The study investigates the effects of salicylic acid (SA) and thiourea on the morphological and physiological parameters of mustard (Brassica juncea (L.) Czern & Coss) genotypes under high-temperature stress. Two consecutive years (2017-18 and 2018-19) were considered for the assessment. Morphological parameters such as plant height, number of primary branches plant-1, and number of secondary branches plant-1 were evaluated along with physiological parameters including relative water content (%) and chlorophyll stability index. Results revealed significant variations in plant height, branch numbers, and physiological parameters under different treatments. Notably, foliar application of thiourea exhibited the highest enhancement in plant height and branch numbers compared to SA treatments and controls. Moreover, variations in relative water content and chlorophyll stability index were observed across treatments, suggesting a potential role of foliar application in mitigating high-temperature stress effects on mustard genotypes. The study evaluated the influence of sowing time, variety and foliar spray on morphological and physiological traits of mustard. Normal sowing of variety Pusa Mustard-26 with foliar application of thiourea led to superior plant growth, branches, water content and chlorophyll stability compared to late sowing and other treatments. Timely cultivation practices can help boost productivity

Mustard, Salicylic acid, Thiourea, High-temperature stress, Morphological parameters, Physiological parameters, Chlorophyll stability

The study evaluated the effect of sowing time, variety and foliar application on morphological and physiological parameters of mustard. Significantly higher plant height, number of branches and relative water content were recorded with normal sowing of Pusa Mustard-26 variety. Among foliar treatments, application of thiourea led to better plant height, branches and chlorophyll stability index compared to control. Late sowing and RGN-145 variety showed lower performance. Thus, normal sowing of Pusa Mustard-26 with foliar spray of thiourea can improve growth and yield contributing attributes of mustard crop

Khushboo Gupta, Savita Jangde, Tannu Priya, Pooja and Bhudeo Rana Yashu (2023). Influence of Salicylic Acid and Thiourea on Morphological and Physiological parameters of Mustard (Brassica juncea (L.) Czern & Coss) Genotypes under High Temperature Stress. Biological Forum – An International Journal, 15(12): 506-512.