Effect of Harmel Extract on Bacterial Population in Vase Solution and Vase Life of ‘ Stanza’ and ‘ Pink Elegance’ Cultivars of Gerbera Cut Flower

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MOHAMMADI MEISAM; AELAEI MITRA; SAIDI MEHDI

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Journal: Plant Productions Year:2020 | Volume:43 | Issue:2 Page(s): 171-184

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Title

Effect of Harmel Extract on Bacterial Population in Vase Solution and Vase Life of ‘ Stanza’ and ‘ Pink Elegance’ Cultivars of Gerbera Cut Flower

Author(s)

MOHAMMADI MEISAM | AELAEI MITRA | SAIDI MEHDI | Issue Writer Certificate

Keywords

Bacterial populationQ2

CatalaseQ1

Electrolyte leakageQ1

Abstract

Background and Objectives Gerbera is one of the important cut flowers in the floriculture industry, but it is sensitive to early wilting and neck bending which reduce its postharvest vase life. In cut flowers, water deficits are created when transpiration is more than water absorption. Therefore, petal wilting and neck bending increase in these flowers. These conditions are mainly due to occlusion of the vascular bundle, which can occur in different ways, such as the activity of pathogenic bacteria and other microorganisms in vascular bundle. In recent years, due to the adverse effects of chemical antimicrobial compounds on human health and the environment, many studies have been conducted to find replacement materials to maintain the quality and vase life of cut flowers in postharvest. Therefore, in this study, the effect of different concentrations of harmel aqueousalcoholic extract (Peganum harmala L. ) on Bacterial population and vas life of ‘ Stanza’ and ‘ Pink Elegance’ cultivars of Gerbera cut flower were studied. Materials and Methods The effect of concentrations 0, 0. 25, 0. 5, 0. 75 and 1% of the aqueous-alcoholic extract of Harmel plant was studied in a factorial experiment based on completely randomized design with four replications. At harvest time, 3, 6 and 9 days after harvest (at 20 ° C and 70% relative humidity), the effect of treatments on the Bacterial population of the vase solution and end stem, vase life and some characteristics of ‘ Stanza’ and ‘ Pink Elegance’ Gerbera cut flowers were studied. Results The results showed that the inhibitory effect of harmal extracts on gram-positive bacteria was higher than gram-negative bacteria. Also, ‘ Stanza’ cultivar had better quality and longer vase life than ‘ Pink Elegance’ cultivar. By increasing the vase life of flowers, the quality of these flowers decreased. In the first place, however, concentrations of 0. 25% and then 0. 5% of the harmal extract performed better than other treatments in various aspects: first, they reduced the bacterial solution, stem end, and Electrolyte leakage in stem and petals; second, they preserved quality (discolored of vase solution, discolored of petals and stem), relative fresh weight, stem diameter, total soluble solids, Catalase activity and phenylalanine ammonia lyase activity; and finally, they increased vase life of gerbera flowers in both cultivars. Concentrations of 0. 75% and 1% increased allelopathic substances in cut flower. While these treatments decreased the Bacterial population in vase solution and stem end, they did not have a significant effect on the quality and vase life of gerbera cut flowers. Discussion The results of this study showed that the different concentrations of harmal extract significantly reduced the growth of microbial agents, including the Bacterial population, but by increasing the concentration of the harmal extract, the allelopathic effects of this plant extract on gerbera cut flowers were harmful and did not affect their vase life and quality. Therefore, the concentration of 0. 25% then 0. 5% reduced the Bacterial populations in vase solution and stem end of cut flowers and preserved the quality and vase life of ‘ Stanza’ and ‘ Pink Elegance’ cultivars. Therefore, the use of low concentrations of the harmel aqueous-alcoholic extract is recommended to reduce the microbial population of the vase solution and maintain the quality and vase life of the gerbera cut flowers.

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APA: Copy

MOHAMMADI, MEISAM, AELAEI, MITRA, & SAIDI, MEHDI. (2020). Effect of Harmel Extract on Bacterial Population in Vase Solution and Vase Life of ‘ Stanza’ and ‘ Pink Elegance’ Cultivars of Gerbera Cut Flower. THE PLANT PRODUCTION (SCIENTIFIC JOURNAL OF AGRICULTURE), 43(2 ), 171-184. SID. https://sid.ir/paper/381710/en

Vancouver: Copy

MOHAMMADI MEISAM, AELAEI MITRA, SAIDI MEHDI. Effect of Harmel Extract on Bacterial Population in Vase Solution and Vase Life of ‘ Stanza’ and ‘ Pink Elegance’ Cultivars of Gerbera Cut Flower. THE PLANT PRODUCTION (SCIENTIFIC JOURNAL OF AGRICULTURE)[Internet]. 2020;43(2 ):171-184. Available from: https://sid.ir/paper/381710/en

IEEE: Copy

MEISAM MOHAMMADI, MITRA AELAEI, and MEHDI SAIDI, “Effect of Harmel Extract on Bacterial Population in Vase Solution and Vase Life of ‘ Stanza’ and ‘ Pink Elegance’ Cultivars of Gerbera Cut Flower,” THE PLANT PRODUCTION (SCIENTIFIC JOURNAL OF AGRICULTURE), vol. 43, no. 2 , pp. 171–184, 2020, [Online]. Available: https://sid.ir/paper/381710/en

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