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为了明确不同品种亚麻种子对镉胁迫反应的差异,2014年以来自不同地区的10个纤用和油用亚麻主栽品种为材料,研究了不同程度镉胁迫对种子萌发的相对发芽势、相对发芽率、相对芽长、发芽指数和活力指数的影响,并对供试品种耐镉性进行了综合评价。结果表明,500μM以下的镉胁迫对亚麻种子发芽的影响较小,且对部分亚麻品种的发芽有促进作用;500μM以上随着镉浓度的升高,10个亚麻品种的种子萌发性能均有不同程度的下降;芽长受镉胁迫的影响较发芽势和发芽率更大。耐镉性综合评价表明晋亚9号对镉胁迫的耐性最强,派克斯耐性最弱。本研究可为亚麻品种耐镉性筛选和耐镉育种提供理论参考,筛选出的强耐镉性亚麻品种可作为不同地区镉污染农田的候选替代种植作物。
In order to clarify the differences of response to cadmium stress in different varieties of flaxseed, 10 varieties of main oil and flaxseed from different regions were used as materials to study the relative germination potential of germinated seeds with different degrees of cadmium stress, relative germination Rate, relative bud length, germination index and vitality index, and carried out a comprehensive evaluation on the cadmium tolerance of tested cultivars. The results showed that under the stress of 500μM, the seed germination of flax was less affected by cadmium stress and promoted the germination of some flax varieties. With the increase of cadmium concentration above 500μM, the seed germination of 10 flax varieties had different degrees of germination The bud length was more affected by cadmium stress than the germination potential and germination rate. Cadmium comprehensive evaluation showed that Jinya 9 was the strongest tolerant to cadmium stress, and the weakest was Pax resistance. This study can provide a theoretical reference for the selection of cadmium tolerant flaxseeds and cadmium tolerant breeding. The screened strong cadmium tolerant flaxseed can be used as a candidate alternative crop for cadmium contaminated farmland in different regions.