Abstract:
In this paper we observed the evolution of opium poppy plants,
Papaver somniferum L., in greenhouse conditions, after the foliar treatment
with growth regulators. Plant growth regulators are chemical substances
that are designed to affect plant growth and/or development.
The growth regulators we used are: 2 chloro, 4 amino-sulphonic
phenoxy acetic acid, sodium salt (BCO-2), 2 chloro, 2 amino-sulphonic
phenoxy acetic acid, sodium salt (BCO-4) and 2, 4 dichlorophenoxy – acetic
acid (2,4-D). All substances were used in two concentrations: 25 ppm and 50
ppm.
The 2 chloro, 4 amino-sulphonic phenoxy acetic acid, sodium salt and
4 chloro, 2 amino-sulphonic phenoxy acetic acid, sodium salt are growth
stimulators and the 2, 4 dichlorophenoxy – acetic acid is a growth inhibitor.
The 2,4 dichlorophenoxy – acetic acid is used as a herbicide affecting the
dicotyledonous plants, increasing the rate of DNA, RNA and protein
synthesis and impeding thus an outbalanced, controlled growth. The
treatments were made on opium poppy plants, in different vegetation phases.
After the treatment we made the biometrical measurements of plants’ height
at three, five and seven weeks from rising.
A very significant effect had the treatment with BCO-2, at 50 ppm
concentration for all vegetation stages and the variant with 2,4 D at 50 ppm
concentration. A significant effect had also the treatment with BCO-4 and
BCO-2 in a concentration of 25 ppm.
