The effect of different levels of Wokozim fertilizer on the true seed of potato hybrid of Savalan and Satina breeding population under water deficiency stress in in vitro conditions

To investigate the effect of Wokozim Fertilizer, containing seaweed, on potato hybrids obtained from the crossing of Savalan and Satina cultivars under normal and water deficiency stress conditions was conducted in the laboratory of Zare Gostar Arta Technology Company, under in vitro conditions, during 2017. The experiment was performed as a factorial experiment in a completely randomized design with three replications. The first factor consisted of three levels of polyethylene glycol 6000 (zero, -3 and -6 bar) to apply water deficiency stress and the second factor consisted of three levels of Wokozim (zero, 30 and 60 ml /L). The effect of water deficiency stress on all traits and the effect of Wokozim on the all studied traits except for seed germination percentage was significant. The interaction effect of water deficiency × Wokozim was significant for all traits except stem length. Stem length decreased due to increasing water stress intensity. The maximum stem length (4.67 cm) was observed at the 30 ml/l of level of Wokozim fertilizer. The water deficiency stress reduced the values of all traits. According to the results, in conditions of severe stress, application of 60 ml/l of Wokozim can improve germination percentage, root and stem length, but had no significant effect on weight and number of microtubers. In addition, in conditions without stress, 60 ml /l and Wokozim can improve most of the traits.