盐胁迫对玉米种子萌发及其幼苗生长的影响

Effects of Salt Stress on Seed Germination and Seedling Growth of Maize

分别采用不同浓度的盐溶液对西玉三号和华田玉米2个不同玉米品种的种子进行盐胁迫处理,测定玉米的发芽势、发芽率、株高、鲜重、叶长、叶绿素含量及丙二醛含量,以探究两种玉米在一定盐环境中的生长状况及其耐盐性反应。实验结果表明:不同浓度盐胁迫对玉米发芽率、株高、鲜重、叶长、叶绿素含量、丙二醛含量均有不同程度的抑制作用,且两个玉米品种表现也各不相同。从各个指标来看,当盐浓度为30 mmol/L及以上时,两个品种与其对照处理相比较均表现出负生长效应,表明两个品种都不耐盐,但就两个品系而言,在相同浓度盐溶液的作用下,华田玉米生理指标盐害程度较西玉三号轻,表明西玉三号较华田玉米对盐胁迫更敏感。

Two kinds of maize seeds were treated by different salinity,and the effects of salt stress on seed germination and seedling growth of maize were studied.The results showed that,different salinity density had different inhibition effects on the germination rate,plant height,fresh weight,the length of leaf,chlorophyll content and MDA content,different maize had different response.From the indicators,when the salinity density was above30mmol/L,the both kinds of maize showed negative growth effect compared with the control,which suggested that the both kinds of maize were not resistant to salt,but under the same salinity concentration,the salt damage degree of Huatian corn was less than that of NO.3Xiyu,which showed NO.3Xiyu was more sensitive to salt stress.