Background
Hypericum perforatum is used as a
medicinal plant, mostly in
antidepressant treatment. With endogenous and exogenous dormancy, more studies about the
germination of the
seeds are necessary.
Aim:
To evaluate the effect of
temperature and of preparations of high dilutions on the
germination of
seeds of
Hypericum perforatum.
Methods Three
bioassays were carried out in
chambers of
germination, using a completely randomized
experimental design and in duplicate. In the first
bioassay, of
temperatures of 20, 25 and 30 ºC was evaluated, with 20 replicates and 50
seeds in each replicate. In the second, the effect of high dilutions (
Kali carbonicum,
Natrum muriaticum,
Phosphorus and
Silicea terra in 12cH) using 4 replicates with 50
seeds each. In the third,
Kali carbonicum was tested at 6, 12, 20, 30 cH with 50
seeds and 4 replicates. The percentage of
germination,
germination rate index (GRI), average
germination time (AGT) and
seedlings with
cotyledons. The data were analyzed through the R
software at a 5% significance. Results At the
temperature of 25 °C, 63% of the
seeds germinated while at the
temperatures of 20 and 30 °C the percentage was 26% and 18%, respectively. In
seeds treated with
Kali carbonicum 12cH the
germination rate increased significantly in relation to the
control group.
Kali carbonicum 6cH increased the GRI of the
seeds, while at 20cH, it increased the AGT, showing delay in
germination. Conclusion The use of the
Kali carbonicum assists in the breakage of dormancy and average
time of
germination in
Hypericum perforatum seeds. (AU)