Metabolic profiles of tomatoes change during ripening and light can modulate the activity of relevant biochemical pathways. We investigated the effects of light directly supplied to the fruits on the metabolome of the fruit pericarp during ripening. Mature green tomatoes were exposed to well-controlled conditions with light as the only varying factor; control fruits were kept in darkness. In experiment 1 the fruits were exposed to either white light or darkness for 15 days. In experiment 2, fruits were exposed to different light spectra (blue, green, red, far-red, white) added to white background light for seven days. Changes in the global metabolome of the fruit pericarp were monitored using LCMS and GCMS (554 compounds in total). Health-beneficial compounds (carotenoids, flavonoids, tocopherols and phenolic acids) accumulated faster under white light compared to darkness, while alkaloids and chlorophylls decreased faster. Light also changed the levels of taste-related metabolites including glutamate and malate. The light spectrum treatments indicated that the addition of blue light was the most effective treatment in altering the fruit metabolome. We conclude that light during ripening of tomatoes can have various effects on the metabolome and may help with shaping the levels of key compounds involved in various fruit quality characteristics.

中文翻译：

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LED灯对番茄果实代谢组的调节。

番茄的代谢曲线在成熟过程中会发生变化，光照可以调节相关生化途径的活性。我们研究了在成熟期间直接提供给水果的光对果皮果皮代谢组的影响。将成熟的绿色番茄暴露在良好控制的条件下，光线是唯一变化的因素。控制水果被放在黑暗中。在实验1中，将果实暴​​露于白光或黑暗中15天。在实验2中，将水果暴露于添加到白色背景光中的不同光谱（蓝色，绿色，红色，远红色，白色）中，持续7天。使用LCMS和GCMS（总共554种化合物）监测了果皮的全球代谢组的变化。有益健康的化合物（类胡萝卜素，类黄酮，与黑暗相比，白光下维生素E和酚酸的积累更快，而生物碱和叶绿素的下降更快。光照还改变了与味觉相关的代谢物的水平，包括谷氨酸和苹果酸。光谱处理表明，添加蓝光是改变水果代谢组的最有效方法。我们得出的结论是，西红柿成熟过程中的光照可能对代谢组有各种影响，并且可能有助于塑造涉及各种水果品质特征的关键化合物的水平。光谱处理表明，添加蓝光是改变水果代谢组的最有效方法。我们得出的结论是，西红柿成熟过程中的光照可能对代谢组有多种影响，并可能有助于塑造涉及各种水果品质特征的关键化合物的水平。光谱处理表明，添加蓝光是改变水果代谢组的最有效方法。我们得出的结论是，西红柿成熟过程中的光照可能对代谢组有多种影响，并可能有助于塑造涉及各种水果品质特征的关键化合物的水平。