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Kelly Ross, Gerry Neilsen and Denise Neilsen

objective of this study was to determine the effects of irrigation frequency, P fertigation, and cultivar (Skeena and Cristalina) on the size (quality parameter) and levels of different types of phenolic compounds (total phenolics, tartaric esters, flavonols

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Archana P. Pant, Theodore J.K. Radovich, Nguyen V. Hue and Susan C. Miyasaka

and total phenolics were analyzed on lyophilized samples of each treatment by extracting 100 mg in 20 mL of ethanol:acetone (1:1, v:v) in glass vials ( Gross, 1991 ). All data were reported based on the dry weight of the lyophilized sample. Extracts

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Pavlina D. Drogoudi, Constantinos Tsipouridis and Zisis Michailidis

Twenty pomegranate (Punica granatum L.) accessions were collected from different regions in northern Greece and evaluated under uniform conditions for leaf dimensions, frost resistance, and fruit physical and chemical characteristics, such as the juice antioxidant activity [ascorbate equivalent antioxidant activity (AEAC)], using the radical DPPH, ascorbic acid, total phenolic and total anthocyanin contents. Considerable variation in the characteristics studied was found and valuable pomological traits were exhibited. Cluster analysis produced cases of homonymy between some accessions. Principal component analyses showed that the component explaining the greatest variability positively correlated with percent juice, fruit chroma, AEAC, total anthocyanins, and soluble solids content (SSC), but negatively correlated with fruit fresh weight (FW), fruit and seed hue angle (less red color), total acidity, and leaf dimensions. Fruit size was positively correlated with acidity, while acidity was negatively correlated with SSC. Skin thickness and FW were correlated with fruit hue angle and chroma, suggesting that red color may better develop in thick-skinned and/or small-sized pomegranates. Total anthocyanin content was negatively correlated with FW and fruit hue angle. AEAC was positively correlated with total anthocyanin and ascorbic acid contents, the latter one constituted a 15% contribution to AEAC. The associations found among physical and chemical traits suggest that consumers interested in a healthier produce should be directed to small and red pomegranates.

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Kang Mo Ku and John A. Juvik

exogenous treatments of elicitors including jasmonic acid and salicylic acid to mimic biotic stress and increase tissue total phenolics and flavonoid concentrations. Several reports have attempted to enhance antioxidant, antiproliferative, and antiadipogenic

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Malkeet S. Padda and D.H. Picha

were cooled and centrifuged at 4500 g n for 15 min. The clear supernatant was decanted and brought to a final volume of 10 mL and analyzed for total phenolic content, individual phenolic acids content, and antioxidant activity. Total phenolics

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Xin Zhao, Edward E. Carey, Janice E. Young, Weiqun Wang and Takeo Iwamoto

influences lettuce phenolics. Total phenolics in iceberg lettuce increased by 25.0% and 23.3% in outer and inner leaves, respectively, during 2 weeks storage at 4 °C ( Zhang and Hamauzu, 2003 ). However, interactions among genotype, preharvest, and

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Christina M. Bavougian, Paul E. Read, Vicki L. Schlegel and Kathryn J. Hanford

, Holt et al. (2008a , 2008b ) demonstrated that increased total phenol, tannin, and anthocyanin concentrations in must did not have an effect on wine quality scores. A majority of the research on phenolic compounds has focused on their positive effects

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Justine E. Vanden Heuvel and Wesley R. Autio

total phenolics (TP) in ‘Early Black’ cranberries. Materials and Methods Seven bogs of ‘Early Black’ cranberries intended for dry harvest were selected before bloom in 2005 for the 2-year experiment. Dry-harvested bogs were selected so that upright

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Myung-Min Oh, Edward E. Carey and C.B. Rajashekar

/Fm ratio (potential quantum yield) was measured during the day using the saturation pulse method after 30 min of dark adaptation. Three plants were used for each measurement. Total phenolic concentration. Lettuce leaves were collected every 3 or 4 d

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Shiow Y. Wang and Kim S. Lewers

. Fragaria (strawberry) cultivars, selections, and wild genotypes grown on the north farm of the Henry A. Wallace Agricultural Research Center at Beltsville, MD, and evaluated for antioxidant activity, total phenolics, anthocyanin, and flavonoid content