Effect of spraying number and type of growth regulator on growth, leaves yield and antioxidant activity for fenugreek leaves

Abstract EN

ABSTRACT The experiment was conducted in one of a private field during the winter season (2017-2018) in Babylon province, Al-Taliaa district, to know the effect of spraying number (one, two, three spraying) and the type of growth regulators (GA3, NAA, GA3×NAA) as well as control treatment on growth Indicators (plant height, the number of secondary branches, the number of leaves, leaf area, leaf area index, total chlorophyll pigments in leaves), leaves yield (fresh weight, the dry weight, the yield of unit area from the fresh and dry leaves) and antioxidant activity of seeds (total phenolic compounds, total antioxidant capacity and The percentage of free radical scavenging).

The treatments were distributed on factorial experiment according to randomized complete block design, with three replicates, the averages were compared by using least significant difference at probability level of 0.05.

The results showed that there were significant differences in the number of sprayings and the type of growth regulator in most Indicators of growth and fresh and dry leaves yield.

The treatment of twice spraying with NAA gave the highest values in the seeds content of total phenolic compounds and the total antioxidant capacity amounted of (257.88, 53.69 mg 100 g-1 dry weight).

The treatment of Twice spraying with GA3×NAA gave the highest averages in the percentage of free radical scavenging in seeds amounted of (79.83 %).