铅、铜和镉胁迫对夏枯草生长及内在品质的影响
[Effects of lead, copper and cadmium stresses on growth and inherent quality of Prunalla vulgaris].
作者信息
Wu Zheng, Guo Qiaosheng, Wang Qingya, Zhou Lijun, Zhang Zhiyuan, Zhang Lixia, Huang Tao
机构信息
Insititute of Chinese Medicinal Materials, Nanjing Agricultural University, Najing 210095, China.
出版信息
Zhongguo Zhong Yao Za Zhi. 2010 Feb;35(3):263-7. doi: 10.4268/cjcmm20100301.
OBJECTIVE
Prunalla vulgaris was used as the experimental material to study the effects of lead (Pb), copper (Cu) and cadmium (Cd) on the related physiological and growth indexes of the plant.
METHOD
By referencing the GAP and the soil environmental quality standard, the growth and inherent quality of the plant were observed under different concentrations of the heavy metals stresses. The data were statistically processed.
RESULT
The results showed that the plant grew normally when the heavy metal concentrations in soil were close to up limits of the soil environmental quality standard II. The content of heavy metal in spica met the requirement of the standard, and under the circumstances the content of ursolic acid was increased in a certain range. The critical values of Pb, Cu, Cd in the P. vulgaris grown soil were set at 450, 100, 1.0 mg x kg(-1), respectively.
CONCLUSION
The harmful influence of the heavy metal stress at a lower concentration is lighter than at a higher concentration, and it could increase the content of ursolic acid. The stress of Pb, Cu and Cd is more obvious than that of Zn.
目的
以夏枯草为实验材料，研究铅（Pb）、铜（Cu）和镉（Cd）对该植物相关生理及生长指标的影响。
方法
参照中药材生产质量管理规范（GAP）及土壤环境质量标准，观察不同浓度重金属胁迫下该植物的生长及内在品质情况，并对数据进行统计处理。
结果
结果表明，当土壤中重金属浓度接近土壤环境质量标准二级上限时，该植物生长正常，穗中重金属含量符合标准要求，且在此情况下熊果酸含量在一定范围内有所增加。夏枯草生长土壤中Pb、Cu、Cd的临界值分别设定为450、100、1.0 mg·kg⁻¹。
结论
较低浓度的重金属胁迫危害影响比高浓度时轻，且能增加熊果酸含量。Pb、Cu和Cd的胁迫比Zn的胁迫更明显。
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