RESPONSE OF MENTHA ARVENSIS TO GIBBERELLIC ACID UNDER INDUCTIVE AND NON-INDUCTIVE DAY-LENGTH CONDITIONS

Increasing concentrations of gibberellic acid (GA₃) increased the leaf area under long-day condition whereas shorter photoperiod caused a marked fall in the area of leaves, Shorter duration of illumination and milder concentrations of GA₃ failed to induce flowering in mint plants.
The values for number of inflorescence per plant were found to be rainsed with rising concentrations of GA₃. Number of stolen branches per plant was reduced under long-day condition and at all the concentrations of GA₃. Contrariwise, shorter duration of illumination stimulated the production of stolon branches.
The values for ascrobic acid content were more in the growing apex under the inductive day-length conditions and increased GA₃ concentrations.
The higher dose of gibberellic acid and longer day favoured more stimulation of essential oil content in the leaves.

Both GA₃ and day-length conditions bear a great significance in controlling the growth, reproduction and metabolism of plants.
This may be attributed to the synergistic effects of the inductive photoperiod and the GA₃ treatment.

V International Symposium on Medicinal, Aromatic and Spice Plants

O.K. Garg, A. Hemantaranjan

https://doi.org/10.17660/ActaHortic.1986.188.16