Changes in some antioxidant enzymes and physiological indices of purple coneflower (Echinacea purpurea L.) in response to water deficit and foliar application of salicylic acid and spermine under field condition

Darvizheh, Hakimeh; Zahedi, Morteza; Abbaszadeh, Bohloul; Razmjoo, Jamshid

doi:10.1016/j.scienta.2018.12.037

Cited by 34 publications

(26 citation statements)

References 73 publications

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“…Therefore, these fruits were richer in bioactive compounds which have beneficial effects on human health 30 . Authors such as Darvizheh et al 31 . observed that the application of PAs under abiotic stress (drought) stimulated antioxidant activity due to an increase in the activities of antioxidant enzymes.…”

Section: Resultsmentioning

confidence: 99%

Foliar application of putrescine before a short‐term heat stress improves the quality of melon fruits (Cucumis melo L.)

et al. 2020

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BACKGROUND Climate change has caused an increase in the frequency and intensity of heatwaves, worldwide, which subject plants to thermal stress for short periods; this can affect the quality of melon fruits, both negatively and positively. Since the application of putrescine has been shown to help increase tolerance of abiotic stresses, the objective of this work is to determine the effects of the foliar application of putrescine (1.5 and 5 mmol L‐1) before a short heat stress (HS) on the quality of melon fruits. RESULTS The results indicate that HS had a positive effect on the quality of melon fruits, since it increased the total sugars and polyamines contents and the antioxidant capacity, and reduced the presence of substances undesirable in foods such as nitrate. However, the fruit quality was further increased by the combination of HS and putrescine (5 mmol L‐1). In this case, the melon fruits showed increases in their antioxidant capacity and contents of polyamines, amino acids and minerals beneficial to health. The nitrate concentration was even lower than in the control fruits. CONCLUSION This novel study highlights the possibility of improving the nutritional quality of melon pulp by applying foliar putrescine in combination with a short period of high temperature. © 2020 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Foliar application of putrescine before a short‐term heat stress improves the quality of melon fruits (Cucumis melo L.)

et al. 2020

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“…Medicinal Plant Research 2021, Vol.11, No.1, 1-13 http://hortherbpublisher.com/index.php/mpr ( 2005), an external application of salicylic acid increased superoxide dismutase and catalase activity in wheat plants and the highest level was obtained for superoxide dismutase. Also, Darvizheh et al (2018) showed that antioxidant activity of enzymes in ornamental purple coneflower was increased using salicylic acid. However, this increase is only significant for superoxide dismutase at low concentrations of salicylic acid, so, results show that among tested enzymes, superoxide dismutase showed the highest response to salicylic acid application.…”

Section: Superoxide Dismutase Enzymementioning

confidence: 99%

Assessment of Physiological and Phytochemical Traits of Purple Coneflower (<i>Echinacea purpurea</i> L. Moench) in Response to Salicylic Acid and Methyl Jasmonate Application

Mohebby¹,

Mortazavi²,

Kheiry³

et al. 2021

mpr

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Salicylic-acid and methyl-jasmonate are phytohormonal eilicitors that play important roles in regulating a number of physiological and phytochemical processes. For this purpose, a research was conducted as factorial based on complete randomized block design (CRBD) with three replications at the research field of agricultural faculty of Zanjan university during farming years of 2017～2018 and 2018～2019. The first factor was salicylic-acid (0 (control), 50, 100 and 150 mM) and the second factor was methyl-jasmonate (0 (control), 50, 100 and 200 µM). In the first year of experiment, treatments were sprayed on plants (four plants per plot) in two stages (20 days apart). In the second year they were also sprayed on remaining plants as the first year. Results of ANOVA as factorial-split in time showed that at the level of one percent (p<0.01), the effect of salicylic-acid on catalase, peroxidase and superoxide dismutase enzymes traits and the effect of methyl-jasmonate on antioxidant activity and catalase enzyme traits and the interaction of salicylic-acid and methyl-jasmonate on antioxidant activity, catalase, peroxidase and superoxide dismutase enzymes traits were significant. Also, at the level of five percent (p<0.05), the effects of methyl-jasmonate on superoxide dismutase enzyme trait was significant. The interaction of salicylic-acid and methyl-jasmonate factor was also significant on total protein trait at the level of 10 percent (p<0.1). The highest amount of chlorogenic acid in the first year was in the treatment of 100 mM of salicylic-acid and 50 μM of methyl-jasmonate and the highest amount in the second year was in the treatment of 100 mM of salicylic-acid and 100 μM of methyl-jasmonate. Also, the highest amount of chicoric acid in the both years was in the treatment of 100 mM of salicylic-acid and 100 μM of methyl-jasmonate.

