scholarly journals Role of Salicylic Acid and Components of the Phenylpropanoid Pathway in Basal and Cultivar-Related Resistance of Oilseed Rape (Brassica napus) to Verticillium longisporum

Plants ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 491 ◽  
Author(s):  
Xiaorong Zheng ◽  
Birger Koopmann ◽  
Andreas von Tiedemann
Keyword(s):  
Salicylic Acid ◽  
Brassica Napus ◽  
Ferulic Acid ◽  
Cinnamic Acid ◽  
Sinapic Acid ◽  
Coumaric Acid ◽  
Basal Resistance ◽  
Remarkable Increase ◽  
Verticillium Longisporum

Enhanced resistance is a key strategy of controlling ‘Verticillium stem striping’ in Brassica napus caused by the soil-borne vascular pathogen Verticillium longisporum. The present study analyses the role of a broad range of components in the phenylpropanoid and salicylic acid (SA) pathways in basal and cultivar-related resistance of B. napus towards V. longisporum. A remarkable increase of susceptibility to V. longisporum in SA-deficient transgenic NahG plants indicated an essential role of SA in basal resistance of B. napus to V. longisporum. Accordingly, elevated SA levels were also found in a resistant and not in a susceptible cultivar during early asymptomatic stages of infection (7 dpi), which was associated with increased expression of PR1 and PR2. In later symptomatic stages (14 or 21 dpi), SA responses did not differ anymore between cultivars varying in resistance. In parallel, starting at 7 dpi, an overall increase in phenylpropanoid syntheses developed in the resistant cultivar, including the activity of some key enzymes, phenylalanine ammonium lyase (PAL), cinnamyl alcohol dehydrogenase (CAD) and peroxidase (POX) and the expression of key genes, PAL4, CCoAMT, CCR, POX. As a consequence, a remarkable increase in the levels of phenolic acids (t-cinnamic acid, p-coumaric acid, caffeic acid, ferulic acid, sinapic acid) occurred associated with cultivar resistance. A principal component analysis including all 27 traits studied indicated that component 1 related to SA synthesis (PR1, PR2, POX, level of free SA) and component 2 related to lignin synthesis (level of free ferulic acid, free p-coumaric acid, conjugated t-cinnamic acid) were the strongest factors to determine cultivar-related resistance. This study provides evidence that both SA and phenolic acid synthesis are important in cultivar-related resistance, however, with differential roles during asymptomatic and symptomatic stages of infection.

scholarly journals Salicylic acid and salicylic acid glucoside in xylem sap of Brassica napus infected with Verticillium longisporum

2009 ◽  
Vol 122 (5) ◽  
pp. 571-579 ◽  
Author(s):  
Astrid Ratzinger ◽  
Nadine Riediger ◽  
Andreas von Tiedemann ◽  
Petr Karlovsky
Keyword(s):  
Salicylic Acid ◽  
Brassica Napus ◽  
Xylem Sap ◽  
Verticillium Longisporum ◽  
Salicylic Acid Glucoside

METABOLISM OF PHENYLPROPANOID COMPOUNDS IN SALVIA: II. BIOSYNTHESIS OF PHENOLIC CINNAMIC ACIDS

1959 ◽  
Vol 37 (1) ◽  
pp. 537-547 ◽  
Author(s):  
D. R. McCalla ◽  
A. C. Neish
Keyword(s):  
Caffeic Acid ◽  
Phenolic Acids ◽  
Cinnamic Acid ◽  
Shikimic Acid ◽  
Sinapic Acid ◽  
Coumaric Acid ◽  
Cinnamic Acids ◽  
Phenyllactic Acid ◽  
Salvia Splendens ◽  
Specific Activities

p-Coumaric, caffeic, ferulic, and sinapic acids were found to occur in Salvia splendens Sello in alkali-labile compounds of unknown constitution. A number of C14-labelled compounds were administered to leafy cuttings of salvia and these phenolic acids were isolated after a metabolic period of several hours and their specific activities measured. Cinnamic acid, dihydrocinnamic acid, L-phenylalanine, and (−)-phenyllactic acid were found to be good precursors of the phenolic acids. D-Phenylalanine, L-tyrosine, and (+)-phenyllactic acid were poor precursors. A kinetic study of the formation of the phenolic acids from L-phenylalanine-C14 gave data consistent with the view that p-coumaric acid → caffeic acid → ferulic acid → sinapic acid, and that these compounds can act as intermediates in lignification. Feeding of C14-labelled members of this series showed that salvia could convert any one to a more complex member of the series but not so readily to a simpler member. Caffeic acid-β-C14 was obtained from salvia after the feeding of L-phenylalanine-β-C14 or cinnamic acid-β-C14, and caffeic acid labelled only in the ring was obtained after feeding generally labelled shikimic acid.

