Foliar application of chitosan improves plant biomass, physiological and biochemical attributes of rose (Gruss-an-Teplitz)

Abstract

Rose is an important floricultural crop that has been exploited for many uses. Its important uses in different industries include, pharmaceutical, perfumery, and food industries that manifest higher flower yield. Therefore, response of Gruss-an-Taplitz to foliar application of chitosan (Ct) solution (0, 2.5, 5, 7.5, 10 mg L-1), was evaluated in an experimental field. Ct treatment had significant effects on studied parameters, including plant growth, pigments, enzymes, and gaseous exchange. This experiment was laid out under Randomized Complete Block Design (RCBD) using three replications per treatment. Ct (7.5 mg L-1) significantly improved growth, in terms of higher leaf area (20.37%), plant height (20.19%), number of flowers (55.51%), flower weight (34.64%) and flower diameter (33.78%) as well as enhancing relative water contents (27.38%) with respect to control. Chlorophyll a (54.60%), Chlorophyll b (12.13%), Carotenoid (8.36%) and anthocyanins (17.09%) were also increased at 7.5 mg L-1 Ct, which showed higher photosynthetic pigments as compared to control. Consequently, Ct (7.5 mg L-1) treated plants showed higher enzymatic activity; CAT (9.94%), SOD (83.87%), POD (64.54%), total antioxidant (35.48%), phenolics (7.41%) and gaseous exchange; Pn (55.65%), E (31.76%), and gs (18.38%) Ci (34.17%) that improved the plant growth and productivity of Gruss-an-Taplitz. Foliar application of 7.5 mg L-1 Ct improved biomass, water preservation, pigments, enzymatic activity and leaf gaseous exchange, resulted in higher production and quality of Gruss-an-Taplitz plants.

Effect of chitosan application time on seedlings of various rambutan varieties (Nephelium lappaceum L.)

“…Applying chitosan to the leaves can increase the vegetative growth stage and plant production yields [5]. Chitosan is effectively absorbed in plant leaves, providing amino acids that enhance various metabolic processes and plant growth [6]. The application of chitosan affects plant height, number of leaves, and seed weight of Grobogan soybean varieties which can increase yields by 61.64% compared to soybeans without chitosan treatment.…”