Impact of High Temperature on Germination, Seedling Growth and Enzymatic Activity of Wheat
Sushma Sharma,
Vikram Singh,
Hemender Tanwar,
Virender Singh Mor,
Mukesh Kumar,
Ramesh Chander Punia,
Mohinder Singh Dalal,
Mujahid Khan,
Sonali Sangwan,
Axay Bhuker,
Chander Shekhar Dagar,
Shikha Yashveer,
Jogender Singh
Affiliations
Sushma Sharma
Department of Seed Science and Technology, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Vikram Singh
Department of Genetics and Plant Breeding, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Hemender Tanwar
Department of Seed Science and Technology, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Virender Singh Mor
Department of Seed Science and Technology, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Mukesh Kumar
Department of Genetics and Plant Breeding, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Ramesh Chander Punia
Department of Seed Science and Technology, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Mohinder Singh Dalal
Department of Genetics and Plant Breeding, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Mujahid Khan
Agricultural Research Station (S.K.N. Agriculture University, Jobner), Sikar 332301, Rajasthan, India
Sonali Sangwan
Department of Biotechnology, Maharishi Markandeshwar University, Mullana, Ambala 133207, Haryana, India
Axay Bhuker
Department of Seed Science and Technology, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Chander Shekhar Dagar
Department of Agrometeorology, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Shikha Yashveer
Department of Molecular Biology, Biotechnology and Bioinformatics, Chaudhary Charan Singh Haryana Agricultural University, Hisar 125004, Haryana, India
Global warming has increased the temperature significantly over a large extent both spatially and temporally. The threat of heat stress during the germination and seedling establishment stages in the wheat crop is now more prevalent than ever before. The present experiment assessed the effect of elevated temperature on the germination and early seedling growth of wheat genotypes. The seeds were sown under four temperatures, viz., 20 °C, 25 °C, 30 °C and 35 °C; the germination, seedling vigor and enzyme activities in 8-day-old seedlings were assessed. The temperature significantly influenced germination and early seedling growth. The germination percentage at 20 and 25 °C was statistically on par with and higher than at 30 and 35 °C. The seedling vigor parameters were maximum at 25 °C and showed a reduction at higher temperatures. Genotypic differences were observed for early heat stress as the genotypes WH 730, WH 1123 and HD 2967 showed tolerance towards heat stress during germination, whereas the genotypes PBW 725 and WH 1105 were susceptible. Antioxidant enzyme activities in seedlings increased with the rise in temperature. Catalase, peroxidase and superoxide dismutase enzymes showed increased activities at higher temperature levels.
