Effect of Exogenous Low-molecular-weight Organic Acids on the Seed Germination and Seedling Antioxidant Properties of Cunninghamia lanceolata
In order to investigate the effect of low molecular organic acids on the natural regeneration of Cunninghamia lanceolata seed,an indoor simulated experiment was conducted.The low molecular organic acids(oxalic acid,malonic acid,malic acid and citric acid) that were selected by the research group in the previous study and its mixed acid solution with different concentrations were used to treat the Cunninghamia lanceolata seed and to explore their impacts on the seed germination,seedling growth and antioxidant properties.The results showed that low concentration(0.5-5 mmol/L) of exogenous low molecular organic acids could promote the seed germination and seedling growth,high concentration(≥ 50mmol/L inhibited the seed germination and seedling growth of Cunninghamia lanceolata,and had serious harm to Cunninghamia lanceolata seedlings.In series treatments,the highest germination rate and germination potential of Cunninghamia lanceolata were 79.0% and 35.5%,respectively,in the 50 mmol/L mixed acid treatment,increased by 59.6% and 163%, compared with the contrast,respectively,and also had the strongest effect on promoting seedling growth.Overall,compared with the single organic acid,the mixed acid was more favorable to the seed germination and seedling growth of Cunninghamia lanceolata,and the damage degree to the seedling was the lowest.
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维普
