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试验选择内蒙古推广种植的10个马铃薯品种,采用防雨棚盆栽设计进行水分胁迫处理,测定产量和植株叶片脯氨酸、丙二醛含量、根系的α-萘胺氧化力3项生化指标,分析不同品种处理的变化程度,并结合产量测定的抗旱系数,分析品种的抗旱能力。结果表明,‘蒙薯13’、‘蒙薯12’和‘蒙薯19’抗旱性最强,‘费乌瑞它’、‘蒙薯21’、‘蒙薯10’和‘大西洋’抗旱性中等,‘蒙薯14’、‘蒙薯20’和‘内薯7号’抗旱性最弱。水分胁迫处理与对照相比,叶片脯氨酸和丙二醛含量表现升高趋势,根系的α-萘胺氧化力表现降低趋势,且这3项指标与抗旱系数的相关性均达到了显著水平,在马铃薯品种的抗旱性评价中起到了重要的作用,均可作为马铃薯抗旱性评价的指标。
Ten potato varieties popularized and popularized in Inner Mongolia were selected for experiment. Water-stress treatment was carried out in potted shelter design to measure the yield, the content of proline and malondialdehyde in leaves and the biochemical indexes of α-naphthylamine oxidation in roots. Different varieties of changes in the degree of treatment, combined with the determination of drought-resistant coefficient of production, analysis of drought resistance of varieties. The results showed that ’Mengshuang 13’, ’Mengshu 12’ and ’Mengshu 19’ had the strongest drought resistance, moderate drought resistance such as ’Feiurui it’, ’Mengshu 21’, ’Mengshu 10’ and ’Atlantic’ , ’Mengshu 14’, ’Mengshu 20’ and ’Inner potato 7’ had the weakest drought resistance. Compared with the control, the contents of proline and malondialdehyde in leaves increased and the oxidative stress of α-naphthylamine decreased, and the correlation between the three indexes and drought resistance coefficient reached the significant level , Played an important role in the evaluation of drought resistance of potato varieties and could be used as an index to evaluate the drought resistance of potato.