Abstract:
The effects of the plant growth promoter gibberelli
c acid (GA
3
) and plant growth
retardant chlormequat chloride (CCC) on biomass and
quality of
Angelica dahurica
var.
formosana plants were investigated employing physio
logical and biochemical methods.
Plants were sprayed with GA
3
or CCC at rosette stage and coumarin content was
analyzed by high performance liquid chromatography
(HPLC) after harvest. Two
coumarins in root were detected: isoimperatorin and
imperatorin. The root content of
imperatorin was not affected by application either
GA
3
or CCC, while isoimperatorin was
increased to 127% after treatment with CCC (400 mg
L
-1
). The lowest concentrations of
GA
3
(50 mg L
-1
) and CCC (400 mg L
-1
) increased root yield to 157 and 139%, respectivel
y.
We note here that GA
3
and CCC might be used in improving the yield of
A
.
dahurica
var.
formosana
and
maintaining the coumarin content.
Keywords:
Angelica dahurica
var. formosana, Plant growth promoter, Biomass, Cou
marin
content.
