[Effects of heavy metal on Astragalus membranaceus seeds germination and physiological target].
OBJECTIVE
To study the effects of heavy metals on germination and antioxidant systems of the seeds of Astragalus membranaceus.


METHODS
The seeds were treated with three different heavy metals (Cu, Pb, Cd) and the germination rate, germination energy, germination index, seedling root length, seedling fresh weight, soluble protein, antioxidant enzyme systems, electrical conductivity were detected and analyzed.


RESULTS
The results indicated that all of the three kinds of heavy metals had a significant effect on the seed germination index at different levels of concentrations except germinating ability. Different kinds of heavy metals could also enhance the vitality of POD and CAT, increase the electrical conductivity and the concentration of soluble protein.


CONCLUSIONS
It can be concluded that heavy metals have a significant effect on the growth and antioxidant system of the seed.
Yang
Guang
G
Institute of Chinese Materia Medica, Academy of Traditional Chinese Medicine, Beijing 100700, China.
Qian
Dan
D
Guo
Lanpin
L
Chen
Min
M
Huang
Luqi
L
Han
Xiaoli
X
Zhou
Jie
J
D000975:Antioxidants / Q000032:analysis / Q000378:metabolism; D027885:Astragalus propinquus / Q000737:chemistry / Q000187:drug effects / Q000201:enzymology / Q000502:physiology*; D018525:Germination / Q000187:drug effects*; D019216:Metals, Heavy / Q000494:pharmacology*; D010940:Plant Proteins / Q000378:metabolism; D012639:Seeds / Q000737:chemistry / Q000187:drug effects / Q000201:enzymology / Q000502:physiology
D000975:Antioxidants; D019216:Metals, Heavy; D010940:Plant Proteins