Abstract
The present study has found that dried potato samples yielded significantly higher levels of steroidal alkaloids such as α-solanine and α-chaconine than the corresponding fresh samples, as determined by the UPLC-MS/MS technique. Among the drying techniques used, air drying had the highest effect on steroidal alkaloid contents, followed by freeze drying and vacuum oven drying. There was no significant difference between the freeze dried and vacuum oven dried samples in their α-chaconine contents. However, freeze dried potato shoots and berries had significantly higher α-solanine contents (825 µg/g dry weight (DW) in shoots and 2453 µg/g DW in berries) than the vacuum oven dried ones (325 µg/g dry weight (DW) in shoots and 2080 µg/g DW in berries). The kinetics of steroidal alkaloid contents of potato shoots during air drying were monitored over a period of 21 days. Both α-solanine and α-chaconine content increased to their maximum values, 875 µg/g DW and 3385 µg/g DW, respectively, after 7 days of drying. The steroidal alkaloid contents of the shoots decreased significantly at day 9, and then remained unchanged until day 21. In line with the potato shoots, air dried potato tuber peels also had higher steroidal alkaloid content than the freeze dried and vacuum oven dried samples. However, a significant decrease of steroidal alkaloid content was observed in air dried potato berries, possibly due to degradation during slicing of the whole berries prior to air drying. Remarkable variation in steroidal alkaloid contents among different tissue types of potato plants was observed with the potato flowers having the highest content.
Highlights
A high volume of potato peels are generated in the potato processing industries as a byproduct, which has low or no value
The highest total steroidal alkaloid content was observed in potato flowers, followed by sprouts
Potato shoots showed a remarkable increase of total steroidal alkaloid content during air drying reaching the maximum at day 7 (Figure 3)
Summary
A high volume of potato peels are generated in the potato processing industries as a byproduct, which has low or no value These by-products are generally discarded in landfills with accompanying negative effect on environment or used as low value animal feed [1]. It has beenbeen hypothesized that been synthesized synthesizedfrom fromaasteroidal steroidalcompound, compound, lanosterol It has hypothesized chemical modification of potato steroidal alkaloids would generate novel apoptotic anticancer that chemical modification of potato steroidal alkaloids would generate novel apoptotic anticancer compounds compounds which which might might show show enhanced enhanced anticancer anticancer property property possibly possibly equivalent equivalent or or higher higher to to tamoxifen. In a considerable number of of sequential reactions, a large quantity of solanum steroidal alkaloid is required as a substrate.
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