Effect of spraying with silicon and methyl Jasmonate on vegetative and flowering of Digitalis purpurea L.

Abstract

The experiment was conducted in one of the greenhouses of the Baquba Arboretum Research Station Center / Diyala Agricultural Directorate during autumn season of the year 2021-2022. To study the effect of spraying silicon and methyl Jasmonate on the growth and flowering of Digitalis purpurea L. The first factor involved spraying the vegetative growth with silicon at two concentrations, 0 and 100 mg L^-1 and methyl Jasmonate at different concentrations of 50 and 100 mg L^-1, Afactorial experiment (2 × 3 × 3) was conducted according to the randomized complete block design (RCBD) with three replicates, and the results of the experiment were as follows:

The results showed that there was a significantly excelled when spraying with silicon at a concentration of 100 mg L^-1 in the traits of plant height (39.19 cm), number of leaves (18.86 leaf plant^-1), leaf area (2069.6 cm ²), and chlorophyll content in leaves (2.59 mg 100 gm^-1).The dry weight of the leaves (10.84 g), the early flowering time (94.77 days), the number of inflorescences (9.35 inflorescences^-1), the number of florets per inflorescence (38.10 florets. inflorescences^-1), the fresh weight of the inflorescence (13.13 g), and the dry weight of the inflorescence (3.12). cloud). The results showed that there was a significantly excelled when spraying Methyl Jasmonate at a concentration of 100 mg L^-1 in plant height (38.07 cm). The number of leaves (18.15 plant leaves^-1), the leaf area (1939.8 cm²), the relative chlorophyll content in the leaves (2.55 mg 100 gm^-1), the dry weight of the leaves (10.13g), the early flowering time (95.08 days), the number of inflorescences (8.91 inflorescences. plant^-1) and the number of florets per inflorescence (36.89 florets plant^-1) The fresh weight of the inflorescence was (12.81 g) and the dry weight of the inflorescence was (2.93 g). The results of the interactions between the two factors of the study indicated a significant effect in improving most of the vegetative and flowering growth traits of the digitalis plant, and the interactions Si100×Mj100 excelled in recording the best results.