Влияние регуляторов роста растений на формирование эмбриональной плодоносности почек зимующих глазков по длине однолетнего вызревшего побега технического сорта винограда Бианка

Abstract

The influence of the plant growth regulators gibberellin and mycephyt on the embryonic inflorescence initiation along the length of the annual shoot of the Bianca grape variety, taking into account the climatic conditions of the year, was the purpose of our research. A treatment of plants was carried out before flowering with gibberellin at a concentration of 100 mg/l and mycephyt at three concentrations of 1, 10 and 100 mg/l. Fruiting coefficient and fruitfulness coefficient of the central buds of overwintering compound buds (eyes) along the length of the annual shoot were calculated, as well as the portion of fruitful eyes with 2-3 embryonic inflorescences was determined based on the obtained results. It was established that the treatment of plants with gibberellin stimulated the initiation of embryonic inflorescences at the level of the 7th node, which exceeds the control by 1,4 times. An increase in the portion of embryonic inflorescences at the level of the 2nd, 4th and 7th nodes by 12,8, 31,0 and 15,3 % was detected in comparison with the control when using mycephyt at a concentration of 1 mg/l. Also, an increase in the fruitfulness coefficient (ratio of the number of embryonic inflorescences to the number of fruitful eyes) at the level of the 7th node (1,77), which is 1,2 times higher than the control (1,46) in mychephyt (1 mg/l) treatment version was noted. The maximum value of fruitfulness coefficient was established in gibberellin and mycephyt (1 mg/l) treatment versions at the level of 8-10th (1,71) and 4-7th node (1,47), accordingly.