光照、盐分和埋深对无芒隐子草和条叶车前种子萌发的影响

Effects of light,salinity and sowing depth on seed germination of Cleistogenes songorica and Plantago lessingii

光照、盐分和埋深对无芒隐子草(Cleistogenes songorica)和条叶车前(Plantago lessingii)种子萌发的影响研究结果显示,无芒隐子草和条叶车前种子为萌发需光性种子。随着盐(NaCl)浓度的增加,2种植物种子的发芽率呈直线下降趋势(P<0.01),但以条叶车前下降较为缓慢。当盐分浓度为0.4 mol.L-1时,2种植物种子皆不能萌发。低浓度的盐分促进胚根的生长,高浓度则表现为抑制作用;盐分对胚芽的生长则一直起抑制作用。2种植物种子发芽率随埋深的增加而减小,当埋深>2 cm时不能萌发。

Cleistogenes songorica and Plantago lessingii are the important native plant species in desert grasslands of northwest China,and play a significant role in pasture production and vegetation restoration.The study on the seed germination characteristics of C.songorica and P.lessingii under different light,salinity and sowing depth showed that C.songorica and P.lessingii seeds had a higher germination rate when fostered in light than in dark.The germination rate declined linearly with increasing NaCl concentra...