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[目的]为实际生产中缓解油葵盐害提供理论和技术依据。[方法]以油葵种子为试验材料,在种子萌发过程中选用120 mmol/L Na Cl盐胁迫和0~200 mg/L Vc溶液进行处理,研究外源Vc对盐胁迫下油葵种子萌发指标和幼苗生理特性的影响。[结果]在盐胁迫下,随着Vc溶液浓度的增加,油葵种子发芽势和发芽率、幼苗超氧化物岐化酶(SOD)和过氧化物酶(POD)活性、脯氨酸(Pro)含量均呈现先升高后降低的趋势,分别以80、120、80mg/L的Vc处理达到最大值;幼苗丙二醛(MDA)含量呈现先降后升的趋势,以160 mg/L Vc处理达到最小值。[结论]Vc能不同程度地提高盐胁迫条件下油葵种子的发芽率、发芽势,促进幼苗生长,缓解盐胁迫对油葵种子萌发和幼苗生长的危害。
[Objective] The research aimed to provide theoretical and technical basis for alleviating salt damage of oil sunflower in actual production. [Method] The oil sunflower seeds were used as test material, 120 mmol / L NaCl salt solution and 0-200 mg / L Vc solution were used for the treatment of seed germination. The effects of exogenous Vc on the seed germination index of sunflower And the physiological characteristics of seedlings. [Result] Under salt stress, the seed germination energy and germination rate, the activity of superoxide dismutase (SOD) and peroxidase (POD), the content of proline (Pro ) Increased firstly and then decreased, reaching the maximum at 80, 120 and 80 mg / L Vc respectively. The content of malondialdehyde (MDA) Process to reach the minimum. [Conclusion] Vc could enhance the germination rate and germination energy of oil sunflower seeds under different salt stress to promote seedling growth and alleviate the harm of salt stress to oil sunflower seed germination and seedling growth.