yield, postharvest transpiration, color, chemical composition, and antioxidant activity. Materials and Methods The study was conducted at the Horticulture Farm, University of Georgia (UGA), Tifton, GA, during the spring seasons of 2015 and 2016. The soil
Juan Carlos Díaz-Pérez, Kelly St. John, Mohammad Yamin Kabir, J. Alberto Alvarado-Chávez, Ania M. Cutiño-Jiménez, Jesús Bautista, Gunawati Gunawan, and Savithri U. Nambeesan
Pavlos Tsouvaltzis, Angelos Deltsidis, and Jeffrey K. Brecht
innermost slices from each tuber were halved; thus, two pieces were obtained from each slice. Pieces were rinsed twice with deionized water for 30 s each. Moisture on the surface of the pieces was removed by blotting with paper towels, the color was measured
Thierry Pascal, Fred Pfeiffer, and Jocelyne Kervella
resistance to the green peach aphid ( Pascal et al., 2002 ), scored for red or green leaf color, and pruned before artificial inoculation by S. pannosa once they developed succulent shoots. Initially, the inoculum source derived from the populations endemic
Chen-Yi Hung, John R. Murray, Sarah M. Ohmann, and Cindy B.S. Tong
The color of red potato tubers is due to an accumulation of anthocyanins in periderm and peripheral cortex tissues. The objective of this study was to characterize changes in anthocyanin content and tuber surface color during tuber development. Using the red tuber-producing potato (Solanum tuberosum L.) cultivar Norland, we observed that chroma (intensity of redness) and anthocyanin content per unit of surface area of greenhouse-grown tubers decreased as tuber weight increased. There was no increase in hue (tint) during the same developmental periods. Using high-performance liquid chromatography (HPLC), we determined that pelargonidin and peonidin are the major anthocyanidins (aglycones of anthocyanins) in the tuber periderm. Northern blot analyses indicated that steady-state mRNA levels of dihydroflavonol reductase (DFR), an anthocyanin biosynthetic enzyme, continued throughout tuber development. These results suggest that anthocyanins are synthesized throughout tuber development, and that cell division and/or enlargement contribute to a decline in chroma and anthocyanin concentration.
Jing Huang, Ya-liang Xu, Fa-min Duan, Xu Du, Qi-chang Yang, and Yin-jian Zheng
) than under the 1-, 2-, and 4-h treatments. As the time of alternating red and blue light increased, the plant canopy of two-leaf-color pak choi became much more compact. The maximum leaf size was observed in the 1-h treatment, and the minimum leaf size
Esnath T. Hamadziripi, Karen I. Theron, Magdalena Muller, and Willem J. Steyn
aesthetic and from a quality-signaling perspective has an important function in consumer acceptability ( Steyn, 2012 ). Hence, peel color is an important quality attribute in determining consumer acceptance of apples ( Telias et al., 2011 ). The red color in
Walter Boswell, Bernard Bible, and Suman Singha
Fruit of 34 peach (Prunus persica L. Batsch). cultivars were harvested at maturity and visually evaluated by panelists on a 1 to 10 scale, where 10 = excellent color. CIELAB coordinates (L* a* b*) of fruit color were measured at the midpoint between the stem and the calyx end with a Minolta CR-200b calorimeter on the blushed and ground areas of each fruit. Simple linear regressions of color coordinates with panel ratings indicated that blush chroma, blush L*, blush hue angle and E* (total color difference between ground and blush) all influence visual color evaluation. Not only does assessing fruit color with a calorimeter permit color to be reported in internationally accepted units, but the relationships indicate that instrumental values relate well to qualitative ratings.
Aparna Gazula, Matthew D. Kleinhenz, Joseph C. Scheerens, and Peter P. Ling
Although nutritional value, texture, size, shape, flavor, and freedom from defects are major indicators of lettuce crop quality ( Arthey, 1975 ), leaf color is particularly important because it is often the first trait that registers with
Melvin R. Hall
In 1983-1987, a Gardner color difference meter standardized to a pink tile (L=70.5, a=+23.9, b=+9.3) and equipped with an aperture of 3.8 cm (1983-1986), 1.9 cm (1987), or 1.0 cm (1988-1989) was used to measure lightness (L) and intensity (chroma) of `Georgia Red' sweetpotato [Ipomoea batatas (L.) Lam.] seed roots cut into longitudinal sections. Individual roots were selected with good color when L<68 and chroma≥39 and fair color when L≥72 and chroma <35 (1983-1985), L<65 and chroma≥42 for good color and L≥80 and chroma <25 for fair color (1986), L≤66 and chroma≥41 for good color and L≥85 and chroma≤20 for fair color (1987). In each year, roots falling between the defined selection values were discarded. In 1988, root sections from a common 1983-ancestor parent root were bulked for plant propagation if L and chroma values were similar. Subsequent measurements of these bulk populations were made in 1989. Measurements by a color difference meter were helpful in making objective judgements in selecting for internal color of sweetpotato. Also, these measurements were helpful in following changes in internal color through several generations of vegetative propagation.
Jing-jing Zhao, Xun Chen, Li-juan Fan, and Ling Wang
et al., 2014 ; Shang and Wang, 2014 ). Wild resources of I. sanguinea are abundant, but the color is mainly blue violet ( Wang et al., 2016 ). Therefore, the improvement of flower color has become one of the interests in breeding of I. sanguinea