Vol. 12, Issue 8 (2023)

Author(s):
Prafulla Kumar, Ravindra Kumar, Lokesh Kumar Gangwar, Mukesh Kumar, Amit Kumar and Ankit Agrawal

Abstract:
Wheat (Triticum aestivum) is a vital global cereal crop, playing a pivotal role in food security. In India, it is crucial for sustenance and economic stability. However, heat stress poses a significant threat to wheat production, especially during terminal growth stages. This study examined the responses of six wheat genotypes to terminal heat stress. Physiological and biochemical traits were evaluated, including chlorophyll content, relative water content, injury % of cellular membrane stability, proline accumulation, catalase activity, and peroxidase activity. Under heat stress, chlorophyll content, water retention, and membrane stability decreased, while proline, catalase, and peroxidase activities was increased. Variability in genotypic responses highlighted genetic diversity in heat stress adaptation. Genotypes like RAJ4083, PBW71 and DBW90 exhibited higher tolerance, making them potential candidates for heat-resistant varieties. These findings deepen our understanding of wheat's responses to heat stress, emphasizing the significance of genetic diversity. This knowledge could contribute to breeding strategies for heat-tolerant wheat, enhancing food security in a changing climate.