Effects of Eichhornia crassipes aqueous extracts on seed germination of Ottelia acuminata var. jingxiensis.
In order to study the effects of invasive species, Eichhornia crassipes, on the population maintenance and expansion of Ottelia acuminata var. jingxiensis, seeding germination O. acuminata var. jingxiensis was measured through aqueous extracts of different concentration from leaf, petiole, flower and root of E. crassipes acuminate. The results showed that all the aqueous extracts could accelerate the seed germination, and there were some differences in promoting effects. The germination rate increased with the concentration of aqueous extracts increased, while germination index increased gradually with the rise of the concentration of leaf and flower aqueous extracts, and the maximum appeared in 100 g/L, while the maximum appearing in 20 g/L in petiole and root aqueous extracts. Then it showed a downward trend with the increase of concentration, and the germination potential also presented the same trend as germination index. However, the aqueous extracts had a little different on the sensitive indexes of seed germination rate. Therefore, aqueous extracts of E. crassipes had no obvious stress on the seed germination in this experiment, on the contrary, there was a certain role in promoting.