scholarly journals The effects of plant density and irrigation on phenolic content in cauliflower 

2017 ◽  
Vol 44 (No. 4) ◽  
pp. 178-185 ◽  
Author(s):  
Alina Kałużewicz ◽  
Jolanta Lisiecka ◽  
Monika Gąsecka ◽  
Włodzimierz Krzesiński ◽  
Tomasz Spiżewski ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Ferulic Acid ◽  
Gallic Acid ◽  
Caffeic Acid ◽  
Phenolic Acids ◽  
Plant Density ◽  
Phenolic Content ◽  
Sinapic Acid ◽  
Dry Weight ◽  
Coumaric Acid

This study was conducted to study the influence of plant density and irrigation on the content of phenolic compounds, i.e., phenolic acids and flavonols in cv. ‘Sevilla’ cauliflower curds. Levels of phenolic acids and flavonols were in the range of 3.0–6.2 mg and 25.4–87.8 mg/100 g of dry weight, respectively, depending on plant density and irrigation. Of the phenolic acids, caffeic acid was detected in the highest amount, followed by p-coumaric acid, sinapic acid, gallic acid, and ferulic acid. Of the two flavonols detected, the levels of quercetin were higher than those of kaempferol. The content of the detected phenolic acids (with the exception of ferulic acid) and both flavonols increased with increasing plant density. Furthermore, the concentration of phenolic compounds (with the exception of ferulic acid) was significantly higher under irrigation.

scholarly journals PHENYLPROPANOIDS AND FATTY ACIDS LEVELS IN ROOTS AND LEAVES OF DATURA STRAMONIUM AND DATURA INNOXIA

2017 ◽  
Vol 9 (7) ◽  
pp. 150
Author(s):  
Bilal Rahmoune ◽  
Izzeddine Zakarya Zerrouk ◽  
Abdelkader Morsli ◽  
Madjda Khelifi Slaoui ◽  
Lakhdar Khelifi ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Ferulic Acid ◽  
Caffeic Acid ◽  
Cinnamic Acid ◽  
Sinapic Acid ◽  
Datura Stramonium ◽  
Fatty Acids Composition ◽  
Datura Innoxia ◽  
Max Planck ◽  
Leaves And Roots

Objective: The aim of this research was to determine and compare phenylpropanoids and fatty acids composition in two plant species, Datura innoxia and Datura stramonium.Methods: Phenylpropanoids and fatty acids composition in leaves and roots extracted from Datura innoxia and Datura stramonium, grown under greenhouse conditions, was analyzed by gas chromatography–electron impact/time of flight-mass spectrometry (GC-EI/TOF-MS) chromatography techniques. Analyses were carried out at the Max Planck Institute for Molecular Plant Physiology of Golm (Germany).Results: We revealed that Datura stramonium (DS) contains hydroxy-hexanedioic acid while hexanoic acid was found in Datura innoxia (DI). Also, two fatty acids are common to both Datura species, hexadecanoic acid and octadecanoic acid, with an almost equal rate between leaves and roots. However, phenylpropanoids composition revealed eight compounds; luteolin, quercetin, trans-caffeic acid, trans-ferulic acid, cis-caffeic acid, cis-4-hydroxy-cinnamic acid, trans-4-hydroxy-cinnamic acid and trans-sinapic acid in DI. However, in DS, five compounds were detected: luteolin, quercetin, trans-caffeic acid, trans-ferulic acid and dihydroferulic acid. Also in both Datura species, phenylpropanoids concentration in leaves was significantly higher than in the roots.Conclusion: Our results showed a difference in phenylpropanoids and fatty acids compositions between the two Datura species, with a significantly higher concentration of phenylpropanoids in Datura innoxia than in Datura stramonium

scholarly journals Role of salicylic acid in heat stress tolerance in tri-genomic Brassica napus L.

2020 ◽  
Vol 33 (1) ◽  
pp. 13-20
Author(s):  
Muhammad Awais Ghani ◽  
Muhammad Mehran Abbas ◽  
Basharat Ali ◽  
Khurram Ziaf ◽  
Muhammad Azam ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Heat Stress ◽  
High Temperature ◽  
Brassica Napus ◽  
Biochemical Analysis ◽  
Foliar Application ◽  
Brassica Napus L ◽  
Elevated Activity ◽  
Heat Stress Tolerance

