Effect of Soaking with increasing concentrations of glutamic acid on some phenotypic traits and yield of flax plant Linium Usitatssimum

The experiment was applied in the botanical garden for science department/collage of Basic Education AL-Mustansiriya University in the winter season for the year 2023-2024 to study the effect of soaking periods by increasing concentrations of glutamic acid on the phenotypic characteristics and yield of flax where it was plant in experimental units of (27) units a cope with the design of randomized complete blocks (R.C.B.D) the experimental transactions where are as follow: Soaking periods (8.16.24) hours while the concentrations of glutamic acid were (0,100,200) mg.Lˉ¹ to study the following traits ((plant height, number of branches, number of Capsules weight of 1000 seeds, percentage of oil , oil yield)). The results showed clear significant differences for the studied characteristic at a soaking period of 24 hours, it showed highest results compared to the control transactions. The percentage of increase for each characteristic as follows (59.4%, 117.8%,71.9%) percentage of oil 100.5%, oil yield 163% except for the weight of 1000 seeds, which was exceeded by period of 16 hours was increase rate about (58. 4 %) As for the factors of seeds with glutamic acid , It showed the highest average of the studied features when the seeds soaking with concentrations of 200 mg. Lˉ¹. The rate of increasing percentage was clear according to the order of characters (37.6% , 97.3% , 96.1%, 87.6%, 142.7%,95%) compared to soaking with distilled water . However , when studying the interactions between the soaking period and glutamic concentrations , no appear any difference on the studied characteristics except for the percentage for the percentage for the oil 402% over the rest of factors .