Bioactive compounds in potatoes: Accumulation under drought stress conditions

Wegener, Christina; Jansen, Gisela; Jürgens, Hans‐Ulrich

doi:10.31989/ffhd.v5i3.175

Cited by 25 publications

(14 citation statements)

References 30 publications

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“…Therefore, it is important to obtain a better knowledge on drought-induced changes and their impact on the quality of tubers including the nutritional and bioactive compounds relevant to human health. A previous experiment was focused on plant phenols and antioxidants [27]. This study concentrated on soluble sugars and starch, in addition to myo-inositol (MI), crude protein, fatty acid (FA), several minerals, and free amino acids (AAs).…”

Section: Introductionmentioning

confidence: 99%

Drought stress affects bioactive compounds in potatoes (Solanum tuberosum L.) relevant to non-communicable diseases

Wegener¹,

Jürgens²,

Jansen³

2017

FFHD

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Background: Potatoes react very sensitive to drought during growth, and appropriate plant stress responses may affect metabolites associated with the health quality of tubers.Objective: The aim of this study is to determine the effects of drought stress (DS) on soluble sugars, starch, crude protein, minerals, free amino acids (AAs) and fatty acids (FAs).Design: The experiment was carried out on three potato genotypes during two years with four replications. The plants were grown in pots, in a glasshouse with optimal water supply and under drought stress conditions. After harvest, the tubers of these two variants were analyzed for bioactive compounds relevant to non-communicable diseases (NCDs). Results: Apart from genotypic differences in most parameters, the results revealed that the DS caused a decline in glucose and fructose (P < 0.05, all) in both years, whereas sucrose was increased, especially in the second year with severe stress (P < 0.01). Starch was significantly reduced by moderate stress in the first year (P < 0.01), but less affected in the second year. Crude proteins and total amounts of free amino acids (AAs) were clearly enhanced by the stress in both years (P < 0.05, all), similarly as the minerals magnesium (Mg), potassium (K) and phosphorus (P) (P < 0.05, all), whereas calcium (Ca) declined (P < 0.05). The portion of α-linolenic acid (ALA) on total lipids was elevated in the stress variants (P < 0.01), while oleic acid (OLA), its precursor decreased significantly (P < 0.05), but only in the first year. In the second year, ALA was in general higher and not further induced by the stress. Also OLA was less affected in that year, similarly as all other FAs in both years. Interestingly, Myo-inositol (MI) and lipid acyl hydrolases (LAH) associated with modulation in cell membrane lipids raised by the drought stress in each year (P < 0.01, all). In the second year, MI and LAH data of the drought stressed tubers correlated significantly (r = 0.90, P < 0.01) indicating their joined action within plant stress responses.Conclusions: The biochemical changes induced by DS are not alarming with regard to NCDs. Decline in glucose, fructose and starch, and increase in crude proteins, free AAs, ALA, MI and minerals like Mg, K and P, on the other side, is profitable for the health benefits of tubers. However, a better quality is associated with a decrease in tuber yield.Keywords: potato, drought stress, bioactive compounds, chronic diseases

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Section: Introductionmentioning

confidence: 99%

Drought stress affects bioactive compounds in potatoes (Solanum tuberosum L.) relevant to non-communicable diseases

Wegener¹,

Jürgens²,

Jansen³

2017

FFHD

Self Cite

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“…Among the analyzed SHs, both types (i.e., MMR-deficient and MMR proficient) were selected. Several studies proved the effectiveness of phenotyping platforms in monitoring morphological and physiological changes of plants during water stress [43], but to the best of our knowledge, this is the first-time that somatic hybrids of potato are analyzed on a phenotyping platform.…”

