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Eggplant originated in Southeast Asia, is a thermophilic vegetables occupy an important position in China's solar greenhouse vegetable production. Winter night of the long-term mild hypothermia and spring term daytime sub-high temperature impact the greenhouse eggplant growth and development, but less. The test includes two parts, the first part of the long-term night temperature of 9 ℃, 12 ℃ to deal with the second part of the long day temperature of 38 ℃, 33 ℃, by measuring the morphology of the eggplant under mild hypothermia and sub-high temperature conditions changes in the indicators, physiological and biochemical indicators photosynthetic parameters, is designed to study the impact of growth and development of mild hypothermia at night and daytime sub-high temperature of eggplant, methods and theoretical basis for the production of solar greenhouse eggplant. The main findings are as follows: 1, under the conditions of long-term mild hypothermia at night, as the processing time, the eggplant plant height, stem diameter trend decrease, growth by a certain degree of inhibition of plant height as Eggplant by The basis for the evaluation of the impact of mild hypothermia. 2, under the conditions of long-term mild hypothermia at night, as the treatment time, soluble sugar content at first rose sharply after the decline, after an upward trend; showed a downward trend in total chlorophyll content, chlorophyll a / b value upward trend ; MDA content compared to pre-treatment, the overall upward trend. Eggplant membrane protective enzyme system (SOD, POD, CAT) activity is closely related to the relative size of the processing time. 9 d, SOD activity in the lowest activity of 9 ℃, 12 ° C the highest, 9 ℃ lower than that of the control. With hypothermia processing, POD, the CAT activity of slowly increasing, the lower the treatment temperature, the higher its activity. POD and CAT activity can be as mild hypothermia affects the identification of indicators of the eggplant. 4, in the long night of mild hypothermia treatment, eggplant next day Pn, Gs, Tr been to a certain extent. And different processing time processing and control, in handling 9 d, photosynthetic parameters has been greatly affected. Pn, Gs, Tr evaluation of mild hypothermia on the the eggplant impact indicators. These indicators should be cross-referenced. 5, the long-term daytime sub-high temperature conditions, as the treatment time, eggplant plant height, stem diameter was obviously promoting, including plant height can be the basis of the evaluation of the impact of the sub-high temperature as Eggplant. 6, in the long-term daytime sub-high temperature conditions, as the treatment time, the soluble sugar content presents the trend of decreased first and then increased, and finally reduced; slow upward trend in the overall total chlorophyll content, to the content of 33 ° C treatment always in the highest; chlorophyll a / b ratio showed a slow downward trend. MDA content compared to pre-treatment, the overall upward trend, which is always in the highest content of 38 ℃. Processing SOD activity in the daytime sub-high temperature treatment are first increased and then a downward trend, CAT activity showed enhanced trend, the greater sub-high temperature, the higher the temperature activity. Daytime sub-high temperature for 4 d, 38 ° C, 33 ° C treatment POD activity almost equal, higher than the control. SOD, CAT activity changes as the eggplant identification of sub-high temperature indicators POD activity change is not the best identification of indicators. 8, daytime sub-high temperature treatment a great influence on photosynthetic parameters of eggplant. With the treatment time, the higher the temperature, the net photosynthetic rate of sub-high temperature processing becomes low. In the whole process, stomatal conductance values ??of 38 ° C treatment eggplant leaf transpiration rate has been living in the highest. These indicators should be cross-referenced.
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