镉胁迫下活性炭对小麦幼根的保护作用

The role of activated carbon in protecting the roots of wheat seedlings under cadmium stress

对镉处理下活性炭对小麦幼根的保护作用进行了研究。在小麦幼根的水培环境中加入镉导致了小麦幼根根长的降低、干重及鲜重的下降、细胞死亡水平上升和可溶性蛋白含量的增加。将小麦幼根置于加入活性炭的水培环境中并未对小麦幼根的根长、干重、鲜重、细胞死亡水平和可溶性蛋白的含量造成不良的影响,且在一定程度上促进了根的生长并降低了细胞的死亡水平。而在镉处理下加入活性炭则明显减缓了小麦幼根的根长的降低、干重及鲜重的下降、细胞死亡水平上升和可溶性蛋白含量的增加。上述观察表明,活性炭的加入对于镉和氯苯胁迫下小麦幼根具有一定的保护作用。

Aims： Our objectives were to reveal the role of activated carbon in protecting the roots of wheat（ Triticum aestivum L.） seedlings under Cd（ cadmium） stress. Methods： The roots of wheat seedlings were subjected to hydroponic conditions,and the length,dry weight,fresh weight,level of cell death,and soluble protein content of the roots were measured and compared under Cd stress in the presence of activated carbon. Important findings： Under Cd stress,the length,dry weight,and fresh weight of the roots of wheat seedling significantly decreased,while the level of cell death and content of soluble proteins of the roots significantly increased. These observations indicate that Cd stress causes obvious damages to the roots of wheat seedlings. Sole application of activated carbon had no negative effects on the length,dry weight,fresh weight,level of cell death,and content of soluble proteins of the roots of wheat seedlings. In addition,the application of activated carbon enhanced the growth of the roots and decreased the level of cell death of the roots to some extent. Further,the values of the length,dry weight,fresh weight,level of cell death,and content of soluble proteins of the roots under Cd stress were compared with those under Cd stress in the presence of activated carbon. The results revealed that the values of the length,dry weight,and fresh weight of the roots under Cd stress were significantly lower than those under Cd stress in the presence of activated carbon,while the level of cell death and content of soluble proteins of the roots under Cd stress were significantly higher than those under Cd stress in the presence of activated carbon. These results indicate thatapplication of activated carbon can protect the roots of wheat seedlings against Cd stress.