0.3 mmol/L铅胁迫下小白菜（Brassica rapa var. chinensis）生长受到显著抑制，0.1 mmol/L水杨酸（salicylic acid）诱导处理能显著缓解0.3 mmol/L铅胁迫对小白菜幼苗生长的抑制；并且水杨酸对铅胁迫下小白菜的生长存在“低促高抑”效应，当水杨酸处理浓度达到1.5 mmol/L时，不但不能缓解铅对小白菜的毒害，反而加重毒害，这可能与高浓度水杨酸与铅形成的复合伤害有关。
The growth of pakchoi was significantly inhibited under the condition of 0.3 mmol/L Pb stress. The treatment 0.1 mmol/L salicylic acid (SA) could significantly alleviated the growth toxicity of pakchoi seedling under the 0.3 mmol/L Pb stress. The effect of SA treatment on the growth of pakchoi under Pb stress showed the ‘low to promote and high to suppress’. The treatment 1.5 mmol/L SA did not alleviate the toxicity but increased toxicity. This may be related to the compound injury formation of high concentrations of SA and Pb.
[1] Pueschel S M, et al. Lead poisoning in childrenhood[M]. Baltimore: Paul Brooks Publishing, 1996: 1-6.
[2] Nilsson U, et al. Kinetics of lead in bone and blood after end of occupational exposure[J]. Pharmacol Toxicol. 1991,68(6): 477-484.
[3] 王凯荣,等. 重金属污染对稻米品质影响的研究[J]. 农业环境保护, 1993,12(6): 254-257.
[4] 莫争,等. 重金属Cu、Pb、Cr、Cd在水稻植株中的富集与分布[J]. 环境化学, 2002,21(2): 110-116.
[5] 毛学文,等. 氯化铅对豌豆根尖细胞微核和异常分裂的作用[J]. 植物生理学通讯, 2001,37(5): 406-408.
[6] 陈振华,等. 铅污染对3个水稻品种种子活力的影响[J]. 中国水稻科学, 2005,19(3): 269-272.
[7] 赵雨云,等. 外源水杨酸对白菜种子铬毒害的缓解效应[J]. 中国种业, 2008,(8): 43-44.
[8] 李合生. 植物生理生化实验原理和技术[M]. 高等教育出版社, 2000: 164-169.
[9] Metwally A, et al. Salic acid alleviates the cadmium toxicity in barley seedlings[J]. Plant Physiol., 2003,132: 272-281.
[10] Shah K, et al. Dubey RS Effect of cadmium on lipid peroxidation, superoxide anion generation and activities of antioxidant enzymes in growing rice seedlings[J]. Plant Science, 2001,161: 1 135-1 144.
闽公网安备 35020602000789号