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采用NaCl和Na2SO4溶液进行渗透胁迫,研究新疆大果沙枣种子萌发和幼苗叶片部分生理指标的变化。结果表明:低浓度(501、00 mmol/L)NaCl和Na2SO4溶液提高了其发芽率和发芽指数,随后发芽率降低,其中300mmol/L的盐处理时发芽率分别54.98%和51.72%;与对照比较,低浓度盐处理时幼苗叶片膜透性、超氧化物歧化酶活性、过氧化物酶活性、过氧化氢酶活性、丙二醛含量变化不明显,只是在处理浓度高时,其值随着浓度升高而变大;处理浓度在50~150 mmol/L时,渗透调节物质脯氨酸含量无明显变化,处理浓度高于200 mmol/L时,含量则大量增加,分别是对照的12.23和13.66倍。综合表明:低浓度的盐处理促进新疆大果沙枣发芽和生长,并且影响其发芽率盐浓度存在一个阈值(300 mmol/L),含盐量低于该阈值宜于其发芽和生长。
The osmotic stress of NaCl and Na2SO4 solution was used to study the changes of seed germination and physiological index of seedling leaves. The results showed that the germination rate and germination index of low concentration (501, 00 mmol / L) NaCl and Na2SO4 solution were increased, then the germination rate was decreased. The germination rate of the treatment with 300 mmol / L salt was 54.98% and 51.72% In comparison, the membrane permeability, superoxide dismutase activity, peroxidase activity, catalase activity and malondialdehyde content of seedling leaves did not change obviously with low concentration of salt treatment, but the value of The content of proline in osmotic adjustment substance did not change obviously when the concentration was 50-150 mmol / L, while it increased when the concentration was higher than 200 mmol / L, which was 12.23 And 13.66 times. The results showed that low salt treatment promoted the germination and growth of A. jujube and affected its germination rate with a threshold (300 mmol / L). When the salinity was lower than this threshold, it was suitable for its germination and growth.