Published in Scientific Papers. Series A. Agronomy, Vol. LXVI, Issue 2
Written by Andreea TICAN, Mihaela CIOLOCA, Monica POPA
The main objective of this experience was monitoring the effect of plant growth regulators and their combinations on potato plantlets development, respectively on the following parameters: plantlets height, leaves number, root length, weight of fresh plantlet and of root. Thus, during in vitro multiplication process, two auxins were tested: naphthalene acetic acid (NAA) and indolyl acetic acid (IAA) (in two concentrations 0.05% and 0.1%, for both auxins), together with a gibberellin: gibberellic acid (GA3) (0.02%) and in vitro behavior was observed for three potato varieties: Marvis, Castrum, Ervant under the influence of these growth hormones. The nutrient medium supplemented with IAA 0.05% determined plantlets obtaining with high height and with the highest value of fresh root weight. The culture medium containing 0.1% NAA was effective in forming the number of leaves, showing a positive influence. NAA 0.1% + 0.02% GA3 and IAA 0.05% + 0.02% GA3 combinations had a beneficial effect on root length and fresh plantlets weight.
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