Variabilidade sazonal da composição química e atividade antioxidante de extratos de folhas de "Maytenus ilicifolia" Mart. ex Reiss, "Maytenus aquifolium" Mart. (Celastraceae) e seus híbridos Seasonal variation of the chemical composition and antioxidant activity of leaf extracts of "Maytenus ilicifolia" Mart. ex Reiss, "Maytenus aquifolium" Mart. (Celastraceae) and their hybrid.

2019 ◽  
Author(s):  
Elisa Ribeiro Miranda Antunes
Keyword(s):  
Antioxidant Activity ◽  
Seasonal Variation ◽  
Chemical Composition ◽  
Leaf Extracts ◽  
Maytenus Ilicifolia

scholarly journals Chemical Composition, Production of Secondary Metabolites and Antioxidant Activity in Coffee Cultivars Susceptible and Partially Resistant to Bacterial Halo Blight

Plants ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1915
Author(s):  
Joyce Alves Goulart da Silva ◽  
Mário Lúcio Vilela de Resende ◽  
Ingridy Simone Ribeiro ◽  
Adriene Ribeiro Lima ◽  
Luiz Roberto Marques Albuquerque ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Secondary Metabolites ◽  
Pseudomonas Syringae ◽  
Total Phenolic ◽  
Leaf Extracts ◽  
Defense Strategies ◽  
Halo Blight ◽  
Phenolic Profiles ◽  
Phenolic And Flavonoid

Coffee production is one of the main agricultural activities in Brazil, and several coffee cultivars with disease resistance have already been developed. The secondary metabolites produced by plants are closely associated with defense strategies, and the resistance of coffee cultivars to bacterial halo blight (BHB) can be related to these compounds. Therefore, this study aims to compare a partially resistant coffee cultivar (Iapar-59) and a susceptible cultivar (Mundo Novo 376/4) to BHB (Pseudomonas syringae pv. garcae) in relation to the chemical composition and antioxidant activity of the leaf extracts. In addition, this study determined the total phenolic and flavonoid contents and phenolic profiles of the Iapar-59 leaf extracts of plants inoculated with P. syringae pv. garcae. The Iapar-59 extract showed a higher content of phenolic compounds and flavonoids than the Mundo Novo 376/4 extract. Both cultivars contained gallic, chlorogenic and caffeic acids; however, the highest contents were quantified in the Iapar-59 cultivar. The leaf extracts from the Iapar-59 cultivar exhibited higher antioxidant activity. Higher concentrations of gallic, caffeic and chlorogenic acids and the presence of vanillin were detected in the extract of cultivar Iapar-59 inoculated with P. syringae pv. garcae.

Seasonal Variation of Chemical Composition and Antioxidant Activity of Essential Oil from Pistacia atlantica Desf. Leaves

2009 ◽  
Vol 87 (2) ◽  
pp. 157-166 ◽  
Author(s):  
Nadhir Gourine ◽  
Mohamed Yousfi ◽  
Isabelle Bombarda ◽  
Boubakeur Nadjemi ◽  
Emile Gaydou
Keyword(s):  
Antioxidant Activity ◽  
Seasonal Variation ◽  
Chemical Composition ◽  
Essential Oil ◽  
Pistacia Atlantica

scholarly journals Effect of seasonal variation on the chemical composition and antioxidant and antifungal activities of Convolvulus althaeoides L. leaf extracts

2020 ◽  
Vol 13 (6) ◽  
pp. 5651-5668 ◽  
Author(s):  
Soukaina Hrichi ◽  
Raja Chaabane-Banaoues ◽  
Daniele Giuffrida ◽  
Domenica Mangraviti ◽  
Yassine Oulad El Majdoub ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Chemical Composition ◽  
Leaf Extracts ◽  
Antifungal Activities

scholarly journals Chemical Composition and In Vitro Antioxidant and Antimicrobial Activities of Marrubium vulgare L.

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Ibrahim Mssillou ◽  
Abdelkrim Agour ◽  
Noureddine Hamamouch ◽  
Badiaa Lyoussi ◽  
Elhoussine Derwich
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Chemical Composition ◽  
Antimicrobial Activities ◽  
Total Phenolic ◽  
Leaf Extracts ◽  
Total Antioxidant ◽  
Marrubium Vulgare ◽  
Antioxidant And Antimicrobial Activities

In this study, the polyphenol content and the antioxidant and antimicrobial activities of hydroethanolic (MVE) and hydroacetonic (MVA) leaf extracts of Marrubium vulgare L. were examined. The results indicated that the total phenolic content was higher in MVA (112.09 ± 4.77 mg GAE/DW) compared to MVE extract (98.77 ± 1.68 mg GAE/DW). The total flavonoid content was also higher in MVA extract (21.08 ± 0.38 mg QE/g DW) compared to MVE (17.65 ± 0.73 mg QE/g DW). Analysis of the chemical composition revealed the presence of 13 compounds with a total of 96.14%, with the major compound being malic acid (22.57%). Both extracts possess a good total antioxidant activity. DPPH and FRAP assays indicated that the MVE extract possesses a better antioxidant activity, with IC50 = 52.04 µg/mL ± 0.2 and EC50 of 4.51 ± 0.5 mg/mL, compared to MVA extract (IC50 = 60.57 ± 0.6 µg/mL and EC50 of 6.43 ± 0.0411 mg/mL). Moreover, both extracts exhibited strong antimicrobial activity against certain nosocomial strains as indicted by the MIC values, which ranged between 0.93 mg/mL and 10 mg/mL. Taken together, these results reveal the importance of M. vulgare as a natural antioxidant with important antimicrobial activity.

scholarly journals Seasonal Variation in the Chemical Composition, Antioxidant Activity and Total Phenolic Content of Teucrium persicum Boiss. Essential Oils

2010 ◽  
Vol 5 (7) ◽  
pp. 492-498 ◽  
Author(s):  
Hamid Reza Monsef-Esf ◽  
Abdolhossein Miri ◽  
Mohsen Amini ◽  
Yaghoub Amanzadeh ◽  
Abbas Hadjiakhoo ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Seasonal Variation ◽  
Chemical Composition ◽  
Essential Oils ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic
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