Lipids of potato tubers. III. Effect of growth and storage on lipid content of the potato tuber

1974 ◽  
Vol 25 (7) ◽  
pp. 861-867 ◽  
Author(s):  
Howard D. Berkeley ◽  
Terence Galliard
Keyword(s):  
Potato Tuber ◽  
Lipid Content ◽  
Potato Tubers ◽  
And Storage

scholarly journals Chlorogenic acid content in potato tubers with colored flesh as affected by a genotype, location and long-term storage

2019 ◽  
Vol 65 (No. 7) ◽  
pp. 355-360
Author(s):  
Matyáš Orsák ◽  
Karel Hamouz ◽  
Jaromír Lachman ◽  
Pavel Kasal
Keyword(s):  
Chlorogenic Acid ◽  
Acid Content ◽  
Field Experiments ◽  
The Other ◽  
Potato Tubers ◽  
Flesh Color ◽  
Long Term Storage ◽  
And Storage ◽  
Term Storage

In three-year field experiments, the effect of genotype, flesh color, site conditions and storage on chlorogenic acid content (CAC) in tubers of potato cultivars with purple or red flesh was compared to yellow-fleshed cv. Agria. The results confirmed the significant effect of genotype on CAC. The highest CAC was characteristic on a three-year mean for the purple-fleshed cv. Vitelotte (769.5 mg/kg fresh weight (FW)), i.e. 1.19−2.6 times higher than in the other cultivars. In regard to the effect of flesh color, significantly higher mean CAC levels have been shown for the red-fleshed (2.8 times) and purple-fleshed (3.16 times) cultivars in comparison with cv. Agria (148 mg/kg FW). At the Uhříněves location with a warmer climate and frequent dry periods as compared to the second Valečov location, a higher CAC (1.18 times) was found. Cold storage (4°C, 6 months) resulted in a significant CAC increase varying from 33.2% in the Blaue St. Galler cultivar to 210.6% in the Vitelotte cultivar among all eight evaluated color-fleshed cultivars. On the other hand, the effect of storage on CAC was not evident in the yellow-fleshed Agria cultivar (inconclusive difference against CAC after harvest).

scholarly journals Expression Levels of the γ-Glutamyl Hydrolase I Gene Predict Vitamin B9 Content in Potato Tubers

Agronomy ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 734 ◽  
Author(s):  
Bruce R. Robinson ◽  
Carolina Garcia Salinas ◽  
Perla Ramos Parra ◽  
John Bamberg ◽  
Rocio I. Diaz de la Garza ◽  
...  
Keyword(s):  
Potato Tuber ◽  
Tomato Fruit ◽  
Genetically Engineered ◽  
Food Crops ◽  
Great Success ◽  
Rice Grain ◽  
Rna Seq ◽  
Potato Tubers ◽  
Vitamin B9 ◽  
Folate Biosynthesis

Biofortification of folates in staple crops is an important strategy to help eradicate human folate deficiencies. Folate biofortification using genetic engineering has shown great success in rice grain, tomato fruit, lettuce, and potato tuber. However, consumers’ skepticism, juridical hurdles, and lack of economic model have prevented the widespread adoption of nutritionally-enhanced genetically-engineered (GE) food crops. Meanwhile, little effort has been made to biofortify food crops with folate by breeding. Previously we reported >10-fold variation in folate content in potato genotypes. To facilitate breeding for enhanced folate content, we attempted to identify genes that control folate content in potato tuber. For this, we analyzed the expression of folate biosynthesis and salvage genes in low- and high-folate potato genotypes. First, RNA-Seq analysis showed that, amongst all folate biosynthesis and salvage genes analyzed, only one gene, which encodes γ-glutamyl hydrolase 1 (GGH1), was consistently expressed at higher levels in high- compared to low-folate segregants of a Solanum boliviense Dunal accession. Second, quantitative PCR showed that GGH1 transcript levels were higher in high- compared to low-folate segregants for seven out of eight pairs of folate segregants analyzed. These results suggest that GGH1 gene expression is an indicator of folate content in potato tubers.

THE FLUORESCENCE OF FROZEN POTATO TUBER AND APPLE FRUIT TISSUE UNDER ULTRA-VIOLET LIGHT

1945 ◽  
Vol 23c (2) ◽  
pp. 76-78 ◽  
Author(s):  
W. Newton ◽  
W. Jones
Keyword(s):  
Potato Tuber ◽  
Ultra Violet ◽  
Apple Fruit ◽  
Potato Tubers ◽  
Tuber Tissue ◽  
Fruit Tissue ◽  
Potato Tuber Tissue ◽  
Violet Light ◽  
Apple Tissue ◽  
Acetone Extracts

Freshly cut sections of frozen potato tuber and apple fruit tissue exhibit a brilliant fluorescence when examined in a dark room under an ultra-violet (Stroblite) lamp. The fluorescence disappears from the apple tissue upon thawing but is retained in potato tuber tissue. Thus the ultra-violet lamp serves as a useful diagnostic means of detecting frost or low temperature injury in potato tubers. Many other plant tissues were frozen and examined, but proved to be non-fluorescent. Acetone extracts of both normal and frozen potato tuber tissue were fluorescent, but similar extracts of both frozen and normal apple fruit were not. Although normal potato tissue is non-fluorescent and frozen tissue is brightly fluorescent, no differences were found in the brightness of the acetone extracts.

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