NaCl胁迫对3种草地早熟禾种子萌发特性的影响

Effects of NaCl Stress on Germination Characteristics of Three Kinds of Poa pratensis Seeds

用室内模拟的方法,对"午夜""新歌来德""抢手股"3种草地早熟禾种子进行4种不同浓度(0、1、1.5、2mmol·L-1)的NaCl溶液盐胁迫试验,结果表明:盐浓度越高,植物受到的盐胁迫越大;3种早熟禾种子中,发芽率、胚根长度和胚芽长度最高的均为午夜种子,最低的为抢手股种子。午夜种子的综合能力较强,最适合应用于抗盐碱土地中,新歌来德次之,而抢手股不适合种植在盐碱地中。

Experiments of salt stress with four different concentrations of NaCl solutions (0 ,1 ,1 .5 ,2 mmol ▌L -1 ) on Poa pratensis‘Wuye’ ,P .pratensis‘Xingelaide’ ,P .pratensis‘Qiangshougu’were conducted by using indoor simulation method .Results showed that :the higher salt concentration ,the greater the plant received salt stress;a‐mong the three kinds of Poa p ratensis seeds ,germination rate ,length of radicle and germ of P .p ratensis‘Wuye’are all the maximum ;germination rate ,length of radicle and germ of P .p ratensis‘Qiangshougu’ seeds are all the low‐est .Seeds for P .pratensis‘Wuye’ ,which have the stronger comprehensive ability ,are the most suitable for saline‐alkali land ,followed by P .pratensis‘Xingelaide’ ;P .pratensis‘Qiangshougu’ is not suitable for cultivation in sa‐line‐alkali soil .