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以3年生的银杏幼树为实验材料,经过淹水处理后,测定不同时间银杏叶片内主要生化指标——丙二醛(M DA)、游离脯氨酸(PRO)、可溶性糖以及超氧化物歧化酶(SOD)含量的变化.结果表明:淹水后的前9天,银杏叶片丙二醛含量无明显变化,第10天,其M DA含量显著增加,达到18.7μm o l/g,比对照M DA含量(7.2μm o l/g)增加1倍多;淹水后第8天,银杏叶片游离脯氨酸(PRO)含量显著增高,达到101.4μg/g,为对照的2倍多;随着淹水时间的延长,银杏叶片可溶性糖的含量逐渐增加,第9天达到32.9 m g/g,随后维持在较高水平上;在淹水后前几天,SOD的活性增加较快,第5天,SOD活性达到最高值854.6 U/g,第6天开始下降,到第11天时,其活性为78.8 U/g,远远低于对照组.
The three-year-old ginkgo seedlings were used as experimental material. After flooding treatment, the main biochemical indexes, such as malondialdehyde (MDA), free proline (PRO), soluble sugar and superoxide The results showed that the contents of malondialdehyde in leaves of Ginkgo biloba leaves had no obvious changes in the first 9 days after flooding, and on the 10th day, the contents of M DA increased significantly to 18.7 μmol / g, The content of free proline (PRO) of Ginkgo biloba leaves increased significantly to 101.4 μg / g on the 8th day after flooding, which was more than twice as much as that of the control The content of soluble sugar in leaves of Ginkgo biloba increased gradually with the flooding time increasing to 32.9 mg / g on the 9th day, and then maintained at a relatively high level. The activities of SOD increased rapidly in the first few days after flooding, , SOD activity reached the highest value of 854.6 U / g, began to decline on the 6th day, the activity was 78.8 U / g on the 11th day, much lower than the control group.