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Flavonoids, phenolics, and antioxidant capacity in the flower of Eriobotrya japonica Lindl.

Zhou C, Sun C, Chen K, Li X - Int J Mol Sci (2011)

Bottom Line: Flavonoids and phenolics are abundant in loquat flowers.The contents of both bioactive components in flowers at different developmental stages and in the various flower tissues clearly differed, with the highest flavonoids and phenolics content in flowers of stage 3 (flower fully open) and petal, respectively.Correlation analysis showed that the ABTS method showed the highest correlation coefficients with flavonoids and phenolics, i.e., 0.886 and 0.973, respectively.

View Article: PubMed Central - PubMed

Affiliation: College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; E-Mail: chzhou@yzu.edu.cn.

ABSTRACT
Flavonoids and phenolics are abundant in loquat flowers. Methanol had the highest extraction efficiency among five solvents, followed by ethanol. Considering the safety and residue, ethanol is better as extraction solvent. The average content of flavonoids and phenolics of loquat flower of five cultivars were 1.59 ± 0.24 and 7.86 ± 0.87 mg/g DW, respectively, when using ethanol as extraction solvent. The contents of both bioactive components in flowers at different developmental stages and in the various flower tissues clearly differed, with the highest flavonoids and phenolics content in flowers of stage 3 (flower fully open) and petal, respectively. The antioxidant capacity was measured using FRAP, DPPH, and ABTS methods. The values of ABTS method was highest, followed by DPPH, the lowest was FRAP, when using vitamin C equivalent antioxidant capacity (VCEAC) as unit. Correlation analysis showed that the ABTS method showed the highest correlation coefficients with flavonoids and phenolics, i.e., 0.886 and 0.973, respectively.

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The correlation between VCEAC and different antioxidant capacity detection methods.
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f2-ijms-12-02935: The correlation between VCEAC and different antioxidant capacity detection methods.

Mentions: As shown in Figure 2, positive correlation (0.874 ≤ r2 ≤ 0.968) was found among antioxidant capacities determined by FRAP, DPPH and ABTS+ methods. The highest correlation (r2 = 0.968**) existed between antioxidant capacities obtained by FRAP and DPPH assays, while the lowest value (r2 = 0.874**) was found between antioxidant capacities obtained by FRAP and ABTS+ methods. The high relationship between antioxidant capacities measured by these three different methods was also investigated in other crops. Awika et al. [38] observed that antioxidant capacities in sorghums and their products determined by ABTS+ and DPPH assays were highly correlated. In the study of guava, Thaipong et al. [23] also found linear correlations between antioxidant capacities obtained from FRAP, DPPH, ABTS+ and ORAC (oxygen radical absorbance capacity) assays, with the highest correlation between FRAP and ABTS assays, and lowest between DPPH and ORAC assays.


Flavonoids, phenolics, and antioxidant capacity in the flower of Eriobotrya japonica Lindl.

Zhou C, Sun C, Chen K, Li X - Int J Mol Sci (2011)

The correlation between VCEAC and different antioxidant capacity detection methods.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC3116165&req=5

f2-ijms-12-02935: The correlation between VCEAC and different antioxidant capacity detection methods.
Mentions: As shown in Figure 2, positive correlation (0.874 ≤ r2 ≤ 0.968) was found among antioxidant capacities determined by FRAP, DPPH and ABTS+ methods. The highest correlation (r2 = 0.968**) existed between antioxidant capacities obtained by FRAP and DPPH assays, while the lowest value (r2 = 0.874**) was found between antioxidant capacities obtained by FRAP and ABTS+ methods. The high relationship between antioxidant capacities measured by these three different methods was also investigated in other crops. Awika et al. [38] observed that antioxidant capacities in sorghums and their products determined by ABTS+ and DPPH assays were highly correlated. In the study of guava, Thaipong et al. [23] also found linear correlations between antioxidant capacities obtained from FRAP, DPPH, ABTS+ and ORAC (oxygen radical absorbance capacity) assays, with the highest correlation between FRAP and ABTS assays, and lowest between DPPH and ORAC assays.

Bottom Line: Flavonoids and phenolics are abundant in loquat flowers.The contents of both bioactive components in flowers at different developmental stages and in the various flower tissues clearly differed, with the highest flavonoids and phenolics content in flowers of stage 3 (flower fully open) and petal, respectively.Correlation analysis showed that the ABTS method showed the highest correlation coefficients with flavonoids and phenolics, i.e., 0.886 and 0.973, respectively.

View Article: PubMed Central - PubMed

Affiliation: College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; E-Mail: chzhou@yzu.edu.cn.

ABSTRACT
Flavonoids and phenolics are abundant in loquat flowers. Methanol had the highest extraction efficiency among five solvents, followed by ethanol. Considering the safety and residue, ethanol is better as extraction solvent. The average content of flavonoids and phenolics of loquat flower of five cultivars were 1.59 ± 0.24 and 7.86 ± 0.87 mg/g DW, respectively, when using ethanol as extraction solvent. The contents of both bioactive components in flowers at different developmental stages and in the various flower tissues clearly differed, with the highest flavonoids and phenolics content in flowers of stage 3 (flower fully open) and petal, respectively. The antioxidant capacity was measured using FRAP, DPPH, and ABTS methods. The values of ABTS method was highest, followed by DPPH, the lowest was FRAP, when using vitamin C equivalent antioxidant capacity (VCEAC) as unit. Correlation analysis showed that the ABTS method showed the highest correlation coefficients with flavonoids and phenolics, i.e., 0.886 and 0.973, respectively.

Show MeSH
Related in: MedlinePlus