PEG引发对洋葱种子萌发及幼苗生理指标的影响

doi:10.12190/j.issn.2096-1197.2021.02.20

Abstract

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

CLC Number:

S633.2

SHAN Xinxin, ZHANG Shilin, CHEN Hui, WANG Rui, LI Entong, WANG Jianjun. Effect of PEG priming on seed germination and seedling physiological indexes in onion[J].Journal of Northern Agriculture, 2021, 49(2): 129-134.

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URL: https://journal30.magtechjournal.com/bfnyxb/EN/10.12190/j.issn.2096-1197.2021.02.20

https://journal30.magtechjournal.com/bfnyxb/EN/Y2021/V49/I2/129

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

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