盐碱胁迫对盐生植物种子萌发的影响

采用不同浓度的NaCl(中性盐)和Na2CO3(碱性盐)胁迫三种盐生植物盐地碱蓬、碱蓬和盐爪爪正在萌发的种子,以研究不同类型盐对种子萌发特性的影响.结果表明,随着两种盐浓度的升高,种子萌发率下降,萌发率与盐浓度间呈现显著的负相关关系;盐地碱蓬、碱蓬和盐爪爪种子萌发率与NaCl胁迫相关系数分别为0.9206、0.8989和0.8956,与Na2CO3胁迫相关系数分别为0.9148、0.7193和0.6327;蒸馏水中三种盐生植物种子萌发率最高,Na2CO3对种子萌发的抑制作用强于NaCl.

Effects of salinity and alkalinity on seed germination of halophytes

A study was carried out to determine the germination ability of seeds in three halophytes, which were treated with various concentrations of NaCl(neutral salt) and Na₂CO₃(basic salt). The result showed that seed germina-tion rate decreased as salinity increased and that negative correlation between the seeds germination percentage and salt concentration was marked. The related coefficient of Suaeda salsa, Suaeda glauca and Kalidium foliatum are 0.9206, 0.8989 and 0.8956 in neutral salt(NaCl), and 0.9148, 0.7193 and 0.6327 in basic salt(Na₂CO₃). The optimal ger-mination of the seeds of three halophytes was obtained in distilled water. The inhibitory effect of Na₂CO₃ on seed germina-tion was stronger than that of NaCl.