9份番茄材料种子萌发期耐盐碱性评价

Evaluation of Saline-alkaline Tolerance of 9 TomatoMaterials During Seed Germination

采用4种盐(NaCl、Na_(2)SO_(4)、NaHCO_(3)和Na_(2)CO_(3))按照1∶9∶9∶1摩尔比混合配置成6个不同浓度的盐碱溶液,研究不同盐碱浓度水平对9份番茄材料种子萌发和芽苗生长的影响,并运用主成分分析法结合隶属函数法对种子萌发期的耐盐碱能力进行综合评价。结果表明,随着盐碱胁迫浓度的升高,所有番茄材料的种子发芽势、发芽率、胚芽长、胚根长和活力指数均呈逐渐下降的趋势,但不同材料降低幅度不同。35 mmol/L的盐碱浓度能较好地反映番茄材料间的耐盐碱性差异。9份番茄耐盐碱性依次为新盐3号>新盐6号>新盐9号>新盐4号>新盐7号>新盐5号>新盐2号>新盐8号>新盐1号。

Four kinds of salt(NaCl,Na_(2)SO_(4),NaHCO_(3)and Na_(2)CO_(3))were mixed into 6 salt and alkali solutions with different concentrations according to the molar ratio of 1∶9∶9∶1.The effects of different salt and alkali concentrations on seed germination and sprout growth of 9 tomato materials were studied,and the ability of saline-alkali resistance was evaluated comprehensively at seed germination stage by principal component analysis and membership function method.The results showed that the seed germination potential,germination rate,germ length,radicle length and vigor index of all tomato materials decreased gradually with the increase of salt and alkali stress concentration,but the decreasing amplitude of different materials was different.The salt and alkali concentration of 35 mmol/L could reflect the difference of salt and alkali tolerance among tomato materials.The salt and alkali tolerance of 9 tomatoes was Xinyan 3>Xinyan 6>Xinyan 9>Xinyan 4>Xinyan 7>Xinyan 5>Xinyan 2>Xinyan 8>Xinyan 1.