Detecção molecular de fitoplasmas em plantas do gênero Celosia com malformação das folhas

Eckstein, Bárbara; Bedendo, Ivan Paulo

doi:10.1590/s0100-54052010000100017

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“…Native of African and Asian continents and belonging to the family Amaranthaceae A. Juss, the genus comprises 60 species distributed in areas of tropical and subtropical climates. Among those introduced in the Brazilian territory is Celosia argentea Linn, an herbaceous highly consumed due to its high nutritional value and used as an ornamental plant [4,5]. In traditional medicine, it is applied to treat diabetes, inflammation, fever, gastroenteritis, and leukorrhea [6].…”

Section: Introductionmentioning

confidence: 99%

Phytochemical analysis and antimicrobial and antioxidant activities of Celosia argentea leaves

Neto¹,

Santana²,

Sena³

et al. 2021

Sci. Plena

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This study performed the phytochemical screening and bioactivity of Celosia argentea leaves. The phytochemical profile of hexane (Hex), ethyl acetate (AcOEt) and methanolic (MeOH) extracts of C. argentea leaves was observed by Thin Layer Chromatography and spectrophotometric analysis. In the susceptibility test, the disk-diffusion technique was performed. Minimum Inhibitory Concentration (MIC) was assessed by microdilution. Minimum Microbic Concentration (MMC) was determined in the extracts which presented MIC. Antioxidant activities were measured using 2,2-diphenyl-1-picril-hidrazil (DPPH), determination of reducing power and total antioxidant capacity (TAC). The results showed a higher content of phenolic compounds (252.02 ± 0.02 mg GAE/g) in the extract AcOEt, and of tannins (103.72 ± 0.004 mg/EAT/g) in MeOH; this was effective against Micrococcus luteus (inhibition of 24.7 ± 0.6 mm). MIC and CMM of the AcOEt for M. luteus were 0.06 and 0.25 mg/mL, respectively. The MeOH extract eliminated 70.4 ± 0.03% of DPPH radical, whereas AcOEt had greater reducing power (289.23 ± 0.05 mg AA/g) and TAC at a concentration of 250 µg/mL (89.6%). This study revealed that C. argentea has phytochemicals with bactericidal and fungicidal potential, in addition to elevated antioxidant power. Key words: antimicrobial, antioxidant, bioactivity.

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Section: Introductionmentioning

confidence: 99%