Section: Plants Biomass Accumulation Under Drought Conditionmentioning

confidence: 99%

Drought and Saline Stress Tolerance Induced in Somatic Hybrids of Solanum chacoense and Potato Cultivars by Using Mismatch Repair Deficiency

et al. 2021

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Global climate change, especially when involving drought and salinity, poses a major challenge to sustainable crop production, causing severe yield losses. The environmental conditions are expected to further aggravate crop production in the future as a result of continuous greenhouse gas emissions, causing further temperature rise and leading to increased evapotranspiration, severe drought, soil salinity, as well as insect and disease threats. These suboptimal growth conditions have negative impact on plant growth, survival, and crop yield. Potato is well known as a crop extremely susceptible to drought, which is primarily attributed to its shallow root system. With potato being the fourth major food crop, increasing potato productivity is thus important for food security and for feeding global population. To maintain a sustainable potato production, it is necessary to develop stress tolerant potato cultivars that cope with the already ongoing climate change. The aim of our study is to analyze the response of potato somatic hybrids to drought and salt stress under in vitro conditions; the somatic hybrids studied are the wild relative Solanum chacoense (+) Solanum tuberosum, with or without mismatch repair deficiency (MMR). Upon this selection of drought and salt tolerant genotypes, somatic hybrids and their parents were phenotyped on a semi-automated platform, and lines tolerant to medium water scarcity (20% compared to 60% soil water capacity) were identified. Although none of the parental species were tolerant to drought, some of the MMR-deficient somatic hybrids showed tolerance to drought and salt as a new trait.

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“…According to studies by various authors [ 6 , 7 , 8 , 9 , 10 ], the share of protein nitrogen of total nitrogen in potatoes ranges from 37% to over 63%, i.e., in the range from 0.24% to 0.36% of fresh weight. Approximately 49% of the total amino acids are in free form [ 11 ], and the largest share, reaching 34–90% of the total pool of free amino acids, are the asparagine and glutamine amides [ 12 , 13 ]. Some authors [ 12 , 14 ] analysed purple- and red-fleshed potatoes for amino acid content and tuber nutritional value.…”

Section: Introductionmentioning

confidence: 99%

“…Changes in the composition of nitrogen compounds may also affect the quality characteristics of food products obtained from them [ 6 ]. The studies of changes in the content and profile of free amino acids in potatoes, conducted by various authors, referred to the influence of vegetation and environmental conditions, such as “water stress” [ 11 , 21 ], temperature, and storage time of tubers [ 6 , 22 ], but did not apply to cultivars with coloured flesh.…”

Section: Introductionmentioning

confidence: 99%

The Free-Amino-Acid Content in Six Potatoes Cultivars through Storage

et al. 2021

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Potatoes of six cultivars (Solanum tuberosum L.) with red, purple, and yellow flesh were stored at 2 and 5 °C for 3 and 6 months, and the influence of these factors on the content of free amino acids was determined. The potato cultivar and storage time had the greatest impact on the free amino acid content. The tubers of red-fleshed (Rote Emma) and purple-fleshed (Blue Congo) potatoes contained over 28 mg/g DM of free amino acids, and the Blaue Annelise cultivar with purple flesh had over 18 mg/g DM. After 6 months, the highest increase in their content (by 36%) was recorded in tubers of the Fresco cultivar (yellow-fleshed). In the analysed potatoes, the content of alanine, proline, serine, γ-aminobutyric acid, and α-aminoadipic acid increased, while that of asparagine, aspartic acid, and glutamine decreased. Asparagine decreased to the greatest extent in “Blaue Annelise” potatoes (by 24%) and that of glutamine in tubers of Rote Emma and Vineta by 18%.

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Bioactive compounds in potatoes: Accumulation under drought stress conditions

Cited by 25 publications

References 30 publications

Drought stress affects bioactive compounds in potatoes (Solanum tuberosum L.) relevant to non-communicable diseases

Drought stress affects bioactive compounds in potatoes (Solanum tuberosum L.) relevant to non-communicable diseases

Drought and Saline Stress Tolerance Induced in Somatic Hybrids of Solanum chacoense and Potato Cultivars by Using Mismatch Repair Deficiency

The Free-Amino-Acid Content in Six Potatoes Cultivars through Storage

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