In Vitro Regeneration of Ornamental Crocus (Crocus vernus L.) by Using Plant Growth Regulators

Parvin, Sara; Daneshvar, Mohammad Hosein; Lotfi Jalal- Abadi, Amin

doi:10.22055/ppd.2019.25898.1603

Document Type : Research Paper

Authors

¹ M.Sc. Graduate of Horticulture, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran

² Professor, Department of Horticulture, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran

³ Assistant Professor, Department of Plant Production and Genetics, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran

https://doi.org/10.22055/ppd.2019.25898.1603

Abstract

Abstract

Background and Objectives
Crocus flower, which belongs to Iridaceae family, is one of the most important ornamental bulbous plants. The propagation of Crocus vernus L. by corm is not commercially affordable due to transmission of fungal and bacterial diseases as well as the long dormancy period which takes 4 to 5 months. Thus, in vitro culture of Crocus vernus is a suitable solution for commercial reproduction. Plant tissue culture technique would be a better alternative for improving quality and production.

Materials and Methods
In order to micropropagate ornamental saffron, the effect of different culture media on direct organogenesis experiment was conducted in factorial arrangement in a completely randomized design with 3 replications in the tissue culture lab of the Department of Horticulture at Agricultural Sciences and Natural Resources University of Khuzestan from 2015 to 2016. The explants used in this experiment were latheral and terminal buds which were evaluated in 10 hormons treatments and control in the Murashige and Skoog medium (MS). To eliminate surface contamination, the explants were first immersed under water for 30 minutes after placing the corms. Next, they were placed in high temperature Benlate fungicide solution (55° C) for 30 minutes. Then, they were put in 70% ethanol (ethyl alcohol) for 30 seconds and 15% Sodium hypochlorite solution for 6 minutes. The explants were finally washed three times with sterile distilled water under the air flow bench. The effects of plant growth regulators including BAP (0.5, 1.0, 2.0 mg/l), TDZ (0.5, 0.75, 1.0 mg/l), Kin (0.5, 1.0, 2.0 mg/l) and 0.1mg/l IBA in direct regeneration were investigated.

Results
The results showed that the kind of plant growth regulators (PGR) and the explant type are very important in regeneration of Crocus vernus so that we can not secure any shoots without PGR. In direct organogenesis experiment, the maximum number of multiple shoots (15.84) was obtained from apical bud explant in MS medium supplemented with 5/0 mg/l TDZ along with 5/0 mg/l BAP, 5/0 mg/l KIN and 1/0 mg/l IBA, after 10 weeks, that had a significant difference with other treatments at 1% Duncan test. We observed 2.o mg/l BAP along with 1/0 mg/l IBA had the greatest effect on the number of corms.

Discussion
The results showed the shoot regeneration is controlled by the ratio of cytokinin with auxin. It should be mentioned that cytokinin plays a role in the synthesis of RNA, stimulation of the production of protein, and the activity of some enzymes. The results also indicated that the use of cytokinin along with auxin has a beneficial effect on shoot regeneration.

Keywords

Main Subjects

H: Tissue Culture

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© 2019 by the authors. Licensee SCU, Ahvaz, Iran. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-Non Commercial 4.0 International (CC BY-NC 4.0 license) (http://creativecommons.org/licenses/by-nc/4.0/)

In Vitro Regeneration of Ornamental Crocus (Crocus vernus L.) by Using Plant Growth Regulators

References

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Volume 42, Issue 4December 2019Pages 429-440

Volume 42, Issue 4
December 2019
Pages 429-440