Effect of daily light integral treatments on free amino acids and sugars contributing flavor and acrylamide formation in potato tubers of Solanum tuberosum L.

To study the effect of photoperiodic conditions on the chemical composition of potato tubers, seven cultivars, grown under controlled conditions, were evaluated for the content of free amino acids (FAA) and sugars. The differences in these compounds may have an effect on the susceptibility of acrylamide formation during potato processing as well as on the flavor profile of potato products. Tubers were produced in growth chambers under two artificially induced photoperiods; 8 h light and 15 h light per day, resulting in conditions with two different daily light integral (DLI) levels. The photoperiodic treatments influenced the total FAA and free sugar contents and composition. Of the analyzed 19 FAAs, the concentrations of 14 FAAs were significantly lower in tubers exposed to the 15 h light period compared to 8 h light, whereas the glucose content was significantly higher. The total FAA concentrations were 15–46% lower and the glucose concentrations 6–64% higher in the seven cultivars exposed to the 15 h light conditions than in those grown in 8 h light.

Download Full-text

Free amino acids of potato tubers: a survey of published results set out according to potato variety

Potato Research ◽

10.1007/bf02362296 ◽

1977 ◽

Vol 20 (1) ◽

pp. 1-7 ◽

Cited By ~ 13

Author(s):

R. L. M. Synge

Keyword(s):

Amino Acids ◽

Potato Variety ◽

Free Amino Acids ◽

Free Amino ◽

Potato Tubers

Download Full-text

Free Amino Acids in Potato Tubers Altered by 2,4-D Treatment of Plants

Science ◽

10.1126/science.114.2956.204.b ◽

1951 ◽

Vol 114 (2956) ◽

pp. 204-205

Author(s):

Merle G. Payne ◽

Jess L. Fults ◽

Ruth J. Hay

Keyword(s):

Amino Acids ◽

Free Amino Acids ◽

Free Amino ◽

Potato Tubers

Download Full-text

Influence of Drought and Wounding Stress on Soluble Phenols and Proteins in Potato Tubers

Sustainable Agriculture Research ◽

10.5539/sar.v3n3p1 ◽

2014 ◽

Vol 3 (3) ◽

pp. 1 ◽

Cited By ~ 4

Author(s):

Christina B. Wegener ◽

Gisela Jansen ◽

Hans-Ulrich Jurgens

Keyword(s):

Amino Acids ◽

Drought Stress ◽

Water Supply ◽

Free Amino Acids ◽

Free Amino ◽

Potato Tubers ◽

Fresh Tissue ◽

Plant Phenols ◽

Wounding Stress ◽

Soluble Phenols

<p>Potato is a valuable source for phytochemicals like vitamins, minerals, plant phenols, amino acids and proteins. However, environmental stress may affect the level of all these components. In this study, two purple breeding clones and one yellow fleshed cultivar (cv.) were assessed in their response to drought and wounding stress in two consecutive years. The plants were grown in the greenhouse under control (sufficient water supply) and with drought stress conditions. After harvest the tubers were analyzed for the content of soluble phenols and proteins in fresh tissue and after wounding. In addition, free amino acids (AAS) and activity of lipid acyl hydrolases (LAH) were assayed in control and drought stressed tubers. The results revealed significant differences in soluble phenols and proteins between genotypes, and that drought stress significantly increased the level of soluble proteins (P < 0.0001) and LAH activity (P < 0.001), but had no significant effect on the concentration of phenols. Moreover, total amounts of free AAS were higher in the drought stress variant. Wounding stress caused a significant increase of soluble phenols in cv. Agave. But, this was less prominent in purple clones which in general had higher contents of phenols. Proteins were also enhanced as a result of wounding, although, the effect of wounding stress on their level was smaller than that of drought stress.<strong></strong></p>

Download Full-text

Effect of drought and waterlogging on saccharides and amino acids content in potato tubers

Plant Soil and Environment ◽

10.17221/661/2020-pse ◽

2021 ◽

Author(s):

Matyáš Orsák ◽

Zora Kotíková ◽

František Hnilička ◽

Jaromír Lachman

Keyword(s):

Amino Acids ◽

Drought Stress ◽

Free Amino Acids ◽

Free Amino ◽

Potato Tubers ◽

High Effect ◽

Total Free Amino Acids ◽

Effects Of Drought ◽

Tyrosine Content ◽

Total Amino Acids

The study was focused on the effect of drought and waterlogging stresses in two-year pot experiments in the peat substrate on the content of glucose, fructose and sucrose and free amino acids in potato tubers of four cultivars (yellow-fleshed Laura, Marabel, Milva and blue-fleshed Valfi) after 71 days of exposure to stresses conditions (BBCH 909). Drought and waterlogging increased levels of fructose, glucose, and sucrose in three potato cultivars except for cv. Laura. Drought stress increased l-proline (+248.4%), l-hydroxyproline (+135.3%), l-arginine (+29.97%), l-glutamic acid (+29.09%) and l-leucine (+22.58%) contents in all analysed cultivars. Moreover, the high effect of drought stress on an increase of l-phenylalanine, l-histidine, l-threonine, and total free amino acids content of the cvs. Laura, Valfi and Marabel has been observed. A comparison of the effects of drought and waterlogging stresses on the content of total amino acids showed an increase under drought and a decrease under waterlogging conditions. On average, of all cultivars, waterlogging stress caused an increase of l-tyrosine content, whereas drought stress decrease. In addition, drought stress caused a significant increase of l-proline in all cultivars while waterlogging its decrease. Obtained results confirmed different responses of susceptible or resistant cultivars to abiotic stresses.

Download Full-text