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Effect of Heat Stress on Growth and Yield in Mungbean Genotypes

Department of Botany, Kurukshetra University, Kurukshetra-136 119 (Haryana), India
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Received: February 15, 2023; Accepted: March 24, 2023)


Several studies have been carried out to explore and improve the mungbean tolerance to high-temperature stress. Therefore, the present work was conducted to analyze the impact of heat stress on the vegetative, physiological and reproductive traits of 13 mungbean genotypes. The mungbean genotypes were grown at two sowing times i. e. the last week of March (normal sown) and April (late sown). In late-sown, leaves chlorosis signs, scorching and rolling of leaf were observed due to high temperature. High- temperature stress decreased leaf area, plant height, relative water content, chlorophyll content and increased the electrolyte leakage. In addition to this, phenology was hastened, resulting in a noticeable decrease in flowers’ number, pods and seeds weight, thereby reducing pod and seed yields. During reproductive period, heat stress was detrimental in all late sown mungbean genotypes. Based on present study, MH 125, MH 421 and PDM 139 were tolerant to heat stress and MH 318, IPM 02-3 and PM-5 were sensitive.
Key words : Heat stress, mungbean, phenology, tolerant, sensitive