Physiological Mechanism of Thermotolerance in Wheat (<i>Triticum aestivum</i>Lin.) Seedlings

• 作者: Jalal Uddin Ahmed Kim Taewan Md. Mahi Imam Mollah Soyema Khatun
• 来源期刊: 美国植物学期刊(英文)
• 学科: 医学
• 关键词: Thermo Tolerance Mobilized Seed Reserve Heat Stress WHEAT
• 年，卷（期）: 2018,（13）
• 页码范围: 2719-2727
• 页数: 9页
• 分类号: R73

摘要

A research work was performed under sub-tropical condition (24°8'N, 90°0'E) at Bangabandhu Sheikh Mujibur Rahman Agricultural University with three wheat genotypes (BARI Gom 25, BARI Gom 26 and Pavon 76) to observe the mobilization of seed reserve and seedling growth under normal (15°C/25°C) and elevated (25°C/35°C) temperature in growth chamber. The effect of high temperature on wheat seedling was observed in terms of mobilized seed reserve, respiration and transpiration efficiency and seedling growth. At 35°C temperature, maximum mobilization of seed reserve was observed in BARI Gom varieties (BARI Gom 25 and 26) but the respiration efficiency was higher in Pavon 76 in comparison to other genotypes. Maximum loss of respiration and transpiration at 35°C temperature was found to produce low seedling growth in Pavon 76. It appeared from the result that at high temperature the maximum mobilized seed reserve and subsequently minimum loss of respiration and transpiration collectively contributed a positive role for better seedling growth in BARI Gom 25 and BARI Gom 26. Therefore the better mobilized seed reserve and subsequently minimum loss of respiration and transpiration during seedling development are indicators of the thermo tolerance in growing wheat seedling.