盐分和水分胁迫对补血草种子萌发的影响  

Effects of salt and water stress on seed germination of Limonium

作　　者：刘萍[1] 周玲玲[2] 王军[1] 

机构地区：[1]新疆农垦科学院棉花研究所农业新技术推广服务中心,新疆石河子832000 [2]石河子大学生命科学学院,新疆石河子832000

出　　处：《干旱地区农业研究》2008年第4期167-171,共5页Agricultural Research in the Arid Areas

基　　金：国家重大基础研究前期研究专项基金资助项目(2002CCA02800);新疆特种植物药资源教育部重点实验室开放课题

摘　　要：在不同昼夜温度条件下用不同浓度NaCl（mmol/L）溶液及等渗聚乙二醇溶液处理大叶补血草（Limo-nium gmelinii（Willd.）Kuntze）和耳叶补血草（Limonium otolepis（Schrenk）Kuntze）种子,分别测定其萌发率、发芽势和发芽指数,测定处理9 d未萌发的种子移入蒸馏水后的萌发恢复率,以研究温度、盐胁迫和模拟干旱胁迫对种子萌发的影响。结果表明：两种补血草种子萌发的最适温度为25-15℃,在蒸馏水中的萌发率最高,随着盐浓度和PEG6000溶液浓度的增加,种子的萌发率、发芽势和发芽指数递减,对萌发产生抑制作用;PEG6000溶液对种子的萌发抑制程度与等渗NaCl溶液相当。较高盐浓度和PEG6000溶液处理下的种子复水后萌发可以恢复。Seeds of L.gmelinii and L.otolepis were germinated 9 days at different temperature regimes in different concentration of NaCl solution and iso-osmotic PEG6000.According to the germination rate,germination potential,germination index and the germination recovery percentage of seeds that were incubated in NaCl and PEG6000 solutions for 9 days recovered after being transferred to distilled water.A conclusion could be drawn that a temperture regime of 15℃ at night and 25℃ in day time yielded optimal germination rate.Germination rate was the highest in the distilled water.The germination rate,germination potential and germination index increased along with the reducing of NaCl and iso-osmotic PEG6000 concentrations,which had inhibitory effect on the germination of seeds.The inhibitory level of PEG6000 was as much as that of iso-osmotic NaCl.

关 键 词：大叶补血草 耳叶补血草 盐胁迫 水分胁迫 萌发 

分 类 号：Q945.34[生物学—植物学]