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“…While the industrial application of E. purpurea essential oils is well established, several factors such as weather changes, plant growth stage 14 , and method of cultivation may influence both the composition and production of E. purpurea essential oil 15 . The open field cultivation of E. purpurea has some significant limitations such as crop inconsistency, seed dormancy 16 , water stress regims 17 , microbes, heavy metal ions and other pollutants 2 and loss of wild germplasm, that affect the different chemical composition of the plant extract. The above limitations have prompted a shift towards plant production under greenhouse conditions, especially in hydroponic (or soilless) culture systems 18 .…”

Section: Introductionmentioning

confidence: 99%

Optimizing hydroponic culture media and NO3−/NH4+ ratio for improving essential oil compositions of purple coneflower (Echinacea purpurea L.)

Ahmadi

Samadi

Sepehr

et al. 2021

Sci Rep

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Medicinal plants represent a valuable commodity due to beneficial effects of their natural products on human health, prompting a need for finding a way to optimize/increase their production. In this study, a novel growing media with various perlite particle size and its mixture with peat moss was tested for hydroponic-based production of Echinacea purpurea medicinal plant under greenhouse conditions. The plant growth parameters such as plant height, total fresh leave weight, fresh root weight, total biomass, total chlorophyll, leaf area, and essential oil compositions were assessed. Perlite particle size in the growing media was varied from very coarse (more than 2 mm) to very fine (less than 0.5 mm), and the ratio between perlite and peat moss varied from 50:50 v/v to 30:70 v/v. In addition, two nitrate (NO3−) to ammonium (NH4+) ratios (90:10 and 70:30) were tested for each growing media. The medium containing very fine-grade perlite and 50:50 v/v perlite to peat moss ratio was found to be most optimal and beneficial for E. purpurea performance, resulting in maximal plant height, fresh and dry weight, leaf surface area, and chlorophyll content. It was also found that an increase in NO3−/NH4+ ratio caused a significant increase in plant growth parameters and increase the plant essential oil content. The major terpene hydrocarbons found in extract of E. purpurea with the best growth parameters were germacrene D (51%), myrcene (15%), α-pinene (12%), β-caryophyllene (11%), and 1-Pentadecene (4.4%), respectively. The percentages of these terpene hydrocarbons were increased by increasing of NO3−/NH4+ ratio. It can be concluded that decreasing the perlite particle size and increasing the NO3−/NH4+ ratio increased the plant growth parameters and essential oil compositions in E. purpurea.

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Changes in some antioxidant enzymes and physiological indices of purple coneflower (Echinacea purpurea L.) in response to water deficit and foliar application of salicylic acid and spermine under field condition

Cited by 34 publications

References 73 publications

Foliar application of putrescine before a short‐term heat stress improves the quality of melon fruits (Cucumis melo L.)

Foliar application of putrescine before a short‐term heat stress improves the quality of melon fruits (Cucumis melo L.)

Assessment of Physiological and Phytochemical Traits of Purple Coneflower (<i>Echinacea purpurea</i> L. Moench) in Response to Salicylic Acid and Methyl Jasmonate Application

Optimizing hydroponic culture media and NO3−/NH4+ ratio for improving essential oil compositions of purple coneflower (Echinacea purpurea L.)

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