[Effects of lead, copper and cadmium stresses on growth and inherent quality of Prunalla vulgaris].
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.


METHODS
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.


RESULTS
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.


CONCLUSIONS
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.
Wu
Zheng
Z
Insititute of Chinese Medicinal Materials, Nanjing Agricultural University, Najing 210095, China.
Guo
Qiaosheng
Q
Wang
Qingya
Q
Zhou
Lijun
L
Zhang
Zhiyuan
Z
Zhang
Lixia
L
Huang
Tao
T
D002104:Cadmium / Q000633:toxicity*; D003300:Copper / Q000633:toxicity*; D019686:Lamiaceae / Q000187:drug effects* / Q000254:growth & development* / Q000502:physiology; D007854:Lead / Q000633:toxicity*; D010946:Plants, Medicinal / Q000187:drug effects* / Q000254:growth & development* / Q000502:physiology
D002104:Cadmium; D007854:Lead; D003300:Copper