Physiological and sanitary quality of castor oil plant seeds due to ultraviolet-C radiation

Araújo, Marcos Eduardo Viana de; Barbosa, Eloiny Guimarães; Araújo, Rodrigo Starneck Lopes de; Teixeira, Itamar Rosa; Gomes, Felipe Alves; Corrêa, Paulo César

doi:10.1016/j.indcrop.2019.05.014

Cited by 9 publications

(10 citation statements)

References 40 publications

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“…Similar results were found in Bengal gram (Cicer arietinum L.) and horse gram (Macrotyloma uniflorum L.) by Gandhi [44], who observed that germination percentage decreased gradually with a progressive increase in exposure duration of UV-C light. According to de Araujo et al [45], UV-C up to a dose of 20.7 kJ m −2 resulted in a 50-66% increase in germination in castor oil plant seeds. In comparison, higher doses of 41.4 kJ m −2 reduced seed energy and decreased seed germination.…”

Section: Germination Percentagementioning

confidence: 99%

“…According to Kovács and Keresztes [49], the biological effect of UV-C light (100-280 nm) as non-ionizing radiation is owing to photons with enough energy to break chemical bonds, creating a photochemical reaction as compared to visible light photons (> 400 nm). Furthermore, three primary mechanisms may have contributed to UV-C radiation's beneficial effect on seeds: (1) UV-C radiation caused a breakdown in the seed coat, allowing the seeds to absorb more oxygen and water and lessening dormancy; (2) UV-C radiation raised the temperature to be suitable for germination; and (3) UV-C radiation increased seed respiration and mitochondrial activities [36,45]. According to Sarghein et al [50], UV radiation influences growth via phytohormones through photo destruction or enzymatic reactions.…”

Section: Tablementioning

confidence: 99%

“…According to Horbach et al [52], seeds with low respiration levels do not germinate rapidly or entirely. The seeds' dormancy is broken due to their absorption of radiation and energy conversion into heat, necessitating an increase in respiration to accommodate the cell-structure processes [36,45]. Moreover, seed respiration and oxygen consumption have been used as good indexes of seed vigor and the activation of germinative metabolic processes [53].…”

Section: Respiration Ratementioning

confidence: 99%

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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: Germination Percentagementioning

confidence: 99%

Section: Tablementioning

confidence: 99%

Section: Respiration Ratementioning

confidence: 99%

See 1 more Smart Citation

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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“…The main applications have been in water, agricultural seed and grain, seedlings, plants, post-harvest products and various solid and liquid food products such as milk, cereals, tuna fillets, bread, etc. [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Induced changes of phenolic compounds in turmeric bread by UV-C radiation

et al. 2021

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Phenolic compounds of breads added with turmeric at different concentrations (A: 0, B: 1.25, C: 2.5, D: 5 and E:10%) and radiated by UV-C (I. 0, II. 15, III. 30 and IV. 60 s), have been evaluated by HPLC (High-performance liquid chromatography). It is shown that: (i) UV-C radiation modifies the content of phenolic compounds as a function of the percentage of addition of turmeric and the exposure time. There were significant differences (ρ ≤ 0.05) in the concentration of phenolic acids of the turmeric bread (TB): 0 s (sinapic, chlorogenic, protocatechuic), 15 s (chlorogenic, ferulic, protocatechuic, p-hydroxybenzoic, gallic), 30 s (chlorogenic and gallic) and 60 s (chlorogenic). (ii) In TB without radiation appeared, the sinapic, beta resorcylic, syringic and ferulic acids. In the radiation of bread at 15 s, the phenolic acids chlorogenic, ferulic, protocatechuic, p-hydroxybenzoic, gallic, had the highest concentration in the breads added with turmeric at 10% (0.02 μg mL −1 ), 10% (0.38 μg mL −1 ), 1.25, 2.5, 5% (0.39 μg mL −1 ), 10% (1.06 μg mL −1 ) and 0% (1.10 μg mL −1 ). (iii) There was a degradation of phenolic acids due to UV-C radiation at 30 and 60 s. At 15 s radiation, sinapic, beta resorcylic, syringic and ferulic acids were not detected in turmeric breads from breads added with turmeric at (1.25, 1.25, 0 and 0%). In radiation at 60 s, beta resorcylic, syringic and ferulic acids were not detected in any bread added with turmeric. In addition, measurements of proximate chemistry, color, sensory analysis, and number of fungal colonies were performed. It is important to mention that the sanitary quality is improved by both UV-C radiation and turmeric. However, the highest results in sanitary quality improvement were due to turmeric.

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“…Its high dry matter yield and high plant and seed nutrition value contribute to ryegrass being one of the primary winter forages cultivated (Skonieski et al, 2011). Culture production success requires seeds of good physical and physiological quality (Finch-Savage;Bassel, 2016;Araujo et al, 2019). Thus, determining how to improve postharvest procedures, such as drying and storage, is of extreme importance in acquiring high quality seeds.…”

Section: Introductionmentioning

confidence: 99%

Comparison between desorption isotherm curves of ryegrass (Lolium multiflorum L.) and flax (Linum usitatissimum L.) seeds

et al. 2020

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ABSTRACT It is necessary to determine the sorption isotherms of seeds to develop adequate systems of storage and drying. The chemical composition of a product affects the sorption process; products with a high oil content adsorb a lower amount of moisture from the environment than products with a high carbohydrate content. Given the importance of the hygroscopicity of different agricultural products, this work aimed to determine, model and evaluate the difference between desorption isotherms of ryegrass and flax seeds grown at different temperature and relative humidity conditions. Ryegrass and flax seeds, which contained initial moisture contents of 10.4 and 8.7% (db), respectively, were used. The equilibrium moisture content of the seeds was determined using a static-gravimetric method at different temperatures (10, 20, 30, 40, and 50 ± 1 °C) and relative humidity values (between 11 and 96 ± 2%), in three replicates. Seven mathematical models were adjusted to the equilibrium moisture content experimental data of the seeds. The Chung Pfost model best fit the experimental data of ryegrass seeds, whereas the Smith model was determined to be the best fit for flax seeds. The equilibrium moisture content of the seeds was found to decrease as the temperature increased when the value of water activity was constant. The desorption isotherms of ryegrass seeds (Type II) and flax seeds (Type III) are different, according to Brunauer’s classification, which is caused by the composition (starch and oil content) of each product.

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Physiological and sanitary quality of castor oil plant seeds due to ultraviolet-C radiation

Cited by 9 publications

References 40 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

Induced changes of phenolic compounds in turmeric bread by UV-C radiation

Comparison between desorption isotherm curves of ryegrass (Lolium multiflorum L.) and flax (Linum usitatissimum L.) seeds

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