摘要
以蒙农杂种冰草种子为材料,采用人工模拟碱(Na HCO3)胁迫,设10、30、60、90、120 mmol·L^-15个浓度作为碱处理,各浓度添加1. 0 mmol·L^-1Na2Si O3溶液作为碱+硅处理,研究碱胁迫下硅对冰草种子萌发的影响。结果显示,在不同浓度的碱胁迫下添加外源硅有助于提高冰草种子发芽势、发芽率、发芽指数、活力指数、胚根和胚芽生物量以及发芽整齐度(P<0. 05),明显缩短萌发时间,表明在碱胁迫下硅参与种子的萌发过程,在一定程度上降低渗透胁迫和离子毒害,增强冰草种子在碱胁迫下的抵抗力。
In order to study effects of silicon on seed germination of Agropyron cristatum cv. Mengnong under alkaline stress,the seed performance under alkaline+sili con treatments including five alkaline( NaHCO3) evaluated. The results showed that Na2SiO3 treatment increased( P<0. 05) germination energy significantly,germination percentage,seed germination index,vigor index,biomass and significantly reduced( P<0. 05) germination time. The results preliminary explained that silicon involved in the germination under alkaline stress,reduced osmotic stress and ion toxicity and enhanced seed resistance.
作者
孙娜
米福贵
闫士元
解颖
SUN Na;MI Fu-gui;YAN Shi-yuan;XIE Ying(College of Grassland,Resources and Environment,Inner Mongolia Agricultural University,Key laboratory of Grassland Resources,Ministry of Education,Hohhot 010011,China)
出处
《草学》
2019年第6期45-52,共8页
Journal of Grassland and Forage Science
基金
中欧政府间国际合作专项(2017YFE0111000)资助
关键词
蒙农杂种冰草
外源硅
萌发
碱胁迫
Agropyron cristatum
exogenous silicon
germination
alkaline stress
