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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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Related in: MedlinePlus

Different development stages of loquat flowers. The four developmental stages of loquat flowers were divided according to the flower opening degree (i.e., stage 1, flower bud; stage 2, the flower is partially open; stage 3, the flower is fully open; stage 4, the petals of the flower have fallen off).
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f1-ijms-12-02935: Different development stages of loquat flowers. The four developmental stages of loquat flowers were divided according to the flower opening degree (i.e., stage 1, flower bud; stage 2, the flower is partially open; stage 3, the flower is fully open; stage 4, the petals of the flower have fallen off).

Mentions: The composition of bioactive components and antioxidant capacity in the plant were significantly affected by the developmental stages [30–32]. The effects of developmental stages (Figure 1) on the flavonoids, phenolics contents and antioxidant capacity in loquat flower were similar to that on amygdalin content [22]. Flower at stage 3 contained the highest flavonoid and phenolic content (3.01 ± 0.13 and 13.53 ± 0.38 mg/g DW, respectively) and showed strongest antioxidant capacity with different assays. Flavonoid and phenolic content and antioxidant capacity of flowers at stage 3 were significantly different to those at the other three stages, and were followed by flowers at stage 2. Flowers at stage 1 and stage 4 contained lower flavonoid and phenolic content, and had lower antioxidant capacities (Table 3). Therefore, it is suggested that the best harvesting time for loquat flowers may be between stage 2 and stage 3 for utilization of its flavonoids and phenolics.


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)

Different development stages of loquat flowers. The four developmental stages of loquat flowers were divided according to the flower opening degree (i.e., stage 1, flower bud; stage 2, the flower is partially open; stage 3, the flower is fully open; stage 4, the petals of the flower have fallen off).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f1-ijms-12-02935: Different development stages of loquat flowers. The four developmental stages of loquat flowers were divided according to the flower opening degree (i.e., stage 1, flower bud; stage 2, the flower is partially open; stage 3, the flower is fully open; stage 4, the petals of the flower have fallen off).
Mentions: The composition of bioactive components and antioxidant capacity in the plant were significantly affected by the developmental stages [30–32]. The effects of developmental stages (Figure 1) on the flavonoids, phenolics contents and antioxidant capacity in loquat flower were similar to that on amygdalin content [22]. Flower at stage 3 contained the highest flavonoid and phenolic content (3.01 ± 0.13 and 13.53 ± 0.38 mg/g DW, respectively) and showed strongest antioxidant capacity with different assays. Flavonoid and phenolic content and antioxidant capacity of flowers at stage 3 were significantly different to those at the other three stages, and were followed by flowers at stage 2. Flowers at stage 1 and stage 4 contained lower flavonoid and phenolic content, and had lower antioxidant capacities (Table 3). Therefore, it is suggested that the best harvesting time for loquat flowers may be between stage 2 and stage 3 for utilization of its flavonoids and phenolics.

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