Effects of Production History and Gibberellic Acid on Seed Potatoes

Abstract

In the present study effects of production history on tuber sprout, root, stem development and crop yield of seed potato cultivars Fambo and Van Gogh were investigated in the High Grade Area of Finland (64.9 N, 25.4 E). The haulms of seed potatoes were destroyed at the time of flowering (50 days after planting, DAP), three weeks after flowering (75 DAP) and as a control the haulm was left to natural death until harvest (95 DAP). The temperature sum accumulation of the seed potatoes was recorded for the growing season and storage period. In addition, the use of plant hormone gibberellic acid (GA) in sprout control was also investigated.The results indicated that cultivar properties had a greater effect on the sprouting and crop yield of seed potatoes than production-phased haulm killing or temperature sum accumulation. Haulm killing carried out at three weeks after flowering (75 DAP) accelerated the emergence of both cultivars significantly compared to killing at 50 DAP or 95 DAP. Gibberellic acid (GA) treatments significantly increased the number of sprouts and at lower concentration (100 mM) GA increased the number of tubers in the cultivar Fambo. Thus, the timing of haulm killing and in the case of Fambo, GA treatment influenced the characteristics of seed potatoes produced in the present study, revealing methods to improve seed potato production in the northern latitudes.

Effect of Exogenous General Plant Growth Regulators on the Growth of the Duckweed Lemna minor

“…The treatment of maize plants with GA 3 increased the length of the leaf blade elongation zone compared with that in the control via an increase in cell division and cell elongation duration (de Souza and MacAdam, 2001 ). In other plants such as potatoes as well, GA 3 treatments significantly increased the number of sprouts, stems, and tubers at very high concentrations of 100 mM in the cultivar “Fambo,” but the total biomass did not increase (Virtanen et al, 2013 ). Oota and Tsudzuki ( 1971 ) reported that the number of fronds was increased to 125% by the application of 100 μM GA 3 .…”

Promoting Potato Seed Sprouting Using an Amphiphilic Nanocomposite

“…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.) displays relatively low stability and tends to induce thin and fragile sprouts, and some of them are not environmentally friendly .…”

“…As for the physical method, thermal treatment shows a high cost and consumption of time and labor. 14−16 As for chemical methods, carbon disulfide generally displays a short duration, 17 organic matter (gibberellic acid, cytokinin, bromoethane, phenylurea, nitroguanidine cytokinins, etc.) displays relatively low stability and tends to induce thin and fragile sprouts, and some of them are not environmentally friendly.…”

Effect of gibberellic acid-3 and 6-benzylaminopurine on dormancy and sprouting of potato (Solanum tuberosum L.) tubers cv. Diacol Capiro

“…They found increases in sprout elongation with doses of up to 1000 mg L -1 GA 3 and attributed this effect to the role this plant growth regulator plays in cellular elongation processes. The development of long and/or thin sprouts is a characteristic that can affect the quality of the tuber as seed by making sprouts more susceptible to damage by handling during transport and planting (Virtanen et al, 2013).…”