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Global warming has become the most serious issue in the world.The global average surface temperature has gradually increased over the last 50 years,and unprecedented abnormal climates have occurred around the globe.Ecosystems are being seriously threatened,and many species are endangered due to loss of habitat.Plants are not immune from global warming,but because of their sessile nature,plants have evolved elaborate sensory mechanisms for ambient temperatures.Growing concerns include how plants sense the temperature changes and what nat-ural variations have evolved for plant adaptation to given habitat climates.