钙浸种对盐胁迫下鸡冠花种子萌发的影响

Effects of Soaking Seeds in Calcium Liquid on the Germination of Cockscomb Flower Seeds under Salt Stress

研究CaCl2浸种处理对NaCl胁迫下鸡冠花种子萌发的缓解效应。结果表明,NaCl胁迫抑制了鸡冠花的萌发和生长,NaCl浓度高于100mmol/L时,抑制作用显著加强;较低浓度的CaCl2浸种能缓解鸡冠花种子受到的盐胁迫伤害,而浓度过高,缓解作用减弱甚至消失;试验中CaCl2以80mmol/L的浸种效果最好,在各种浓度盐胁迫下,均能提高种子的发芽率、发芽指数、活力指数,促进胚轴和胚根的生长。适宜浓度的CaCl2浸种能够缓解盐胁迫对鸡冠花种子萌发和生长的抑制作用。

The alleviatory effects of soaking in calcium liquid on cockscomb seeds germination were investigated under NaCl stress.The results showed that NaCl stress repressed the germination and growth of cockscomb,the significant restraining effect was shown when NaCl concentration was up to 100mmol/L;Taking experiments of soaking in CaCl2 under salt stress,the toxic effect of salt as alleviated under lower concentration of CaCl2,the alleviatory effects were weakened or disappeared under high level CaCl2.The effect of 80mmol/L CaCl2 was best,under each kind of concentration salt stress,the germination rate,germination index,vigor index,radicle length and hypocotyl length were increased in this concentration of CaCl2.The proper supplementary CaCl2 can alleviate inhibitory effect of salt stress and improve seeds germination and seedling growth of cockscomb flower.