Glycoalkaloid levels in New Zealand potatoes

Patchett, B.; Cunningham, Patricia S.; Lill, Ross E.

doi:10.1080/03015521.1977.10425933

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…Although statistical analysis of results shows cultivar differences in TGA content, because of likely variable recoveries, too much significance cannot be attached to these differences. However, the order of ranking of cuItivars for TGA content is similar at each analysis, and Whitu is consistently lower than Ham Hardy and Rua, which agrees with the findings of Patchett et al (1977). Workers in other countries have found that average TGA levels are in the range 2-13 mg/IOO g whole tuber (Bomer & Mattis 1924;Sinden & Webb 1972), and 20 mg/IOO g is often taken as the maximum acceptable level (Whitaker & Feeney 1973).…”

Section: Resultssupporting

confidence: 69%

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Total glycoalkaloids and chlorophyll in potato cultivars bred in New Zealand

Butcher¹

1978

New Zealand Journal of Experimental Agriculture

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Mature tubers of the potato cultivars bred at Crop Research Division, DSIR, were assayed for total glycoalkaloid (TGA) content before and after exposure to light, and for chlorophyll content after exposure to light. Tubers were assayed soon after harvest and after storage for 2 and 4 months at 10°c. Although recoveries were somewhat variable, TGA content was generally low but was increased by exposure to light; the levels also increased slightly during storage and the longer tubers were stored the less the increase in response to illumination. Dno was the only cultivar to exceed 20 mg TGNIOO g whole tuber when exposed to light. Differences in chlorophyll accumulation were found, and cultivars which contained high chlorophyll levels were not necessarily those which accumulated most TGA. Chlorophyll accumulation after exposure to light was also less in stored tubers.

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Section: Resultssupporting

confidence: 69%

“…As already mentioned the ranking of cultivars for TG A content is similar both before and after illumination. Others (Sanford & Sinden 1972;Patchett et al 1977) have found that cultivars with high initial levels tend to accumulate more TGA on exposure to light than those with low initial levels. .…”

Section: Resultsmentioning

confidence: 97%

Total glycoalkaloids and chlorophyll in potato cultivars bred in New Zealand

Butcher¹

1978

New Zealand Journal of Experimental Agriculture

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“…Similarly, early potatoes (i.e., Dark Red Norland) that tend to be smaller would likely have higher TGA at harvest than later varieties grown full season that tend to produce larger tubers 42. The life cycle of the potato is of importance, because tubers susceptible to sprouting have a higher solanine content than freshly harvested tubers 100. Sprouting itself leads to a rise in the solanine content 101, 102.…”

Section: Factors Influencing the Formation Of Ga In Potatoesmentioning

confidence: 99%

Potato glycoalkaloids: formation and strategies for mitigation

Nema

Ramayya

Duncan³

et al. 2008

J Sci Food Agric

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With the increasing production and consumption of potato and its products, glycoalkaloid (GA) formation and toxicity are likely to become an important focus for food safety researchers and public health agencies. Not only the presence of GA, particularly in the form of α-solanine and α-chaconine, but also the changes occurring as a result of various post-harvest handling practices and storage, are critical issues influencing the quality of stored potatoes. Studies on various factors (pre-harvest, during harvest and post-harvest) affecting GA have been carried out from time to time, but it is difficult to compare the results of one study with another due to wide variation in the parameters chosen. This review aims to develop a clear understanding of these issues. Published information on the types of GA, their effects on health, their typical concentrations in potatoes, their formation mechanisms, and how their levels can be controlled by following appropriate post harvest practices and storage regimes are critically analysed. The levels of GA in potato can be controlled effectively by adopting appropriate post-harvest practices. Further studies are necessary, however, to investigate best practices, which either check completely or retard substantially their formation.

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“…These steroidal glycoalkaloids (SGA) are natural toxins commonly present in potato varieties in concentrations of up to 100mg/kg (Sinden & Webb, 1974 ;Patchett et al ., 1977 ;Ross et al ., 1978 ;Parnell et al ., 1984 ; Van Gelder, 1985a ;Lammerink, 1985) . In this paper, contents are expressed as mg/kg fresh unpeeled tuber, unless otherwise stated .…”

Section: Introductionmentioning

confidence: 99%

“…Lepper (1949) regarded contents of 150 mg/kg too high for consumption, while McMillan & Thompson (1979) associated a content of 250-300 mg/kg peeled boiled potato with solanine poisoning in schoolboys . Reviews on the toxicology, pharmacology and teratology of steroidal alkaloids (SA) and SGA are given by McMillan & weather during the growing season, and inadequate storage conditions may considerably increase the contents of solanidine glycosides (Bomer & Mattis, 1924 ;Sinden & Webb, 1974 ;Patchett et al ., 1977 ;Ahmed & Miiller,1981 ;Jadhav et al ., 1981) . In Sweden, large amounts of the variety Magnum Bonum had to be withdrawn from commerce recently, because of incidences of illness caused by high levels of solanidine glycosides (Norberg, 1987) .…”

Section: Introductionmentioning

confidence: 99%

Steroidal glycoalkaloids in tubers and leaves of Solanum species used in potato breeding

Gelder¹,

Vinke²,

Scheffer

1988

Euphytica

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The compositions of glycosidic-bound steroidal alkaloids (SA) of Solanum species used in potato breeding were assessed by capillary gas chromatography using simultaneous nitrogen-specific (NPD) and flameionisation detection (FID) . High concentrations of solanidine glycosides and other steroidal glycoalkaloids, amongst which the teratogenic SA solasodine, were found in tubers and leaves of wild species . In addition unidentified compounds were found, which were most probably SA as was shown by their NPD/FID response ratios . The total glycoalkaloid contents varied from 123 to 7348 mg/kg fresh weight . Tubers of cultivars, corresponding in small size and grown under the same conditions as tubers of the wild species, showed contents of solanidine glycosides which were 2-3 times higher than those of field-grown normal tubers (126-721 vs 40-360 mg/kg fresh weight, respectively) . In some cases the SA compositions of the tubers were markedly different from those of the leaves of the same plant or they varied between accessions of the same species . Also the growing conditions appeared to influence the composition quantitatively and qualitatively .The consequences for potato breeding of utilizing wild Solanum species containing potentially hazardous levels of SA are discussed .

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Glycoalkaloid levels in New Zealand potatoes

Cited by 7 publications

References 7 publications

Total glycoalkaloids and chlorophyll in potato cultivars bred in New Zealand

Total glycoalkaloids and chlorophyll in potato cultivars bred in New Zealand

Potato glycoalkaloids: formation and strategies for mitigation

Steroidal glycoalkaloids in tubers and leaves of Solanum species used in potato breeding

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