Abstract: High-temperature stress is one of the major disasters to rice production.If high temperature stress occurred at heading stage,rice glumous flower will be infertility and fruit bearing percentage decreasing.If high-temperature stress meet at filling stage,grain-filling would fail and grain weight would be lessen.High temperature stress not only has the impact on the physiological and biochemical indexes,such as,rice photosynthesis,membrane permeability,starch synthesis,soluble sugar,proline and so on,but also on rice yields and quality.

Key words: High temperature stress to rice, Heading stage, Filling stage