Phenolics and Flavonoids Compounds, Phenylanine Ammonia Lyase and Antioxidant Activity Responses to Elevated CO2 in Labisia pumila (Myrisinaceae)

摘要: A split plot 3 × experiment was designed to examine the impact of three concentrations CO2 (400, 800 and 1,200 µmol·mol−1) on phenolic flavonoid compound profiles, phenylalanine ammonia lyase (PAL) antioxidant activity in varieties Labisia pumila Benth. (var. alata, lanceolata) after 15 weeks exposure. HPLC analysis revealed a strong influence increased concentration modification whose intensity depended interaction between levels L. varieties. Gallic acid quercetin were most abundant phenolics flavonoids commonly present all With elevated (1,200 exposure, gallic tremendously, especially var. alata (101–111%), whilst large increase noted lanceolata (260%), followed closely by (201%). Kaempferol, although detected under ambient conditions, undetected Instead, caffeic enhanced tremendously (338~1,100%) (298~433%). Meanwhile, pyragallol rutin only seen (810 µg·g−1 DW) (25 DW), respectively, conditions; but former went while continued 262% enrichment. Interestingly, naringenin that conditions enrichment, except for where it 1,100%. PAL activity, DPPH FRAP also with increasing implying possible improvement health-promoting quality Malaysian high enrichment conditions.