Tri-genomic Brassica napus L.wasdeveloped by the cross between Brassica napusand Brassica nigra. The crop is animportant source of vegetable seed oil in Pakistan,after cotton. The low oilseed rape yield is attributed to high temperature in the production zones. Interspecific hybridization using these two speciescan be helpful to produce heat resistant hybrids. On the other hand, it has been found that foliar application of different plant growth regulators can be used to reduce the heat stress in Brassica. The objectiveof this studywas to test the response of three different tri-genomic hybrids to high temperature stressat seedling stage. Seedlings were foliar sprayed with 0.13 mM salicylic acid (SA) prior to exposure tohigh temperatureat two true leaf stage. The plants were harvested after 30 days of sowing for growth and biochemical analysis. Plants ofV38 showed the highest values for all morphological traits and biochemical activities among the threehybrids. In general, plants exposed to the temperature stress exhibited a significant decline in growth, chlorophyll content and enzyme activity.Foliar application of SA significantly improved leaf and root biomass under heat stress.Further, antioxidativeenzyme activities significantly increased in response to SA either compared to control or to plants exposed to temperature stress.It is concluded thatapplication of salicylic acid elevated activity of antioxidative enzymes and was helpful in mitigating the detrimental effects of high temperature inoil seed rape.

scholarly journals Salicylic Acid Phytohormone Decreased the Toxicity Damage of Exogenous Lead Absorption in Seedlings of an Oilseed Plant, Brassica napus L. Grown in Hydroponic Conditions

2019 ◽  
pp. 1-15
Author(s):  
Mahdi Khozaei ◽  
Shiva Boroumand Jazi
Keyword(s):  
Salicylic Acid ◽  
Brassica Napus ◽  
Soluble Sugars ◽  
Lead Toxicity ◽  
Chlorophyll Synthesis ◽  
Dry Mass ◽  
Inhibitory Effects ◽  
Brassica Napus L ◽  
Carbohydrate Levels

Oilseed plant, Brassica napus L. seedlings grown in hydroponic condition with different concentrations of Pb were treated with salicylic acid (SA) to investigate the role of exogenous salicylic acid in alleviating lead toxicity on biochemical and physiological activities of the plant. The results showed that application of different concentrations of Pb increased soluble sugars and reduced carbohydrate levels significantly in roots and shoots of the plants. The stress induced by application of Pb triggered significant inhibitory effects on growth and chlorophyll synthesis induced on the production of protein and proline and enhanced the levels of antioxidant activity. Salicylic acid (SA) treated plants showed alleviation increasing total dry mass, leaf area, shoot and root length as well as leaf total chlorophyll content in responses to Pb stress. Results revealed the importance of salicylic acid (SA) activity in enabling plants to reduce the soluble sugars and increase of insoluble sugar in heavy -metal-stressed plants. The content of proline and proteins were also reduced in plants were treated with salicylic acid. Our data provide evidence that salicylic acid treatment decreased the activity of antioxidant enzymes in plants were exposed to different levels of Pb.

scholarly journals Whitening Activity of Constituents Isolated from the Trichosanthes Pulp

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Rongchao Zhang ◽  
Xiuqin Hu ◽  
Bo Zhang ◽  
Zhen Wang ◽  
Chunxiang Hao ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Salicylic Acid ◽  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Cinnamic Acid ◽  
Coumaric Acid ◽  
Development And Utilization ◽  
First Time ◽  
Further Development ◽  
Whitening Activity

Whitening cosmetics market has a bright future, and pure natural whitening products of traditional Chinese medicine have always been a research hotspot. In this research, the whitening active ingredient of Chinese medicine Trichosanthes pulp was isolated and purified for the first time, and its whitening mechanism was clarified. Chromatographic methods such as silica gel, ODS, and HPLC were used to isolate and purify them. B16 cells were used to measure the antioxidant activity, tyrosinase activity, and melanin removal activity. A total of 20 compounds were isolated, including p-hydroxybenzaldehyde (1), salicylic acid (2), vanillic acid (3), isovanillic acid (4), protocatechuate (5), trans-cinnamic acid (6), 4-coumaric acid (7), trans-ferulic acid (8), drechslerol-B (9), cyclotucanol 3-palmitate (10), 5-acetoxymethyl-2-furaldehyde (11), 5-hydroxymethylfurfural (12), diosmetin (13), apigenin (14), chrysoeriol (15), luteolin (16), 4′-hydroxyscutellarin (17), quercetin (18), 3′,5-dihydroxy-7-(β-D-glucopyranosyloxy)-4′-methoxyflavone (19), and cofloxacin-7-O-β-D-glucoside (20). Among them, compounds 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 have good antioxidant repairing effects; compounds 3, 4, 5, 6, and 7 have high black inhibition; compounds 1, 2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 have obvious tyrosine acidase inhibitory activity. The results laid foundation for the further development and utilization of Trichosanthes pulp resources and also provide a basis for the development of natural whitening cosmetics.

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