PEG引发处理8 h后,分析各处理洋葱种子发芽及幼苗生长和生理指标。【结果】 与对照相比,PEG处理显著(P<0.05)提高洋葱种子发芽率、发芽势、干重、鲜重,30% PEG引发浓度为最适浓度。30% PEG引发处理下,洋葱幼苗SOD、POD活性提高3.84%~15.23%、39.11%~62.22%,MAD含量下降11.84%~14.83%;幼苗根系活力显著提升。【结论】 30%PEG引发后的洋葱种子萌发效果较好,对其幼苗的生长有显著促进作用。

关键词: PEG引发, 洋葱, 发芽率, 生理指标, 根系活力

Abstract: 【Objective】To study the effects of different concentrations of polyethylene glycol(PEG)on onion seed germination and seedling physiological indexes.【Methods】The seeds of 3 onion varieties,St.1-16,W465 and W433,were treated with 0(CK),10%,20% and 30% PEG for 8 h under the dark condition of 20 ℃,and the germination and seedling growth and physiological indexes of each treatment were analyzed.【Results】Compared with the control,PEG treatment significantly(P<0.05)increased the germination rate,germination potential,dry weight,and fresh weight of onion seeds. The optimal PEG priming concentration was 30%. Under the treatment of 30% PEG,the SOD and POD activity of onion seedling increased by 3.84% to 15.23%,39.11% to 62.22%,MAD content decreased by 11.84% to 14.83%;the root activity of seedlings were significantly improved.【Conclusion】The germination effect of onion seeds after 30% PEG priming was better,and there was a significant role in the growth of its seedlings.

Key words: PEG priming, Onion, Germination rate, Physiological index, Root vitality

中图分类号: 

  • S633.2