The effect of using salicylic acid, antifreeze and soybean oil on the amount of photosynthetic pigment, healthy pistil and the percentage of fruit formation of the cherry "Siah Tokadane Mashhad" under cold stress conditions.

In order to investigate the effect of the use of salicylic acid, antifreeze and soybean oil on the cold resistance of sweet cherry flower of the " Siah Tekdane Mashhad " a factorial experiment was conducted in the form of a randomized complete block design with 3 factors each at 3 levels (salicylic acid : 0, 1.5 and 3 mM), (natural antifreeze Thiofer: 0, 2.5 and 5 parts per 1000) and (soybean oil: 0, 2.5 and 5 parts per 1000)} and in 4 repetitions in A commercial garden located in Sarein city was implemented in 2018 and 2019. The percentage of cherry fruit formation as well as the amount of chlorophyll a, b and total pigments were significantly influenced by the interaction of salicylic acid and salicylic acid. Also, the amount of total chlorophyll was influenced by salicylic acid*soybean oil interactions. The comparison of the averages showed that the highest percentage of healthy females (69.25%) was obtained in the treatment combination of 1.5 mM salicylic acid*2.5 concentration (parts per thousand) of soybean oil*5 concentration (parts per thousand) of antifreeze. which had no significant difference with the treatment of 3 mM salicylic acid at a concentration of 2.5 (parts per thousand) of soybean oil and at a concentration of 5 (parts per thousand) of antifreeze. The highest concentration of chlorophyll a (14.87 mg/g fresh weight) was observed in 2018 crop year and foliar spraying of 3 mM salicylic acid.