Effect of hormonal pretreatments on seed germination characteristics of Lolium rigidum Gaudin. and Lolium prenne L.

In order to investigate the effect of gibberellic, ascorbic, salicylic acid pretreatments on the germination of Lolium prenne L., Lolium rigidum Gaudin species. An experiment was designed in the laboratory of the Caspian Forest Seed Center. This research was conducted with the treatment of gibberellic acid with concentrations of 125, 250 parts per million for 24 hours and ascorbic acid with concentrations of 100, 200, 300 mg/liter and salicylic acid with concentrations of 200, 300, 400 mg/liter for a period of 24 hours. The time was 12 hours in the form of a completely random design with 3 repetitions. In addition, distilled water was considered as control treatment. In this experiment, traits such as germination percentage, germination speed, germination value and seed germination index were evaluated. The results of analysis of variance and mean comparison showed that there is a significant difference between the treatments in terms of germination percentage, germination speed, germination value and germination index at the level of 1% and priming increases the germination percentage and germination speed. , germination value and germination index. As a result, gibberellic, ascorbic, and salicylic acid treatments as suitable pretreatments significantly increased the seeds of Lolium rigidum Gaudin species. and Lolium prenne L. are in the germination stage, and ascorbic acid treatment at a concentration of 300 mg/liter caused better germination compared to other treatments.