With the impact of global warming,high temperature has become one of the major environmental factors affecting plant growth,development,yield and geographical distribution.Heat stress can cause a series of physiological and biochemical reactions in plants,including the accumulation of reactive oxygen species,the increase of cell membrane lipid peroxidation,the loss of water,the inhibition of photosynthesis and the loss of enzyme activity.As a thermophilic vegetable originated in the tropics,tomato is very s...