A review on potato microtuber storability and dormancy

Abstract

Potato microtubers plays important role in seed potato production technology as it has great advantage of storage, transport and mechanization due to their little size and reduced weight. Dormancy in potato microtubers is very important and storage conditions as well as size of microtubers influences the dormancy in microtubers. Increasing size of the micro-tuber resulted in significant increase in the viability and sprouting ability of microtubers with reduced durations of dormancy and weight loss at the end of storage. Small microtubers are more vulnerable to storage damage. The larger microtubers lost moisture content more slowly and retained firmness longer when stored at 40C. Development of dormancy during storage strongly affected by the storage condition especially the temperature regime, the presence of light and the relative humidity. The dormancy duration was linearly and inversely correlated with the length of storage. Storage containers and conditions are also important for microtuber storage. Endogenous hormones ABA, ethylene, cyokinin and gibberllic acid play a significant role in tuber dormancy regulation.Microtubers with thick diameter which have passed more times in dormancy and have better functionality than small microtubers with less time in dormancy. Growth regulators like gibberellic acid, thiourea, gibberllic acid + thiourea, randite and carbon disulphide plays significant role in dormancy breaking of microtubers.

Promoting Potato Seed Sprouting Using an Amphiphilic Nanocomposite

“…During the past few decades, a great many of methods of promoting potato sprouting have been developed, including physical and chemical aspects. Therein, the physical method mainly refers to thermal treatment of potatoes, and the chemical method mainly refers to treatment of potatoes using chemicals, including carbon disulfide, gibberellic acid, cytokinin, bromoethane, phenylurea, nitroguanidine cytokinins, etc. − Although these methods could promote potato sprouting to a certain extent, there are some defects limiting their huge applications. As for the physical method, thermal treatment shows a high cost and consumption of time and labor. − As for chemical methods, carbon disulfide generally displays a short duration, organic matter (gibberellic acid, cytokinin, bromoethane, phenylurea, nitroguanidine cytokinins, etc.)…”

Unraveling the mechanism of potato (Solanum tuberosum L.) tuber sprouting using transcriptome and metabolome analyses

“…After tuber dormancy ends, gibberellins (GA) play a key role in stimulating the active growth of sprouts (Claassens and Vreugdenhil, 2000). However, sprout growth can be inhibited by ethylene and ABA (Sadawarti et al, 2016). High levels of synthetic exogenous auxins may prevent eyes from growing to some extent, whereas low levels of auxins may activate bud growth (Suttle, 2007).…”

Productivity of potato micro bulbs in vitro depending on the duration of their storage for growing in the South of Ukraine

“…Автори [4] довели, що більші мінібульби мали менший період спокою та більші енергію проростання і вміст крохмалю, менше втрачали вологу під час зберігання. Дослідники [5] отримали подібні результати й зазначили, що період спокою в мікробульб є дуже важливим. Крім розміру, тривалість періоду спокою як один із визначальних факторів урожайності був відзначений авторами [6].…”