外源赤霉素浸种对盐胁迫下高羊茅种子萌发和幼苗生长的影响  

Effects of soaking seeds with exogenous gibberellin on seed germination and seedling growth of tall fes⁃cue under salt stress

作　　者：陈本菊 刘容 李振华 刘敏婷 赵心笛 路佳音 柴琦[1] CHEN Ben-ju;LIU Rong;LI Zhen-hua;LIU Ming-ting;ZHAO Xin-di;LU Jia-yin;CHAI Qi(College of Grassland Agricultural Science and Technology,Lanzhou University,Lanzhou 730020,China)

机构地区：[1]兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《草原与草坪》2024年第4期103-112,共10页Grassland and Turf

摘　　要：【目的】探究外源赤霉素浸种对盐胁迫下高羊茅种子萌发和幼苗生长的影响。【方法】以高羊茅火凤凰2号为材料,采用纸上发芽法,设置20个处理,用0、100、150、200、300 mg/L GA溶液浸泡高羊茅种子2 d,然后将其分别置于含0、100、200、250 mmol/L NaCl溶液的培养皿中进行萌发试验,并测定种子萌发和幼苗生长的相关指标。【结果】在100 mmol/L盐胁迫下,能缓解盐胁迫进而促进种子萌发和幼苗生长的最佳GA浓度为200 mg/L,种子萌发各项指标优于0 mg/L GA处理,在200、250mmol/L盐胁迫下,能缓解盐胁迫从而促进种子萌发和幼苗生长的最佳GA浓度为150 mg/L,种子萌发各项指标略优于0 mg/L GA处理。【结论】模糊数学隶属函数法对不同浓度GA溶液浸种缓解盐胁迫能力综合分析证明,能够缓解盐胁迫并促进种子萌发和幼苗生长的较佳赤霉素浓度为150 mg/L。【Objective】The study was carried out to investigate the effect of exogenous gibberellin infusion on seed germination and seedling growth of tall fescue under salt stress.【Method】In this experiment,tall fescue"Fire Phoenix 2"was used as experimental material,and paper germination method was adopted.Twenty treatment groups were set up to soak tall fescue seeds with 0,100,150,200 and 300 mg/L GA solution for 2 days,and then placed them in petri dishes containing 0,100,200 and 250 mmol/L NaCl solution for germination test,and the re-lated indexes of seed germination and seedling growth were determined respectively.【Result】The analysis of related indexes showed that under 100 mmol/L salt stress,the optimal GA concentration for alleviating salt stress and thus promoting seed germination and seedling growth was 200 mg/L,and all the indexes of seed germination were better than those of the 0 mg/L GA treatment,and under 200 and 250 mmol/L salt stress,the optimal GA concentration for alleviating salt stress and thus promoting seed germination and seedling growth was 150 mg/L,and all the indexes of seed germination were slightly better than those of the 0 mg/L GA treatment.【Conclusion】The comprehensive analysis of salt stress relieving ability of different concentration GA solution by fuzzy mathematical membership func-tion method showed that the best concentration of gibberellin which could relieve salt stress and promote seed germi-nation and seedling growth was 150 mg/L.

关 键 词：高羊茅 盐胁迫 赤霉素 种子萌发 幼苗生长 

分 类 号：S543.9[农业科学—作物学]