scholarly journals Effect of cultivar, flesh colour, locality and year on carotenoid content in potato tubers

2016 ◽  
Vol 62 (No. 2) ◽  
pp. 86-91 ◽  
Author(s):  
K. Hamouz ◽  
K. Pazderů ◽  
J. Lachman ◽  
J. Čepl ◽  
Z. Kotíková
Keyword(s):  
Carotenoid Content ◽  
Potato Tubers ◽  
Flesh Colour

scholarly journals Effect of cultivar, flesh colour, location and year of cultivation on the glycoalkaloid content in potato tubers

2014 ◽  
Vol 60 (No. 11) ◽  
pp. 512-517 ◽  
Author(s):  
K. Hamouz ◽  
K. Pazderů ◽  
J. Lachman ◽  
M. Orsák ◽  
V. Pivec ◽  
...  
Keyword(s):  
Human Health ◽  
Decisive Role ◽  
Field Trials ◽  
Potato Field ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Fresh Matter ◽  
Total Glycoalkaloids ◽  
Different Altitudes

In the three-year field trials (2009–2011) at two locations with different altitudes a total of 14 potato cultivars with different colour of flesh (yellow, white, red and purple) were grown. The content of total glycoalkaloids (TGA) was determined by HPLC. TGA content ranged from 18.8 to 102.4 mg/kg fresh matter and none of the cultivars reached the value of risk to human health. Conclusive and decisive influence on the content of the TGA was recorded in genotype. Individual cultivars reached 0.47 to 1.45 of the TGA content in the control cv. Agria. In terms of the colour of the flesh the highest TGA content was found in group of red-fleshed cultivars (1.53 × higher than the average of cultivars with yellow or white flesh); while red-fleshed cv. Rote Emma reached the absolutely lowest TGA content of 14 cultivars, which confirms the decisive role of genotype. On warm, dry habitats in the lowlands a higher TGA content was observed when compared with the amount raised in a typical potato field.

scholarly journals Effect of genotype, flesh colour and environment on the glycoalkaloid content in potato tubers from integrated agriculture

2018 ◽  
Vol 64 (No. 4) ◽  
pp. 186-191 ◽  
Author(s):  
Urban Jaroslav ◽  
Hamouz Karel ◽  
Lachman Jaromír ◽  
Pulkrábek Josef ◽  
Pazderů Kateřina
Keyword(s):  
Weather Conditions ◽  
Russet Burbank ◽  
Potato Cultivars ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Fresh Matter ◽  
Glycoalkaloid Content ◽  
Integrated Agriculture ◽  
Total Glycoalkaloids ◽  
Safety Limit

The main aim of the study was evaluation of the content of -solanine, -chaconine and total glycoalkaloids (TGA) in fourteen new potato cultivars with purple and red flesh in comparison with yellow- and white-fleshed control potatoes cultivated in a friendly way in integrated agriculture. The results were obtained from three-year trials on two locations. TGA levels in tubers’ flesh ranged from 33.69 to 167.77 mg/kg fresh matter (FM), and the ratio of α-chaconin to α-solanin from 1.18 to 3.78. No TGA safety limit was exceeded for any cultivar. The glycoalkaloids content was not significantly influenced by flesh colour, whereas the cultivar genotype had a decisive influence on their content. Eight cultivars with coloured flesh yielded a more favourable lower TGA content in comparison with the yellow-fleshed control cv. Agria (86.3 mg/kg FM); on the contrary six cultivars showed higher TGA values. The highest average TGA content was found in the purple-fleshed Bora Valley cultivar (165 mg/kg FM), the lowest was found in the red-fleshed Red Emmalie cultivar (43.6 mg/kg FM), whereas the white-fleshed cv. Russet Burbank reached 67.0 mg/kg FM. The glycoalkaloid content was significantly affected by location and year weather conditions.

scholarly journals Influence of weather conditions on the physicochemical characteristics of potato tubers

2018 ◽  
Vol 64 (No. 7) ◽  
pp. 317-323 ◽  
Author(s):  
Escuredo Olga ◽  
Seijo-Rodríguez Ana ◽  
M. Shantal Rodríguez-Flores ◽  
Míguez Montserrat ◽  
M. Carmen Seijo
Keyword(s):  
Principal Component ◽  
Weather Conditions ◽  
Physicochemical Characteristics ◽  
Soluble Solids ◽  
Correct Selection ◽  
Carotenoid Content ◽  
Potato Tubers ◽  
Flavonoid Content ◽  
North West ◽  
Selection Of

Physicochemical properties of the tuber as a commercial product differ according to environmental conditions of the area and the growing season. The knowledge about how weather affects these characteristics, allows estimating the correct selection of the cultivars in order to obtain the highest yields or desired physicochemical qualities. In this sense, the effect of the main meteorological factors on the physicochemical characteristics (size, texture, dry matter, soluble solids, phenols, flavonoids, carotenoids and inhibitor concentration (IC<sub>50</sub>)) of 8 potato cultivars growing in A Limia (North-West Spain) was analysed. The study was conducted during three consecutive years (2014–2016) and the results presented significant differences in the analyzed parameters between years (P &lt; 0.05). Spearman’s correlations and principal component analysis showed that the tubers of 2014 (with colder weather conditions) had the highest phenol content and the lowest flavonoids and carotenoids content. Therefore, the temperature positively favoured the flavonoid content and carotenoid content (samples from 2016), although the size of potato tubers was considerably smaller.

scholarly journals Ascorbic acid content in potato tubers with coloured flesh as affected by genotype, environment and storage

