Effects of PEG 6000 Simulated Drought Stress Environment on Physiological Characteristics of Seeds and Seedlings of Chinese Onion
GUO Zijun
XIE Shuqin
WEI Yongpin
LV Hailong
CAO Liqiang
ZHANG Dan
WANG Jiaomin
Abstract：To investigate the differences degrees of drought in seed germination and seedling growth of three varieties of Chinese onion,and to explore the effects of osmotic stress on the drought tolerance of scallion seed germination and seedling growth,Zhangqiu scallion,Longyin scallion,and Taoyin scallion were used as materials.The method of seed culture dish germination and seedling pot cultivation was adopted.Four different concentrations(0,5%,10%,15%)of polyethylene glycol(PEG 6000)were set to simulate water drought,and the scallion seeds and seedlings were treated to measure their germination rate,germination potential,root length,hypocotyl length,seedling growth,photosynthetic pigment content,and root vitality content.The results showed that with the increase of PEG 6000 concentration,the germination rate,germination potential,root length and hypocotyl length of Chinese onion seeds showed a gradually decreasing trend.The root activity of control treatment was significantly higher than that of other treatments.Compared with 10%PEG 6000 concentration,at 15%PEG 6000 concentration the root activity of Taoyin and Zhangqiu scallion was not significantly reduced,while that of Longyin scallion was significantly decreased.It could be seen that the maximum tolerance concentration of Taoyin and Zhangqiu scallion seedlings was 15%,and that of Longyin scallion seedlings was 10%,which provided a theoretical basis for the development and introduction of scallion resources.
Keywords：Chinese oniondrought stresspolyethylene glycolseed germinationphysiological characteristics
Publication Date：2024-11-20
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：6( 53-57,62 )