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。
【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.
作者
单昕昕
张仕林
陈晖
王瑞
厉恩铜
王建军
SHAN Xinxin;ZHANG Shilin;CHEN Hui;WANG Rui;LI Entong;WANG Jianjun(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;Shanghai Vegetable Research Institute,Shanghai 201899,China)
出处
《北方农业学报》
2021年第2期129-134,共6页
Journal of Northern Agriculture
基金
江苏省科技计划苏北专项(LYG-SZ201928)。
关键词
PEG引发
洋葱
发芽率
生理指标
根系活力
PEG priming
Onion
Germination rate
Physiological index
Root vitality
