不同钠盐胁迫对夏枯草种子萌发特性的影响  

Effects of sodium salt stress on seed germination of Prunella vulgaris

作　　者：张利霞[1] 常青山[2] 侯小改[1] 赵威[1] 洪亚平[1] 戴攀峰[1] 李晓鹏[1] 张耀[1] 

机构地区：[1]河南科技大学农学院,河南洛阳471003 [2]河南科技大学林学院,河南洛阳471003

出　　处：《草业学报》2015年第3期177-186,共10页Acta Prataculturae Sinica

基　　金：国家自然科学基金(41301051);河南科技大学青年科学基金项目(4024-13350065;4026-13350041);河南科技大学博士科研启动基金项目(4024-13480054;4026-13480038);河南科技大学大学生研究训练计划(SRTP)项目(2013241;2014254;2014281)资助

摘　　要：为探明夏枯草种子在不同盐胁迫条件下的萌发特性。采用不同钠盐溶液(NaCl,Na2CO3,Na2SO4,NaCl与Na2CO3混和液,NaCl、Na2CO3与Na2SO4混合溶液)对夏枯草种子进行分别处理,研究不同钠盐胁迫对夏枯草种子发芽率、发芽势、活力指数、鲜重及幼苗根长和苗高的影响。与对照相比,随着不同钠盐溶液浓度的增加,夏枯草种子的发芽率、发芽指数、活力指数、鲜重及幼苗的根长和苗高呈现下降的趋势。夏枯草种子萌发在钠盐处理中表现出低浓度促进、高浓度抑制的特点,一定的低盐浓度处理下的夏枯草种子萌发指标甚至高于对照。夏枯草种子对不同钠盐胁迫的耐受性不同,不同钠盐对种子萌发的抑制程度高低顺序为Na2SO4<NaCl<混合盐(NaCl+Na2CO3)<混合盐(NaCl+Na2CO3+Na2SO4)<Na2CO3。An experiment has been conducted to investigate the germination characteristics of Prunellavulgaris seeds under different sodium salt stress treatments.P.vulgaris seeds were treated with five different types of sodium salt solution：NaCl,Na2CO3,Na2SO4,a mixture of NaCl and Na2CO3,and a mixture of NaCl,Na2CO3 and Na2SO4.The study investigated the effects of these treatments on germination rate,germination power,germination index,vigor index,the fresh weight of seeds,root length and seedling height.The results showed that with increasing salt concentrations the germination rate,germination index,vigor index,fresh weight,root length and seedling height of P.vulgaris seeds significantly decreased compared with the control.The indexes of P.vulgaris seed germination were promoted with lower concentrations and inhibited with higher concentrations of sodium salt.The indexes of the treatment with a low concentration rate were significantly higher than those of the control group.The order of seed germination restraint by the different sodium salt concentrations is：Na2SO4〈NaCl〈mixture of NaCl＋Na2CO3〈mixture of NaCl＋Na2CO3＋Na2SO4〈Na2CO3.

关 键 词：夏枯草 钠盐胁迫 种子萌发 发芽率 

分 类 号：S567.239[农业科学—中草药栽培]