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首页> 外文期刊>Australian Journal of Crop Science >Light intensity effects on production and antioxidant activity of flavonoids and phenolic compounds in leaves, stems and roots of three varieties of Labisia pumila Benth
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Light intensity effects on production and antioxidant activity of flavonoids and phenolic compounds in leaves, stems and roots of three varieties of Labisia pumila Benth

机译：光照强度对三个拉比西亚矮胖豆叶，茎和根中黄酮和酚类化合物的生产和抗氧化活性的影响

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This research was performed to evaluate the effect of light intensity (310 and 630 μmol m?2s?1) on production and antioxidant activity of flavonoids and phenolic compounds from the leaves, stems and roots in three varieties of Labisia pumila Benth. The experiment was carried out base on randomized complete block design with a factorial arrangement. The results revealed that total phenolic and flavonoid content as well as antioxidant activity in all three varieties had consistently higher values when exposed to high irradiance (70% IR). The highest amount of these components was accumulated in the leaves followed by the roots and stems in all three varieties. The results showed that total flavonoid accumulation was highest in the leaves of L. pumila var pumila (2.94±0.11 mg rutin equivalent /g DW) under 630 μmol m?2s?1 light intensity and total phenolics was highest in L. pumila var alata (3.92±0.06 mg Galic acid equivalent (GAE)/g DW) under the same light intensity. HPLC analyses of phenolics and flavonoids in all three varieties revealed the presence of gallic acid, caffeic acid, kaempferol, naringin and myricetin in the leaves of all three varieties of L. pumila Benth and these compounds increased under 630 μmol m?2s?1 light intensity. Antioxidant activities determined by 1,1- Diphenyl-2-picryl-hydrazyl (DPPH) and ferric reduction antioxidant power (FRAP) assays in all varieties. The results showed significantly (p ≤ 0.05) higher activity with increasing total phenolics and flavonoids in all plant organs under 630 μmol m?2s?1 light intensity compared to 310 μmol m?2s?1. This study indicates the ability of different light intensities to enhance the secondary metabolites such as flavonoid and phenolic compounds as well as their antioxidant activities in all three varieties of L. pumila Benth.
机译：进行了这项研究，以评估光强度（310和630μmolm？2s？1）对3个拉比西亚pumila Benth叶片，茎和根中黄酮类化合物和酚类化合物的产生和抗氧化活性的影响。该实验是在基于因子安排的随机完整块设计的基础上进行的。结果显示，当暴露于高辐照度（70％红外）下时，所有三个品种的总酚和类黄酮含量以及抗氧化活性始终较高。这些成分最多的是在叶片中积累，然后是所有三个品种的根和茎。结果表明，在630μmolm？2s？1光照强度下，L。pumila var pumila叶片中总黄酮含量最高（2.94±0.11 mg芦丁当量/ g DW），总酚含量最高。 （3.92±0.06 mg没食子酸当量（GAE）/ g DW）在相同的光强度下。所有三个品种中酚类和黄酮类化合物的HPLC分析表明，在L. pumila Benth的所有三个品种的叶片中都存在没食子酸，咖啡酸，山奈酚，柚皮苷和杨桃素，并且这些化合物在630μmolm？2s？1光下增加。强度。通过1,1-二苯基-2-吡啶-2-肼基（DPPH）和铁还原抗氧化能力（FRAP）分析测定的抗氧化活性。结果表明，在630μmolm？2s？1的光照强度下，与310μmolm？2s？1相比，所有植物器官中总酚和类黄酮的活性显着提高（p≤0.05）。这项研究表明不同的光强度增强次生代谢产物如类黄酮和酚类化合物的能力，以及它们在所有三个L. pumila Benth变种中的抗氧化活性。

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