不同甘蓝型油菜幼苗期对Ag^＋和Pb^2＋的耐性研究

Tolevance of Ag^+ and Pb^(2+) on the Seedling Stage of Different Brassica napus

采用室内培养方法,对9个甘蓝型油菜进行了重金属Ag+和Pb2+耐受梯度实验。结果表明,秦油7号、湘油15及2N43表现出较强的耐性。进一步实验证明甘蓝型油菜对重金属的耐受程度和MDA的含量呈现显著的负相关。此外,根中重金属的含量在耐受程度较强的秦油7号中的含量超过耐受程度较差的Jan-95。本研究可为今后筛选耐受重金属的油菜品种作出有益探索。

Soil contamination with heavy metals caused by industrial activities, have grown to a serious problem in many regions of the world. Selecting the plants with high tolerance to heavy metals has led to a surge of interest, recently. The experiments were conducted on the tolerance of nine cuhivars of B. napus by using different Ag^＋ and Pb^2＋ gradient. The results revealed that the relatively lower concentration of Ag^＋ and Pb^2＋ can increase the growth of root and hypocotyl,in which only the cuhivar of Qinyou 7, Xiangyou 15 and 2N43 exhibited relatively strong tolerance at high concentration of Ag^＋ and Pb^2＋. MDA content was negatively correlated with the heavy metal tolerance degree. In addition, the heavy metal content in the root of Qinyou 7 was obviously higher than that of Jan-95, indicating that Qinyou 7 had strong tolerance to Pb^2＋ than that of Jan-95. The experiment provided a basis for further screening B. napus cuhivar with special tolerant ability to heavy metal.