Influence of Salicylic Acidand Gibberellin Spraying on Some Morphological and Physiological Traits of Fenugreek Plant (Trigonell afoenum-gracenumL.)

Abstract

Field experiment had conducted in the winter of 2022-2023 at a field in Baqubah, Diyala Governorate to investigate the influence of salicylic acid and GA3 spraying on some morphological and physiological traits of the fenugreek plant. A factorial experiment was conducted using a randomized complete block design (RCBD) with three replications. The first treatment involved spraying with three different concentrations of salicylic acid (0, 10 and 20 mg Lˉ¹), whereas the second treatment involved spraying with three different concentrations of GA3 (0, 50 and 100 mg Lˉ¹), so the number of experimental units area reached 27 experimental units. The data underwent statistical analysis using the Genstat program, andthe least significant difference (LSD) test was utilized to compare concentrations at a significance level of 0.05. Results indicated that spraying the fenugreek plants with a concentration of 20 mg Lˉ¹ of salicylic acid significantly increased height of plant and potassium content in leaves, reaching 53.20 cm and 17.99 mg gˉ¹ respectively. While, spraying with salicylic acid at a concentration of 10 mg Lˉ¹ led to a significant increase in the number of branches and leaves per plant, phosphorus content in leaves, chlorophyll index, and plant dry weight which reached 13.82 branches per plant, 58.1 leaves per plant, 8.65 mg gˉ¹, 45.11 Spad and 26.71 g plantˉ¹ respectively. Spraying with GA3 at a concentration of 100 mg Lˉ¹ resulted in a notable increase in the plant height, and potassium content in leaves, reaching 55.12 cm and 17.53 mg gˉ¹ respectively. On the other hand, spraying with GA3 at a concentration of 50 mg Lˉ¹ led to a significant increase in the number of branches and leaves per plant, phosphorus content in leaves, chlorophyll index and plant dry weight which reached 14.75 branches per plant, 61.20 leaves per plant, 7.92 mg g ˉ¹, 47.45 Spad, 26.10 g per plant respectively. The interaction between salicylic acid and GA3 significantly affected all the features tested.