An Attempt to Alleviation of Irrigation Water Deficit Stress in Cabbage (Brassica oleracea Var. Capitata L.) by Exogenous Foliar Application with some Antioxidant

Abstract

Two field experiments were carried out during the two winter seasons of 2015 and 2016 under clay loamy soil conditions using surface improving irrigation system at the Experimental Station, Faculty of Agriculture, Mansoura University, Dakahlia governorate, Egypt. to study vegetative growth and yield of cabbage (cv. o.s. cross) influenced by irrigation water deficit treatments in three levels include without stress as control (full irrigation), moderate and severe stresses (75 % and 50 % from the control, respectively) and foliar application with some antioxidants consisted of (without exogenous antioxidant, 0.3 g /l ascorbic acid, 0.1 g/l chitosan and 4.0 g/l glycine betaine) and their interactions. The results showed that increasing of irrigation water deficit led to significant decreases of vegetative growth characters (i.e. Plant height, foliage weight, leaves fresh weight, number of leaves, leaves area), Chemical composition of outer leaves (chlorophyll a, chlorophyll b, carotenoids, N, P and K), Heads yield and its physical and chemical qualities (head weight, edible head weight, edible head diameter, edible head compactness rate, Vit. C, TSS and total heads yield /fed.) and leaf relative water content. On contrast, edible head dry matter, electrolyte Leakage and water use efficiency percentage were increased. As for the impact of foliar application of antioxidant, results exhibited that, the previous parameters were increased compared to the control (without antioxidant) except electrolyte leakage. Chitosan at 0.1 g/l followed by 0.3 g /l ascorbic acid were recorded the highest values of most effective mentioned parameters. The interaction between irrigation water deficit and foliar application with some antioxidants showed that the combination of full irrigation and 0.1 g/l chitosan gave the highest values of most effective previous parameters. Also, insignificant differences were noticed between full irrigation or moderate stress treatments with antioxidant for most effective mentioned parameters.

Impact of Foliar Application of Chitosan Dissolved in Different Organic Acids on Isozymes, Protein Patterns and Physio-Biochemical Characteristics of Tomato Grown under Salinity Stress

“…This change in Na + and K + level could be attributed to the ability of chitosan in improving the growth of tomato plants or throughout osmolytes content increases, which acquire a plant balance in facing salinity stress. These results are in harmony with the results of [ 71 , 81 ], who also reported that chitosan treatment significantly increased Na + and K + content in salinity stress wheat plants.…”

Effect of Ascorbic Acid and Calcium Foliar Application on Growth, Yield and Marketability of Broccoli

“…It has antioxidant functions, dissolves in water and has an important protection role against reactive oxygen species that consisted during the photosynthesis and respiration (2,19). Metwaly (33) noted that the foliar application of ascorbic acid on the cabbage plant had a significant increment on plant height, leaves area, chlorophyll content, yield, and vitamin C concentration. It was also found (36) that the foliar application of ascorbic acid on broccoli plant for both seasons had a significant increment on leaves area, yield, and the concentration of vitamin C. Balouchi (13) noted that immersion of the flowering heads in the ascorbic acid was significantly increased the shelf life, the concentration of vitamin C, chlorophyll content, TSS, and recorded the least weight loss, these results agreed with (15), It was also found (6) Ascorbic acid significantly increased all vegetative growth, physical and chemical fruits properties of olive.…”