Abstract                 Volume:6  Issue-2  Year-2019          Original Research Articles

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Effect of indole-3-butyric acid application type and concentration on rooting efficacy in three endemic rare-endangered Dianthus species with conservation priority
Virginia Sarropoulou* and Eleni Maloupa
Hellenic Agricultural Organization (HAO) – DEMETER, Institute of Plant Breeding and Genetic Resources,Laboratory of Protection and Evaluation of Native and Floricultural Species, Balkan Botanic Garden of Kroussia,P.C. 570 01 Thermi, Thessaloniki, P.O. Box 60458, Greece
*Corresponding author
Abstract:

Efficient propagation of uniform starting material is a critical requirement for mass production of most ornamental plants. Conservation and protection of rare-threatened plants and sustainable exploitation of biodiversity can be achieved through ex situ conservation actions. Therefore, propagation experiments were carried out on three endemic Caryophyllaceae species with limited spread and conservation priority: Dianthus ingoldbyi, Dianthus juniperinus subsp. bauhinorum and Dianthus fruticosus subsp. occidentalis. Softwood top cuttings were used in the middle of winter for D. fruticosus (6-7 cm) and D. juniperinus (5-6 cm) and in early spring for D. ingoldbyi (4-5 cm). The base of cuttings was immersed for 1 min in solutions of four IBA concentrations (0, 1000, 2000 and 4000 ppm) and also dusted with 0.066% and 0.2% IBA (in powder form). The cuttings were placed in a peat: perlite (1:3) substrate on a heated greenhouse mist. The most appropriate treatment for D. ingoldbyi (7 weeks) was 2000 ppm IBA (15.07 roots3.06 cm long, 100% rooting). In D. juniperinus, 1000 ppm IBA gave the highest rooting (57.14%) with 39.75 roots 7.49 cm long (8 weeks). Rooting of D. fruticosus was more effective (45.33 roots 5.85 cm long, 28.57% rooting) with 1000 ppm IBA (8 weeks).

Keywords: Asexual propagation Auxins Cuttings Greek Flora Rooting Wild Carnations
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How to cite this article:

Sarropoulou, V., Maloupa, E., 2019. Effect of indole-3-butyric acid application type and concentration on rooting efficacy in three endemic rare-endangered Dianthus species with conservation priority.Int.J.Curr.Res.Biosci.Plantbiol. 6(2): 1-10. doi: https://doi.org/10.20546/ijcrbp.2019.602.001