Author(s):

Dadrwal BK, BL Kakralya and DL Bagdi

Abstract: A pot experiment was conducted during rabi season, 2018 in the cage house at Department of Plant Physiology, S.K.N. College of Agriculture, Jobner, Rajasthan to study the effect of ascobin in alleviating the adverse effects of salinity on physiological, biochemical and yield attributes of wheat. Wheat cultivars namely Raj-4037 (salinity susceptible) and Raj-3077 (Salinity tolerant) were grown in ceramic pots under salinity conditions (0, 4 and 8 dSm^-1). Different concentrations of ascobin (0, 500,750 and 1000 ppm) were sprayed at 45 and 65 days after sowing. Control plants were provided normal water. Different growth and physio-biochemical observations were recorded at 55 and 75 days after sowing in pot conditions. Yield parameters were recorded at harvest. Result revealed a significant decrease were recorded in chlorophyll, protein, relative water content, cell membrane stability, plant height, leaf area, number of effective tillers per plant, number of spikes per plant, length of spike, number of seeds per spike, grain yield, biological yield per plant, harvest index and test weight whereas, proline content and reducing sugar increased with salt stress up to EC 8 dSm^-1 in both the cultivars at 55 and 75 DAS. The foliar spray treatment with ascobin up to 1000 ppm significantly increased growth and physio-biochemical. The 1000 ppm concentration of ascobin was found most effective in increasing the parameters studied. Reduction in physiological-biochemical and yield contributing parameters on account of salt stress was more in cultivar Raj-4037. On the basis of the above findings genotype Raj-3077 observed most salt tolerant and the tolerance was mediated by physiological-biochemical and yield characteristics.

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