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为了研究不同浓度盐胁迫对无芒雀麦种子萌发和早期生长的影响,试验采用培养皿纸上发芽法,对10种无芒雀麦(Bromus inermis Leyss.)种子进行0(对照)、50 mmol/L、100 mmol/L、150 mmol/L和200 mmol/LNaCl溶液胁迫种子萌发试验,测定了种子发芽率、相对发芽率、发芽速度、复萌率、总发芽率、胚芽及胚根长度等。结果表明:与对照相比,低浓度盐胁迫(50 mmol/L)促进ZXY3310无芒雀麦种子萌发;其余品种种子发芽率及发芽速度随着Na Cl溶液浓度的增大呈现不同程度的减缓。解除盐胁迫后,种子开始迅速萌发。早期幼苗胚芽和胚根长也随着盐胁迫浓度的增大而降低,但品种间存在差异。低浓度(50 mmol/L)与对照发芽时间相同,其他随着胁迫的浓度增大,种子萌发时间推迟,浓度越高推迟时间越长,并且延长了萌发的进程。
In order to study the effects of salt stress on seed germination and early growth of Bromus inermis, the effects of salt stress on seed germination and early growth of Bromus inermis were studied. The results showed that 0 (control), 50 mmol / L, 100 mmol / L, 150 mmol / L and 200 mmol / L NaCl solution. The germination rate, relative germination rate, germination rate, rate of relapse, total germination rate, germ and radicle length . The results showed that low concentration salt stress (50 mmol / L) promoted the seed germination of ZXY3310. Compared with the control, the seed germination rate and germination rate of other varieties decreased with the increase of NaCl concentration. After relieving salt stress, the seeds began to germinate rapidly. The germination and radicle length of early seedling also decreased with the increase of salt stress concentration, but there were differences among varieties. Low concentration (50 mmol / L) germinated at the same time as the control. Others increased the seed germination time as the concentration of stress increased. The higher the concentration, the longer the delaying time and prolonged the germination process.