2018 ◽  
Vol 64 (No. 12) ◽  
pp. 605-611
Author(s):  
Karel Hamouz ◽  
David Bečka ◽  
Ivana Capouchová
Keyword(s):  
Ascorbic Acid ◽  
Ascorbic Acid Content ◽  
The Other ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Fresh Matter ◽  
Tuber Flesh ◽  
Yellow Flesh ◽  
And Storage ◽  
Genotype A

The aim of the study was to evaluate the effect of genotype, tuber flesh colour, site conditions, year of cultivation and storage on the content of ascorbic acid (AAC) in the tubers of twelve potato cultivars with coloured flesh, compared with the yellow-flesh cv. Agria. AAC ranged from 88.6 to 282.0 mg/kg fresh matter (FM) and it was significantly influenced by genotype. A significantly highest AAC, on a three-year average, was achieved by cv. Rosemarie with red flesh (218.9 mg/kg FM; 1.10–1.84-fold more than the other cultivars). Position number two was achieved by the control cv. Agria (199.4 mg/kg FM). The purple or red colour of the cultivars with coloured flesh did not have a significant effect on the AAC. A significantly higher (1.17 times) AAC was determined at the Uhříněves site with warmer climate and drier weather before the harvest, compared with the other site in Valečov. The AAC was also significantly affected by year of cultivation. Cold storage (4°C, 180 days) resulted in a significant decrease in AAC, which varied in dependence on the genotype of the cultivars (34.6% to 65.1%). However, no link to the colour of the tuber flesh was found.

scholarly journals Differences in anthocyanin content and antioxidant activity of potato tubers with different flesh colour

2011 ◽  
Vol 57 (No. 10) ◽  
pp. 478-485 ◽  
Author(s):  
K. Hamouz ◽  
J. Lachman ◽  
K. Pazderů ◽  
J. Tomášek ◽  
K. Hejtmánková ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Field Trials ◽  
Anthocyanin Content ◽  
Potato Tubers ◽  
Flesh Colour ◽  
Total Anthocyanin ◽  
The Czech Republic ◽  
Total Anthocyanin Content ◽  
Lowland Area

The aim of this study was to determine that the total anthocyanin content (TAC) and antioxidant activity (AOA) in potato flesh with different colours grown in the Czech Republic. Four yellow- or white-, six purple- and four red-fleshed varieties were grown in 2009 at two different sites (Valečov &ndash; highland, seed potato area at 460 m a.s.l., Přerov nad Labem &ndash; lowland, new potatoes area at 178 m a.s.l.) in precise field trials. For purple- and red-fleshed varieties, average TAC values ranged from 61.5 to 573.5 cyanidin mg/kg of FM and significant effect of the variety of the TAC was found. High content reached the Violette and Vitelotte varieties with dark purple flesh, and the lowest content the Blue Congo variety with light purple marbled flesh. Significantly higher TAC was found in a lowland area Přerov nad Labem, which is probably related to drought stress. The lowest AOA was achieved by a group of varieties with yellow or white flesh &ndash; averaging 82.8 mg ascorbic acid equivalent/kg FM, in a group of red-fleshed varieties it was higher 4.34 times and in a group of purple-fleshed varieties even 5.03 times higher. Also between purple-and red-fleshed varieties significant differences in AOA were found, both high and low values of AOA showed the same varieties as in the case of the TAC. Among experimental sites higher AOA was also demonstrated at Přerov nad Labem. Correlation analysis showed a strong correlation between AOA and TAC (r = 0.8099).

Influence of flesh colour, year and growing area on carotenoid and anthocyanin content in potato tubers

2013 ◽  
Vol 32 (1) ◽  
pp. 20-27 ◽  
Author(s):  
Kateřina Hejtmánková ◽  
Zora Kotíková ◽  
Karel Hamouz ◽  
Vladimír Pivec ◽  
Josef Vacek ◽  
...  
Keyword(s):  
Anthocyanin Content ◽  
Potato Tubers ◽  
Flesh Colour

scholarly journals Effect of selected factors on total carotenoid content in potato tubers (Solanum tuberosum L.)

2008 ◽  
Vol 53 (No. 8) ◽  
pp. 355-360 ◽  
Author(s):  
Z. Kotíková ◽  
A. Hejtmánková ◽  
J. Lachman ◽  
K. Hamouz ◽  
E. Trnková ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Potato Variety ◽  
Field Trials ◽  
Polypropylene Fibre ◽  
Carotenoid Content ◽  
Early Potato ◽  
Total Carotenoid ◽  
Potato Tubers ◽  
High Tc ◽  
Total Carotenoid Content

In the years 2004 and 2005 precise field trials were performed with the aim to evaluate the effect of variety, year of cultivation, N, P, K and Mg fertilization, and the cover with white propylene fibre Paegas-Agro UV 17 on the total carotenoid content (TC) in potato tubers. TC was determined by absorption UV-VIS spectrophotometry and obtained results were statistically evaluated (ANOVA and MANOVA variance analyses, Scheffe’s test). Statistically significant differences (<i>P</i> = 0.05) in the ability of varieties to synthesize carotenoids were found (Karin, Agria and Marabel with high TC × Impala and Saturna with low TC) and also the year of cultivation significantly affected TC (5.8 mg/kg fw in 2004, 20.9 mg/kg fw in 2005). The effect of fertilization with N, P, K and Mg on TC in potatoes did not show any significant effect; however significant differences were observed among varieties. The effect of white polypropylene fibre in two early potato varieties (Adora and Impala) during three dates of harvest on TC in potato tubers was not significant. Contrariwise, statistically significant effects on TC were reported in the case of potato tubers maturity, year of cultivation and potato variety.

Carotenoid content of the flower of tansy (Tanacetum vulgare L.)

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
G Horváth ◽  
E Turcsi ◽  
P Molnár ◽  
LG Szabó ◽  
J Deli
Keyword(s):  
Carotenoid Content ◽  
Tanacetum Vulgare
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