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壳聚糖(Chitosan,CS)是一种天然高分子物质,通过壳聚糖应用于种子包衣,研究对水分胁迫条件下玉米种子萌发和幼苗生长的影响。结果表明,壳聚糖包衣处理明显提高玉米种子的发芽率、发芽指数及活力指数,中度水分胁迫下发芽率比对照高6.9%,达极显著差异;玉米幼苗变高,茎粗和根长增加,根冠比极显著提高;降低玉米幼苗叶片的脯氨酸和丙二醛含量,提高叶绿素含量以及超氧化物歧化酶活性,有利于增强玉米幼苗的抗旱能力。
Chitosan (CS) is a kind of natural macromolecule material. Through the application of chitosan to seed coating, the effects of water stress on the seed germination and seedling growth of maize were studied. The results showed that the chitosan coating significantly increased the germination rate, germination index and vigor index of maize seeds. Under moderate water stress, the germination rate was 6.9% higher than that of the control, reaching a very significant difference; the maize seedling became higher, the stem diameter and root Length and root-shoot ratio increased significantly. The content of proline and malondialdehyde, the content of chlorophyll and the activity of superoxide dismutase in the leaves of maize seedlings were decreased, which was in favor of enhancing drought resistance of maize seedlings.