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In this study, to the center, on the 4th and Zhongza the 9th tomato materials to study the low-temperature low-light processing and its processing time different morphological, physiological and biochemical adaptation mechanisms of tomato plants to chilling under low light , and explore the relationship between tomato extreme low temperature with suboptimal temperature , aims to provide a theoretical basis for the resistance, low temperature resistant to low light tomato breeding and cultivation measures . The study results show that : the low temperatures , the tomato varieties significant differences in germination rate of 13 ℃ ; hypothermia Tomato cumulative impact was not significant , but beneficial in low light tomato dry matter accumulation , low-light treatment will reduce the accumulation of dry matter of tomato tomato dry weight accumulation ; with the decline of the processing temperature in a low temperature environment , in the center, on the 4th in Miscellaneous No. 9 chlorophyll a and b content decreased leaf mass and leaf mass ratio of linear equations can be used to , but its chlorophyll a / b values ??gradually increase ; injury rate of Warming on tomato leaves little impact ; enhance root activity at low temperatures , malondialdehyde content , proline content tended to increase with the temperature drop ; 15 ° C ( day ) / 5 ℃ ( night) for 15 days , in the center, 4, dry weight , and root activity was significantly higher than the control , while MDA content was significantly lower than the control , while the opposite in Miscellaneous performance ; weak light will reduce the tomato dry matter accumulation , so the Chla, Chlb content and of Chla / Chlb ratio ratio both increased , significantly increases the damage rate of tomato leaves . Low Light after making tomato chlorophyll a and b content decreased chlorophyll a / b values ??are all higher than the control treatment , processing temperature of 15 ° C ( day ) / 10 ° C ( night) and 15 ° C ( day ) / 5 ° C ( night ) , light intensity 109μmol.m -2 s -1 < / sup > or 43μmol.m -2 s -1 < / sup>, the vegetables 4 and Zhongza 9 in 4 different processing time of chlorophyll a , the B content is reduced significantly . Strong light helps the tomato root activity enhanced low temperature , the stronger the light levels in low temperatures , malondialdehyde content , higher proline
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