Changes in yields and volatile oil composition of fennel (Foeniculum vulgare Mill.) in high plant populations

Özel, Abdülhabip; Koşar, İslim; Demirbilek, Tuncay; Erden, Kaan

doi:10.4081/ija.2019.1347

Cited by 5 publications

(2 citation statements)

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“…Özel et al [66] reported that fennel essential oil content varied between 3.5% and 6%; however, in our investigation, the control sample yielded the lowest significant value of 1.28%, while the 25 min treated sample yielded the highest significant value of 1.71%. This variation between results might be due to the cultivar and the environmental conditions (soil moisture, temperature, soil nutrients, etc.)…”

Section: Essential Oilcontrasting

confidence: 79%

Influence of germicidal ultraviolet radiation UV-C on the quality of Apiaceae spices seeds

Kamel

Elkholy

Tolba

et al. 2022

Chem. Biol. Technol. Agric.

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Background Spices are susceptible to surface microbial contamination. Countries’ ban on ethylene oxide fumigation due to possible residual toxicity encouraged the usage of irradiation. Surface sterilization with low doses of ultraviolet radiation has been extensively researched as a safe, eco-friendly, and fast route. This study examines the quality of Apiaceae spices for consumption, including anise, fennel, caraway, and cumin, in response to germicidal ultraviolet radiation using a developed sterilization unit. Methods The influence of UV-C (254 nm, 10.5 mW/cm2) on the fungal and microbial count, germination percentage, respiration rate, phenolic content, essential oil, and the activity of antioxidant enzymes was investigated at exposure durations of 0–45 min in increments of 5 min. The treated seeds were packed in polyethylene bags in a naturally aerated storage room for 30 days before the inspection. Results The obtained data showed that UV-C stimulated seeds germination and increased respiration rate for all studied types. The 25 min of exposure exhibited the highest significant values compared to the control, considered a good indicator of seed vigor. In addition, UV-C exposure between 20 and 35 min promoted the accumulation of phenolic compounds and increased the oil content as a defense mechanism against radiation. Conversely, higher exposure to UV-C led to a significant reduction in phenolic and oil contents. Furthermore, the exposure to UV-C radiation enhanced the activity of antioxidant enzymes in terms of peroxidase and catalase, which progressively increased with increasing exposure durations, reached their peak at 25–30 min, and subsequently declined with extended exposure time was extended. In a similar pattern, exposure to UV-C radiation increased polyphenol oxidase activity to its highest level at 25 min, owing to the development of antioxidant protective mechanisms against oxidative stress. Conclusion UV-C irradiation in the range of 25–30 min is the most appropriate pretreatment to maintain the vitality of the examined seeds. Graphical Abstract

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Section: Essential Oilcontrasting

confidence: 79%

Influence of germicidal ultraviolet radiation UV-C on the quality of Apiaceae spices seeds

Kamel

Elkholy

Tolba

et al. 2022

Chem. Biol. Technol. Agric.

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“…High presence of trans-anethole in our sample clearly reveals that our sample is trans-anethole-rich chemotype of fennel. Although some differences observed, the chemical composition of the fennel essential oil agrees with same species from different countries including Turkey (Yamini et al, 2002;Mimica-Dukic et al, 2003;Ozel et al, 2019;Kalleli et al, 2019). There are a many studies on chemical compositions of the EO obtained from the leaves of L. nobilis from different locations of the world.…”

Section: Chemical Compositions Of Essential Oilssupporting

confidence: 62%

Determination of chemical compositions and antifungal activities of laurel and fennel essential oils against fungal disease agents of cypress seedlings

Kara

Soylu

Türkmen

et al. 2020

Tekirdağ Ziraat Fakültesi Dergisi

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Fusarium oxysporum and Pestalotiopsis funerea are the most common fungal disease agents of conifer seedlings causing root rot and shoot or tip blight diseases. In this study, chemical compositions and antifungal activities of essential oils of fennel (Foeniculum vulgare Mill.) and laurel (Laurus nobilis L.) were determined against root rot and wilt disease agents F. oxysporum and P. funerea in vitro conditions. Chemical compositions of essential oils were determined by using GC-MS analysis. Antifungal volatile phase effects of essential oils were determined on inhibition of mycelial growth in vitro conditions by using different concentrations. The effect of most effective concentrations of essential oils on the morphology of fungal hypha was also determined by using light microscope. GC-MS analysis of essential oils of laurel and fennel plants revealed that eucalyptol (52.88%) and α-terpinyl acetate (11.77%) were major components of laurel; trans-anethole (81.55%) and limonene (5.88%) were major components of fennel essential oils. Volatile phase effects of fennel and laurel essential oils were found to completely inhibit mycelial growth of F. oxysporum at 30.0 and 50.0 µl petri -1 concentrations, respectively. Complete growth inhibition of P. funerea by essential oil of fennel and laurel were observed at relatively lower concentrations (20.0 and 25.0 µl petri -1 concentrations, respectively). Light microscopic observations on hyphae, exposed to volatile phase of the most efficient concentrations of essential oil, revealed considerable structural deformations such as cytoplasmic coagulation, vacuolations and protoplast leakage. In conclusion, our results suggest that essential oils have the potential for use in control of fungal diseases of conifer plants.

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Traditional Farming of Apiaceae Species in Türkiye: Pimpinella anisum L., Foeniculum vulgare Mill., Cuminum cyminum L.

Kirici,

Bayram,

Inan

et al. 2023

Medicinal and Aromatic Plants of the World

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Changes in yields and volatile oil composition of fennel (Foeniculum vulgare Mill.) in high plant populations

Cited by 5 publications

References 0 publications

Influence of germicidal ultraviolet radiation UV-C on the quality of Apiaceae spices seeds

Influence of germicidal ultraviolet radiation UV-C on the quality of Apiaceae spices seeds

Determination of chemical compositions and antifungal activities of laurel and fennel essential oils against fungal disease agents of cypress seedlings

Traditional Farming of Apiaceae Species in Türkiye: Pimpinella anisum L., Foeniculum vulgare Mill., Cuminum cyminum L.

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