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以华北驼绒藜(Ceratoides arborescens)种子为材料,采用超干燥和人工加速老化的方法处理种子,测定其发芽率、活力指数、抗氧化酶活性、自由基水平及其他指标,研究种子劣变的生理生化特性。结果表明:在一定含水量范围内,种子超干对种子活力没有不良影响,而且种子在老化条件下(45℃,2d)能显著地提高种子的抗老化能力。华北驼绒藜超干种子最适含水量为3.78%。超干种子经老化处理后抗氧化酶(过氧化氢酶、超氧化物歧化酶)仍保持较高的活性。超干种子老化处理后自由基水平升高,但超干种子在萌发前经回水处理对自由基有清除能力,从而使自由基水平下降。因此,适度超干可以使华北驼绒藜种子保持较高的活力,提高其耐贮藏性。
The seeds of Ceratoides arborescens were treated by ultra-drying and artificial accelerated aging, and their germination rate, vigor index, antioxidant enzyme activity, free radical levels and other indexes were measured to study the effect of seed deterioration physiology Biochemical characteristics. The results showed that under certain water content, the ultradry of seeds had no adverse effect on seed vigor, and the seeds could significantly improve the anti-aging ability of seeds under aging condition (45 ℃, 2d). The optimum moisture content of the extra-dry seeds of Ceratoides lanatus was 3.78%. Antioxidant enzymes (catalase, superoxide dismutase) of ultra-dried seeds remained high after aging treatment. The free radical level increased after the ultra-dried seeds were aged, but the ultra-dried seeds cleared the free radicals by the backwater treatment before germination, so that the free radical level decreased. Therefore, appropriate ultra-dry can make Celastrus elatiorrhiza seed to maintain a high vitality and improve its storage resistance.