عنوان مقاله [English]
نویسندگان [English]چکیده [English]
One of the major problems in reproduction of potato minitubers, is the low germination due to dormancy period that it’s led to low germination percentage, vigor and rot of tubers planted. Therefore a factorial experiment based on the Completely Randomized Design with three replications was carried out with a topic of the effects of application of Rindite in various concentrations (0, 0.2, 0.4 and 0.6 ml L-1) and exposure duration (24, 48 and 72 h) on the breaking of dormancy and sprouting of potato (Solanum tuberosum L., cv. Marfona) minitubers in two ages (freshly harvested and one week after harvest). In comparison with the control, Rindite treated minitubers showed significantly shorter dormancy, especially when minitubers were treated one week after harvest. Three-way interactions of concentration, duration and minitubers age on the minituber sprouting were statistically significant and application of Rindite by fumigation with 0.2 ml L-1 for 48 h or 0.4 ml L-1 for 24 h effectively reduced the dormancy period of one week old minitubers. The number of sprouts per minituber was significantly enhanced by treating minitubers with Rindite, however, there were no differences among concentration or exposure duration. The length of sprouts per minituber was significantly increased by treating minitubers with Rindite. There were also strong interaction between concentration and duration, so that in concentration of 0.2 ml L-1, the length of sprout showed a positive correlation with exposure duration. When longer duration was accompanied with higher concentration, treatment with Rindite led to rotting of minitubers.