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Original Articles Open Access
In this study, the laboratory bioassay and matrix pot experiment were conducted with the deionized water as the controls (CK), for the goal of studying on the impact of ginseng root extraction solution at low concentration(10g/mL), medium concentration(20g/mL) and high concentration(40g/mL) on parameters of rice seed, including the germination, biomass of the seedlings, root activity, the conductivity and net photosynthetic rate. Results presented that: compared with the control group, after the treatment with ginseng root extraction solutions of different mass concentrations, the germination rate, seedling height and biomass of the seedlings of rice seeds were improved to different degrees. Among them, with the rise of mass concentration of extracts, the germination rate of rice seeds gradually increased. Treatment groups of medium and high mass concentration presented significant differences from that of CK (PÃ¯Â¼Â0.05). When the mass concentration of root soil extracts was 40g/mL, the fresh weight and dry weight of a single plant was the largest, as 14.22mg and 1.66mg respectively. Extracts of different mass concentration did not impose an obvious impact on the seedling height, yet greatly inhibiting the seedling growth. Extracts of low mass concentration remarkably improved the root activity, while extracts of high mass concentration reduced the root activity; extracts of different mass concentrations significantly lowered the absolute conductivity of rice leaves; net photosynthetic rate of leaves after the treatment with extracts of low and medium mass concentration was increased. Meanwhile, extracts of high mass concentration slightly inhibited the net photosynthetic rate of leaves. Thus, it can be concluded that ginseng root extraction solution plays a certain role of promotion in the early germination and growth of rice, and presented the dose-related response as promoting at low concentrations and inhibiting at high concentrations for root activity and net photosynthetic rate.
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Author(s): Yujia Song and Huiqing Liu
Rice, ginseng, seed, Allelopathic effect, allelopathic