Abstract In the present study, tomatoes were grown under control conditions (CT), a moderate (MT, up to 2 °C) or a higher rise in temperature (HT, up to 5 °C), and a moderate rise followed by a lower air temperature at the end of the day (ED), in order to analyze the effects of increased temperature as well as management system impact on fruit quality. Rising temperatures up to 5 °C reduced the fruit growth duration by five days and greatly reduced the fresh (29.7 %) and dry matter (30 %) accumulation rate. Increasing the temperature during the day and lowering it at the end of the day increased citric and malic acid concentrations in the fruit, therefore reducing the sugar/acid ratio. The ascorbate concentration and carotenoids increased in the fruits grown under high temperature, while phenolics concentrations did not change. Fruit water conductance was strongly reduced under HT (−37 %), and so was starch accumulation, in contrast to hexoses. Dropping the air temperature at the end of the day could help mitigate HT impacts as it slightly increased the pericarp dry matter content. It could also improve seeds quality as it increased their dry matter content. It would be interesting to consider broader changes in ED temperature to confirm its potential role in improving fruits dry matter content.

中文翻译：

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昼夜温升对番茄果实品质的影响. 温室气候的管理能否减轻这种影响？

摘要 在本研究中，西红柿在控制条件 (CT)、温和 (MT，最高 2 °C) 或更高的温度升高 (HT，最高 5 °C) 和温和升高后生长在一天结束时降低气温 (ED)，以分析温度升高的影响以及管理系统对水果质量的影响。温度上升至 5 °C 会使水果的生长持续时间缩短 5 天，并大大降低新鲜 (29.7 %) 和干物质 (30 %) 的积累率。白天升高温度并在一天结束时降低温度会增加水果中柠檬酸和苹果酸的浓度，从而降低糖/酸比。高温下生长的果实中抗坏血酸浓度和类胡萝卜素含量增加，而酚类物质浓度没有变化。与己糖相比，HT（-37%）下果实水分电导率显着降低，淀粉积累也是如此。在一天结束时降低气温有助于减轻 HT 的影响，因为它略微增加了果皮干物质含量。它还可以提高种子质量，因为它增加了干物质含量。考虑 ED 温度的更广泛变化以确认其在提高水果干物质含量方面的潜在作用会很有趣。