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试验以超级稻沈农9816和普通稻秋光为试材,采用盆栽方法,模拟砷污染农田,设置4种砷胁迫浓度,即0、20、40和60 mg kg-1。砷以Na3AsO4·12H2O形式加入。试验结果表明:当砷胁迫浓度达到40 mg kg-1以上时,超级稻硝酸还原酶活性、脯氨酸、可溶性蛋白含量显著高于普通稻(P<0.05);灌浆期超级稻根系利用可溶性糖进行渗透调节的能力比普通稻强;单株有效穗数的增加是超级稻高产的基础,在相同砷胁迫浓度下,超级稻的有效穗数分别是普通稻的121.90%、122.25%、139.05%和133.22%。
In this experiment, super rice Shennong 9816 and common rice Quguang were used as experimental materials. Potted plants were used to simulate arsenic pollution in farmland. Four concentrations of arsenic stress, 0, 20, 40 and 60 mg kg-1, were set up. Arsenic is added as Na3AsO412H2O. The results showed that the activities of nitrate reductase, proline and soluble protein in super rice were significantly higher than those in normal rice (P <0.05) when the concentration of arsenic was above 40 mg kg-1. The soluble sugar The effective panicle number of super rice was 121.90%, 122.25% and 139.05% of that of common rice, respectively. Under the same arsenic stress concentration, the effective panicle number of super rice was 121.90%, 122.25% and 139.05% And 133.22%.