外源Ca2+对盐胁迫下玉米萌发与幼苗生长的影响

分别用NaC1和不同浓度的Ca(NO3)2+ NaC1溶液处理玉米种子及幼苗，然后测定幼苗的生理指标和形态指标，研究外源Ca2+对盐胁迫下玉米萌发和生长的影响。结果表明：NaC1胁迫抑制了玉米的萌发和生长， 使玉米幼苗中的可溶蛋白质含量和叶绿素含量分别降低了39.43%和21.97%，MDA含量升高了62.05%。当添加不同浓度的外源Ca2+后，玉米幼苗中的可溶蛋白质含量和叶绿素含量均有所增加，MDA含量下降，明显缓解了盐胁迫。当外源Ca2+的浓度为20mmol/L时，缓解作用达到最佳。

Effect of Calcium on Germination and Seedling Growth of Maize under Salt Stress

Maize seeds and seedlings were treated with NaC1 and different concentrations of Ca（NO3）2＋ NaC1, Then the physiological characters and morphological traits of seedling were analyzed to study the effects of calcium on the germination and seedling growth of maize. The results showed that NaC1 stress inhibited the germination and growth of maize, the soluble protein content and chlorophyll content of maize seedlings were decreased by 39.43% and 21.97%, MDA content was increased by 62.05%. The soluble protein content and chlorophyll content of maize seedlings were increased, and MDA content was decreased when adding different concentrations of Ca（NO3）2, so salt injury was significantly alleviated. When the concentration of Ca（NO3）2 was 20mmol/L, the mitigation to achieve the best.