摘要
以大花剪秋萝种子为试材,采用模拟盐环境、碱环境及干旱环境的方法,研究了氯化钠溶液(模拟盐环境)、碳酸钠溶液(模拟碱环境)和聚乙二醇溶液(模拟干旱环境)对大花剪秋萝种子的影响,以期实现植物在盐渍化及干旱地区播种育苗和园林绿化应用的科学前景。结果表明:在干旱胁迫下,随着PEG浓度的增加,种子活性降低,生命力逐渐丧失,种子的发芽率、相对发芽率等指标呈下降趋势,在10%及15%PEG浓度胁迫时,发芽率等指标均为0。在盐碱胁迫下,氯化钠溶液浓度为0.90%时,发芽率极低,仅为1.11%,而碳酸钠溶液浓度为0.30%时,发芽率为0,可知碱胁迫对种子萌发的抑制作用比盐胁迫更强。在复萌试验中,较低浓度时复萌率随浓度升高而上升,在浓度0.90%盐碱溶液和5%PEG溶液时复萌率最高,当浓度增加时对种子造成不可修复的损伤,使其彻底失去发芽能力,此后种子的复萌率又开始下降。
With seeds of Lychnis fulgens Fisch.as test materials,using the method that salt environment,alkaline environment and arid environment were simulated,the sodium chloride solution(simulated salt environment),sodium carbonate solution(simulated alkaline environment)and polyethylene glycol solution(simulated drought environment)on the impact of Lychnis fulgens Fisch.were studied,in order to realize the scientific prospect of plant planting and planting and garden greening in salinization and arid areas.The results showed that the germination rate,relative germination rate and other indexes of seeds showed a decreasing trend with the increase of PEG concentration under drought stress,and the germination rate and other indexes of seeds were 0 when PEG concentration were 10%and 15%.Under salinity and alkali stress,the germination rate was very low when the concentration of sodium chloride solution was 0.90%,only 1.11%,while the germination rate was 0 when the concentration of sodium carbonate solution was 0.30%.It can be seen that alkali stress had a stronger inhibitory effect on seed germination than salt stress.In the relapse test,the relapse rate increased with the increase of the concentration at a lower concentration,and was the highest when the concentration was 0.90%saline solution and 5%PEG solution.When the concentration was further increased,irreparable damage was caused to the seeds,making them completely lose the ability to germinate.After that,the relapse rate of the seeds began to decline again.
作者
岳莉然
程贝贝
YUE Liran;CHENG Beibei(College of Landscape Architecture,Northeast Forestry University,Harbin,Heilongjiang 150040)
出处
《北方园艺》
CAS
北大核心
2019年第10期86-93,共8页
Northern Horticulture
基金
中央高校基本科研业务费专项资金资助项目(2572014BA22)
关键词
盐碱胁迫
干旱胁迫
大花剪秋萝
PEG
saline-alkali stress
drought stress
Lychnis fulgens Fisch.
PEG
