Next Article in Journal
Optimizing the Extraction of Anti-tumor Polysaccharides from the Fruit of Capparis spionosa L. by Response Surface Methodology
Previous Article in Journal
Antioxidant Activity of Various Parts of Cinnamomum cassia Extracted with Different Extraction Methods
Article

Impact of Soil Field Water Capacity on Secondary Metabolites, Phenylalanine Ammonia-lyase (PAL), Maliondialdehyde (MDA) and Photosynthetic Responses of Malaysian Kacip Fatimah (Labisia pumila Benth)

Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, Serdang 43400, Selangor, Malaysia
*
Author to whom correspondence should be addressed.
Molecules 2012, 17(6), 7305-7322; https://doi.org/10.3390/molecules17067305
Received: 7 May 2012 / Revised: 7 June 2012 / Accepted: 11 June 2012 / Published: 13 June 2012
A randomized complete block design 2 × 4 experiment was designed and conducted for 15 weeks to characterize the relationships between production of total phenolics, flavonoid, anthocyanin, leaf gas exchange, total chlorophyll, phenylalanine ammonia-lyase (PAL) and malondialdehyde (MDA) activity in two varieties of Labisia pumila Benth, namely the var. alata and pumila, under four levels of evapotranspiration replacement (ER) (100%; well watered), (75%, moderate water stress), (50%; high water stress) and (25%; severe water stress). The production of total phenolics, flavonoids, anthocyanin, soluble sugar and relative leaf water content was affected by the interaction between varieties and SWC. As the ER levels decreased from 100% to 25%, the production of PAL and MDA activity increased steadily. At the highest (100%) ER L. pumila exhibited significantly higher net photosynthesis, apparent quantum yield, maximum efficiency of photosystem II (fv/fm) and lower dark respiration rates compared to the other treatment. The production of total phenolics, flavonoids and anthocyanin was also found to be higher under high water stress (50% ER replacement) compared to severe water stress (25% ER). From this study, it was observed that as net photosynthesis, apparent quantum yield and chlorophyll content were downregulated under high water stress the production of total phenolics, flavonoids and anthocyanin were upregulated implying that the imposition of high water stress can enhance the medicinal properties of L. pumila Benth. View Full-Text
Keywords: photosynthetic capacity; evapotranspiration replacements; total phenolics and flavonoids; anthocyanins; soluble sugar; lipid peroxidation activity photosynthetic capacity; evapotranspiration replacements; total phenolics and flavonoids; anthocyanins; soluble sugar; lipid peroxidation activity
Show Figures

Figure 1

MDPI and ACS Style

Jaafar, H.Z.E.; Ibrahim, M.H.; Mohamad Fakri, N.F. Impact of Soil Field Water Capacity on Secondary Metabolites, Phenylalanine Ammonia-lyase (PAL), Maliondialdehyde (MDA) and Photosynthetic Responses of Malaysian Kacip Fatimah (Labisia pumila Benth). Molecules 2012, 17, 7305-7322. https://doi.org/10.3390/molecules17067305

AMA Style

Jaafar HZE, Ibrahim MH, Mohamad Fakri NF. Impact of Soil Field Water Capacity on Secondary Metabolites, Phenylalanine Ammonia-lyase (PAL), Maliondialdehyde (MDA) and Photosynthetic Responses of Malaysian Kacip Fatimah (Labisia pumila Benth). Molecules. 2012; 17(6):7305-7322. https://doi.org/10.3390/molecules17067305

Chicago/Turabian Style

Jaafar, Hawa Z. E., Mohd Hafiz Ibrahim, and Nur Farhana Mohamad Fakri. 2012. "Impact of Soil Field Water Capacity on Secondary Metabolites, Phenylalanine Ammonia-lyase (PAL), Maliondialdehyde (MDA) and Photosynthetic Responses of Malaysian Kacip Fatimah (Labisia pumila Benth)" Molecules 17, no. 6: 7305-7322. https://doi.org/10.3390/molecules17067305

Find Other Styles

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop