The results showed that there was no significant difference in seed germination of all the tested plants among the treatments (Table 1A). However, Sanevas (2000) reported that the aqueous Hapalosiphon extract could inhibit seed germination of chinese cabbage. This might be because of differences in factors affecting seed germination. Germination is an important stage in the life cycle of plants, which enables the embryo to survive the period between seed maturation and seedling establishment. There are many factors influencing germination of seeds such as temperature, salinity, light and moisture (Koornneef et al., 2002;Gorai et al.,2011).