Effect of Heat Stress on Lipid Characteristics and Protein Patterns In Two Varieties of Hordeum vulgare L.

Abstract

Grains of two cultivars of barley (Hordeum vulgare L.); Giza 124 and Giza 125 were germinated in Petri-dishes on free-nutrient sand and irrigated with distilled water for six days.

Thereafter, some samples were exposed to heat shock at 35°C or 45°C for 2, 4, 6 or 8h. Another group representing the control was not exposed .to any heat treatment. For determining the growth criteria at the vegetative stage (50-day old), some of the heat shocked seedlings 35°C and 45°C for 2, 4 or•6h and control ones were transplanted into plastic pots (17 em in diameter, containing 1.8 Kg soil (2 clay: 1 sand)], then transferred to the greenhouse. For determining the yield criteria, another set of seedlings were transplanted into wider plastic pots [21 em in diameter, containing 2.8 Kg soil (2 clay: 1 sand)] then transferred to the greenhouse.