The Metabolism of Aromatic Compounds in Higher Plants

Koukol, Jane; Conn, Eric E.

doi:10.1016/s0021-9258(19)61721-7

Cited by 626 publications

(45 citation statements)

References 26 publications

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“…Similary response noted in wheat in response to Lessonia vadosa alginate treatment [15], and in date palm root treated with 1 g•L −1 of chitosan [51]. This result is predictable since this enzyme catalyzes the conversion of L-phenylalanine to trans-cinnamic acid, a precursor of most phenolic compounds [52]. Their involvement in plant resistance is widely reported [47,53,54] and their role has been shown to be key in plant-pathogen interactions.…”

Section: Discussionsupporting

confidence: 56%

Use of Alginate Extracted from Moroccan Brown Algae to Stimulate Natural Defense in Date Palm Roots

et al. 2020

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Our study aimed to search for seaweed polysaccharides able to stimulate date palm defense mechanisms. Extraction, purification, characterization, and elicitor activity of sodium alginate (FSSA and BBSA) from Moroccan brown seaweeds Fucus spiralis and Bifurcaria bifurcata were investigated. FSSA and BBSA were characterized by proton nuclear magnetic resonance spectroscopy (1H-NMR) and size exclusion chromatography (HPLC-SEC). The mannuronic acid/guluronic acid (M/G) ratio of FSSA was M/G = 0.92 indicating that FSSA contained 48% and 52% of mannuronic and guluronic acids respectively, and the M/G ratio of BBSA was 0.47 indicating that BBSA contained 32% and 68% of mannuronic and guluronic acids respectively. Elicitor activity of FSSA and BBSA was carried out by developing an innovative study model on the date palm. The elicitor capacities were evaluated by investigating phenolic metabolism including phenylalanine ammonia-lyase (PAL) activity and total polyphenol content in seedling roots of date palm maintained in alginates solution (FSSA and BBSA) at different concentrations. The results obtained show that the PAL activity and the phenolic compound content were significantly stimulated with 1 mg·mL−1 of FSSA and BBSA; after 1 day of treatment with FSSA, and after 12 h of treatment with BBSA. These results show clearly those alginates extracted from Moroccan brown algae induced in date palm roots the stimulation of natural defense mechanisms.

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Section: Discussionsupporting

confidence: 56%

Use of Alginate Extracted from Moroccan Brown Algae to Stimulate Natural Defense in Date Palm Roots

et al. 2020

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“…PAL is an important enzyme that is the starting point for biosynthesis of phenolic substances through conversion of Lphenylalanine into trans-cinnamate, and APX is known to be an important factor in preventing various oxidative stresses in plant chloroplasts [23,24]. It has been reported that the PAL gene is associated with various environmental stimuli and the accumulation of secondary metabolites, such as phenolic substances, in various crops [25,26].…”

Section: Discussionmentioning

confidence: 99%

Molecular characterization and biological changes caused by Agrobacterium-mediated infiltration of PgTRX1

Choi

Seo

Lee³

et al. 2021

JABC

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In order to test the functionality of Panax ginseng thioredoxin 1 (PgTRX1) isolated from fermented wild ginseng roots, a transient effect on physiological activity were performed over a short time frame using the Agrobacterium infiltration technique. The PgTRX1 gene isolated from fermented wild ginseng was confirmed to have a size of 579 bp, and the expression of PgTRX1 was the highest in the sample after 6 h of fermentation. As a result of constructing this gene and confirming the infiltration reaction mediated by Agrobacterium in tobacco leaves, it was found that the expression of the NbHSR203j gene was also induced as PgTRX1 expression increased. As a result of measuring the biological activity of the infiltration samples, the total phenol content increased by 35.45±1.84 to 49.01±1.84 µg GAE/mL compared to the control, and the total flavonoid amount of 9.52±0.41 to 9.82±0.25 µg QE/mL was slightly high. From these results, Agrobacterium-mediated PgTRX1 appears to be related to the hypersensitive response induction mechanism of plants and the production of secondary metabolites such as phenolic substances.

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“…The activity of PAL (EC 4.3.1.5) was quantified following the protocol developed by Koukol and Conn (1961) with some modifications.…”

Section: Disease-related Enzyme Activitiesmentioning

confidence: 99%

Assessment of the role of brassinosteroid in regulating the disease resistance of postharvest tomato fruit by proteomic analysis

Ding

Sheng

2021

J. Food Process. Preserv.

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As one of the most important vegetables worldwide, tomato (Solanum lycopersicum) fruits are prone to problems of fruit rot in the field and during storage, causing a significant reduction in the quality and production of the fruit. Alternaria solani, which is a common fungal pathogen for tomato, causes various diseases in tomato including fruit rot (Attia et al., 2020). Resistance to fruit rot caused by A. solani in tomato is necessary to protect the production and quality of tomato fruits and reduce the storage costs. Brassinosteroid (BR) is one of the critical phytohormones, involved in various plant development processes, including cell growth and elongation, tissue differentiation and initiation, and promotion of other plant hormones (Shahnejat-Bushehri et al., 2017; Trevisan et al., 2020; Zhu et al., 2019). BR modulates plant immunity under different physiological conditions (Yu et al., 2018). Brassinosteroid-signaling kinase5 (BSK5) is a member of the receptor-like cytoplasmic kinase subfamily XII. Majhi et al. (2019) investigated the susceptibility of BSK5 mutant plants to the bacterial pathogen Pseudomonas syringae and to the fungus Botrytis cinerea in Arabidopsis (Arabidopsis thaliana) and found that BSK5 plays a role in pattern-triggered immunity by interacting with multiple immune receptors. Wang et al. (2020) found that BR pretreatment can enhance the resistance to Phytophthora sojae in soybeans by promoting lignin biosynthesis. Marcos et al. (2015) found that BR could improve the resistance to P. syringae through more active cell damage repair. BR also improves disease resistance in fruits, as it can reduce

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The Metabolism of Aromatic Compounds in Higher Plants

Cited by 626 publications

References 26 publications

Use of Alginate Extracted from Moroccan Brown Algae to Stimulate Natural Defense in Date Palm Roots

Use of Alginate Extracted from Moroccan Brown Algae to Stimulate Natural Defense in Date Palm Roots

Molecular characterization and biological changes caused by Agrobacterium-mediated infiltration of PgTRX1

Assessment of the role of brassinosteroid in regulating the disease resistance of postharvest tomato fruit by proteomic analysis

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