Ali Salehi Sardoei, Parviz Rahbarian and Mojgan Shahdadneghad
The Minolta SPAD 502 meter is a hand-held light meter used to measure the relative greenness of leaves in a rapid manner. (SPAD is an acronym for Soil Plant Analysis Development.) SPAD 502 determines the relative amount of chlorophyll present by measuring the transmittance of the leaf in two wave bands (600-700 and 400-500 nm). Portable, non-destructive chlorophyll meters could be a valuable tool for forest managers and researchers. The effect of gibberellic acid and benzyladenine on Ficus benjamina, Schefflera arboricola and Dizigotheeca elegantissima was evaluated at pot cultivation conditions. This study was performed in three factorial test based on completely randomized design and 4 repeation with 9 treatments. The objective of this study was to evaluate the ability of a estimate chlorophyll (CHL) of foliar application with gibberellic acid (GA3) and benzyladenine (BA) at 0, 100 and 200 mg.L-1 levels 60, 120 and 180 day after spray on chlorophyll contents. The obtained results show, highest chlorophyll content of Ficus benjamina, Schefflera arboricola and Dizigotheeca elegantissima flower was achieved for 200 mg.L-1 GA3 and 200 mg.L-1 GA3 + 200 mg.L-1 for 180 DAP which showed significant difference from control treatment in either of the levels (p<0.05). Increasing concentration of the growth regulator up to 200 mg.L-1 GA3 + 200 mg.L-1 BA significantly increased chlorophyll content compared to control treatment. Compared to other concentrations, control had the lowest chlorophyll content (p<0.05). Results of the investigation showed that application of plant growth regulators in higher concentrations had positive effects on leaf chlorophyll content of Ficus benjamina, Schefflera arboricola and Dizigotheeca elegantissima foliage plants.
