Manar  alreyahi^*(1)

 (1). Lattakia- University , Lattakia, Syria.

(*Corresponding author: Manar M alreyahi, E-Mail: manaralreyahi4@gmail.com. phone:0932166690 ).

Received:31/07/2024          Accepted: 6/04/2025

Abstract: 

The research was carried out in the Tobacco Research Center (Jableh) During the agricultural season 2023-2024, By cultivating the tobacco variety (Baladi (Shak Al-Bent) And treated with amino acids (Glutamine N, Thiamine (T) and Gibberellic Acid G) At a concentration of (2 mg/L) and a rate of three sprays according to the randomized complete block design (RCBD) with three replicates per treatment to study its effect on some characteristics (Plant height (cm), number of leaves/plant, plant productivity (g), Leaf length and width (cm), Length / Width ratio and leaf area (cm²). The results showed the positive effect of treatment with amino acids and gibberellic acid on all the studied traits, It led to an increase in plant height, number of leaves/plant and plant productivity compared to the control, Leaf dimensions and area in plants treated with amino acids compared to controls, On the other hand, the amino acid (glutamine (N) showed superiority over (gibberellic acid (G) and thiamine (T) in plant height, which reached (44.3 cm), And in the number of leaves (14.5), the productivity of the plant (120.05 g),  the length of the leaf (31.87 cm), the width of the leaf (14.6 cm), and its area (316.54 cm2). Glutamine outperformed both thiamine and gibberellic acid in most of the properties studied, We recommend using amino acid and Gibberellic Acid G sprays on tobacco plants because of their positive effects on many morphological and productive characteristics.                                      

Keywords: Nicotiana tabacum- amino acids- Glutamine- thiamine gibberellic acid- Plant height- Yield- leaf area.

 Full paper in Arabic: PDF