Effects of Different Temperature and Light on Tomato Photosynthesis in the Greenhouse

[Objective] The effects of temperature and illumination level combination on tomato physiological indexes were studied to provide the theoretical basis for reasonable TPS in tomato cultivation process. [Method]In sunlight greenhouse,by artificial heating and lighting,under different sowing conditions,the physiological indexes of tomato were measured,the differences between different processing were compared,and measurement indicators were analyzed. [Result] With the temperature increasing,the tomato leaf Chla and Chlb content increased,chlorophyll a / b value decreased,and leaf free proline content decreased significantly. At the same temperature conditions,with the increase of light intensity,Chla and Chlb content reduced,and chlorophyll a / b value,free proline content and root activity increased. But in the natural temperature processing environment,plant leaf free proline content was higher than that of warming within 3-4 and 6-7 ℃ treatment area. Root activity early change wasn't obvious. With the extension of time,root activity increased quickly in the late period. [Conclusion] With the increase of light intensity,chlorophyll content was lower,and Pro content increased. With the increase of the temperature,the chlorophyll content increased,and Pro content decreased. But in the same condition of temperature,with the increase of light intensity,root activity increased.