NAA-induced ethylene evolution by plum flowers and fruitlets
2006
Gonkiewicz, A. | Nosal, K.,Krakow Agricultural University (Poland). Dept. of Pomology
Six-year-old plum trees Stanley were sprayed with a solution of NAA potassium salt. The treatments were conducted at two dates on two groups of trees. The first treatment was carried out by the end of the blooming period after flower fertilization. An additional indicator of the treatment at that time was the falling off petals and a distinctly visible abscission zone between the floral tube and the pedicle. The applied NAA concentrations varied from 30 to 80 mg/l. The second treatment was conducted about 10 days later. In all treatments of the experiment an increase in the evolution of ethylene by flowers and plum fruitlets was recorded already on the second day after spraying. In the three years of the investigation the most intense and prolonged ethylene evolution was noted after the first NAA treatment. A significant effect of weather conditions and years on the intensity of ethylene evolution by plum flowers and fruitlets was noticed
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