[Effect of phosphorus on copper tolerance in Achyranthes bidentata].
OBJECTIVE
To study the effect of phosphorus on copper tolerance in Achyranthes bidentata.


METHODS
A PVC pipe experiment was conducted to study the interactive effects of phosphorus (P) and copper (Cu), on growth, elemental accumulation and chemical constituents of A. bidentata. Two levels of elemental P were applied at 0 (P0) and 100 ( P100) mg x kg(-1) soil with 5 levels of Cu at 0 (Cu0), 100 (Cu100), 200 (Cu200), 200 (Cu400), 200 (Cu600) mg x kg(-1) soil, respectively.


CONCLUSIONS
The biomass production between different Cu treatments, phosphorus treatment showed significant differences. The biomass reached the maximum value as the concentration of Cu and P was 100 mg x kg(-1). Low concentration of Cu improved the growth of A. bidentata. The growth was blocked as Cu concentration reached 200 mg x kg(-1) in soil, however the contents of oleanolic acid and ecdysterone in roots of A. bidentata had not influenced by Cu. P could improved the copper tolerance in A. bidentata and increased root yield. The Cu concentration in soil of the cultivation bases must be below 200 mg x kg(-1) in order to produce good quality of medicinal material.
Zhengzhou College of Animal Husbandry Engineering, Zhengzhou 450011, China. wangxinmindr@sina.com.cn
Xinmin
X
Wang
Shilin
S
Chen
Zhihua
Z
Wei
Xiaolei
X
Jie
D029044:Achyranthes / Q000254:growth & development / Q000378:metabolism*; D018533:Biomass; D003300:Copper / Q000378:metabolism*; D010758:Phosphorus / Q000378:metabolism*; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D012989:Soil Pollutants / Q000378:metabolism*
D012989:Soil Pollutants; D010758:Phosphorus; D003300:Copper