Metabolic Control of Low‐Temperature Sweetening in Potato Tubers during Postharvest Storage

Effects of Storage Temperature on Fruit Quality and Expression of Sucrose Phosphate Synthase and Acid Invertase Genes in Japanese Pear

“…During storage at cold temperatures, potato tubers accumulate free reducing sugars derived from the breakdown of starch to sucrose, which is then converted into glucose and fructose (Blenkinsop et al, 2004;McKenzie et al, 2013;Samotus et al, 1974). This metabolic process is known as cold-induced sweetening (Sowokinos, 2001).…”

Alleviation of low temperature sweetening in potato by expressing Arabidopsis pyruvate decarboxylase gene and stress-inducible rd29A: A preliminary study

“…These results suggest overexpression of AtPDC1 resulted in increased LTS-tolerance. The accelerated accumulation of sucrose, fructose and glucose that occurs during LTS is an extremely complex process, involving the interaction of a number of pathways of carbohydrate metabolism, including starch degradative and synthetic pathways, sucrose synthesis and degradation, glycolysis, the oxidative pentose phosphate pathway, and mitochondrial respiration (Blenkinsop et al 2004). Other researchers have recently developed LTStolerant potatoes by inhibiting the activities of vacuolar invertase by genetically modifying potatoes (Ye et al 2010).…”

“…LTS, therefore, is a major concern to the potato processing industry. However, there are many advantages of storing processing tubers at low temperature which include less shrinkage and disease loss, control of sprouting, reduction/ elimination of the use of chemical sprout inhibitors and extended marketability (Wismer et al 1995;Sowokinos 2001;Blenkinsop et al 2004). An Environmental Protection Agency mandate (1996) within the requirements of the Food Quality Protection Act (FQPA) resulted in a reduction in allowable CIPC residue, a chemical sprout inhibitor on fresh potatoes in the USA from 50 ppm to 30 ppm.…”

A new isoform of thioredoxin h group in potato, SbTRXh1, regulates cold-induced sweetening of potato tubers by adjusting sucrose content

“…Therefore, exploring the mechanism of CIS has both scientific and applied importance (Muttucumaru et al 2008). Changes in carbohydrate metabolism (Blenkinsop et al 2004) and membrane properties (Wismer et al 1998) have been postulated to explain CIS, but its regulation mechanism remains incompletely understood.…”

“…TRX h is also believed to be involved in other biological processes, such as self-incompatibility (Cabrillac et al 2001), carbon and nitrogen metabolism (Kobrehel et al 1991), defense responses (Sun et al 2010) and seed sprouting (Guo et al 2011). In the last 30 years, more than 400 potential thioredoxin target proteins were identified and some enzymes reported to contribute to CIS were included, such as Suc synthase (Blenkinsop et al 2004), starch debranching enzyme (Cho et al 1999) and alcohol dehydrogenase (Pinhero et al 2007). However, information that directly indicates the association of thioredoxin to potato CIS is limited.…”